EXECUTION COPY

RECONSTITUTED SERVICING AGREEMENT

THIS RECONSTITUTED SERVICING AGREEMENT (this “Agreement”), entered into as of the 1st day of October, 2006, by and between LEHMAN BROTHERS HOLDINGS INC., a Delaware corporation (“LBH” or “Seller”), and WELLS FARGO BANK, N.A., a national banking association (the “Servicer”), and acknowledged by AURORA LOAN SERVICES LLC, a Delaware limited liability company (“Aurora” or “Master Servicer”) and CITIBANK, N.A., a national banking association, as Trustee under the Trust Agreement defined below (the “Trustee”), recites and provides as follows:

RECITALS

WHEREAS, Lehman Brothers Bank, FSB (“LBB”) acquired certain conventional, residential, fixed rate, first lien mortgage loans from the Servicer.

WHEREAS, the Seller has conveyed certain Mortgage Loans (the “Mortgage Loans”) to Structured Asset Securities Corporation, a Delaware special purpose corporation (“SASCO”), which in turn has conveyed the Mortgage Loans to the Trustee, pursuant to a trust agreement, dated as of October 1, 2006 (the “Trust Agreement”), attached as Exhibit B-1 hereto, among the Trustee, the Master Servicer and SASCO, as depositor (the “Depositor”);

WHEREAS, the Mortgage Loans are currently being serviced under the Master Seller’s Warranties and Servicing Agreement, as amended by Amendment No. 1 to the Master Seller’s Warranties and Servicing Agreement, dated August 1, 2006, between LBB, as purchaser, and the Servicer, as seller and servicer, dated May 1, 2006, the Assignment and Conveyance Agreement (06-W64), dated July 28, 2006 and the Assignment and Conveyance Agreement (06-W86), dated October 26, 2006 (collectively, the “Master SWSA”), annexed hereto as Exhibit C.

WHEREAS, pursuant to an Assignment and Assumption Agreement, dated as of October 1, 2006 (the “Assignment and Assumption Agreement”) and annexed hereto as Exhibit B-2, LBB has assigned all of its rights, title and interest in the Mortgage Loans as well as all of its rights and obligations as purchaser under the Master SWSA to LBH, and LBH has accepted such assignment.

WHEREAS, the Seller desires that the Servicer continue to service the Mortgage Loans, and the Servicer has agreed to do so, pursuant to the Master SWSA, subject to the rights of the Seller and the Master Servicer to terminate the rights and obligations of the Servicer hereunder as set forth herein and to the other conditions set forth herein.

WHEREAS, the Seller and the Servicer agree that the provisions of the Master SWSA shall apply to the Mortgage Loans, but only to the extent provided herein and that this Agreement shall govern the Mortgage Loans for so long as such Mortgage Loans remain subject to the provisions of the Trust Agreement.

WHEREAS, the Master Servicer and any successor master servicer shall be obligated, among other things, to supervise the servicing of the Mortgage Loans on behalf of the Trustee, and shall have the right, under certain circumstances, to terminate the rights and obligations of the Servicer under this Agreement.

WHEREAS, the Seller and the Servicer intend that each of the Master Servicer and the Trustee is an intended third party beneficiary of this Agreement.

NOW, THEREFORE, in consideration of the mutual agreements hereinafter set forth and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the Seller and the Servicer hereby agree as follows:

AGREEMENT

1.Definitions. Capitalized terms used and not defined in this Agreement, including Exhibit A hereto and any provisions of the Master SWSA incorporated by reference herein (regardless if such terms are defined in the Master SWSA), shall have the meanings ascribed to such terms in the Trust Agreement.

2.Custodianship. The parties hereto acknowledge that Wells Fargo Bank, N.A. will act as custodian (the “Custodian”) of the Custodial Mortgage Files for the Trustee pursuant to the Custodial Agreement, dated as of October 1, 2006, between the Custodian and the Trustee.

3.Servicing. The Servicer agrees, with respect to the Mortgage Loans, to perform and observe the duties, responsibilities and obligations that are to be performed and observed under the provisions of the Master SWSA, except as otherwise provided herein and on Exhibit A hereto, and that the provisions of the Master SWSA, as so modified, are and shall be a part of this Agreement to the same extent as if set forth herein in full. Furthermore, the Servicer agrees to notify the Master Servicer of any notice of rescissions or reduction of coverage under the PMI Mortgage Insurance Co. (“PMI”) insurance policy or the Mortgage Guaranty Insurance Corporation (“MGIC”) insurance policy if a Mortgage Loan covered by such policies is in default.

The Servicer additionally agrees that the Servicer will fully furnish, in accordance with the Fair Credit Reporting Act of 1970, as amended (the “Fair Credit Reporting Act”) and its implementing regulations, accurate and complete information (e.g., favorable and unfavorable) on its borrower credit files to Equifax, Experian, and Trans Union Credit Information Company (three of the credit repositories) on a monthly basis.

4.Trust Cut-off Date. The parties hereto acknowledge that by operation of Section 4.05 and Section 5.01 of the Master SWSA, the remittance on November 20, 2006 to the Trust Fund is to include principal due after October 1, 2006 (the “Trust Cut-off Date”) plus interest, at the Mortgage Loan Remittance Rate collected during the related Due Period exclusive of any portion thereof allocable to a period prior to the Trust Cut-off Date, with the adjustments specified in clauses (b), (c) and (d) of Section 5.01 of the Master SWSA.

5.Master Servicing; Termination of Servicer. The Servicer, including any successor servicer hereunder, shall be subject to the supervision of the Master Servicer, which Master Servicer shall be obligated to ensure that the Servicer services the Mortgage Loans in accordance with the provisions of this Agreement. The Master Servicer, acting on behalf of the Trustee and the LXS 2006-17 Trust Fund (the “Trust Fund”) created pursuant to the Trust Agreement, shall have the same rights as the Seller under the Master SWSA to enforce the obligations of the Servicer under the Master SWSA and the term “Purchaser” as used in the Master SWSA in connection with any rights of the Purchaser shall refer to the Master Servicer, except as otherwise specified in Exhibit A hereto. The Master Servicer shall be entitled to terminate the rights and obligations of the Servicer under this Agreement upon the failure of the Servicer to perform any of its obligations under this Agreement, as provided in Article X (Default) of the Master SWSA.  The replacement of the Servicer will require the prior approval of the insurers, PMI and MGIC, which approval shall not be reasonably withheld. Notwithstanding anything herein to the contrary, in no event shall the Master Servicer be required to assume any obligations of the Seller under the Master SWSA; and, in connection with the performance of the Master Servicer’s duties hereunder, the parties and other signatories hereto agree that the Master Servicer shall be entitled to all of the rights, protections and limitations of liability afforded to the Master Servicer under the Trust Agreement.

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6.No Representations. Neither the Servicer nor the Master Servicer shall be obligated or required to make any representations and warranties regarding the characteristics of the Mortgage Loans (other than those representations and warranties made by the Servicer in Section 3.01 of the Master SWSA, which the Servicer hereby restates as of the Closing Date) in connection with the transactions contemplated by the Trust Agreement and issuance of the Certificates issued pursuant thereto.

7.Notices. All notices and communications between or among the parties hereto (including any third party beneficiary thereof) or required to be provided to the Trustee shall be in writing and shall be deemed received or given when mailed first-class mail, postage prepaid, addressed to each other party at its address specified below or, if sent by facsimile or electronic mail, when facsimile or electronic confirmation of receipt by the recipient is received by the sender of such notice. Each party may designate to the other parties in writing, from time to time, other addresses to which notices and communications hereunder shall be sent.

All notices required to be delivered to the Master Servicer under this Agreement shall be delivered to the Master Servicer at the following address:

Aurora Loan Services LLC

10350 Park Meadows Drive

Littleton, Colorado 80124

Attention: Jerald W. Dreyer

Telephone: (720) 945-3422

Telecopier: (720) 945-3123

All remittances required to be made to the Master Servicer under this Agreement shall be made on a scheduled/scheduled basis to the following wire account:

JPMorgan Chase Bank, National Association

New York, New York

ABA#: 021-000-021

Account Name: Aurora Loan Services LLC,

Master Servicing Payment Clearing Account

Account Number: 066-611059

Beneficiary: Aurora Loan Services LLC

For further credit to: LXS 2006-17

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All notices required to be delivered to the Trustee hereunder shall be delivered to the Trustee at the following address:

Citibank, N.A.

388 Greenwich Street, 14th Floor

New York, New York 10013

Attention: Citibank Agency and Trust (LXS 2006-17)

Telephone: (212) 816-5827

Facsimile: (212) 816 -5527

All written information required to be delivered to the Seller hereunder shall be delivered to LBH at the following address:

Lehman Brothers Holdings Inc.

745 Seventh Avenue, 7th Floor

New York, New York 10019

Attention: Contract Finance - LXS 2006-17

Telephone: (212) 884-6292

Facsimile: (212) 884-6450

All notices required to be delivered to the Servicer hereunder shall be delivered to its office at the address for notices as set forth in the Master SWSA.

8.Acknowledgement. The Servicer hereby acknowledges that the rights and obligations of LBB under the Master SWSA will be assigned to the Seller on the Closing Date pursuant to the Assignment and Assumption Agreement; that such rights and obligations, as amended by this Agreement will, in turn, be re-assigned by the Seller to SASCO under the Mortgage Loan Sale and Assignment Agreement; and that such rights and obligations will simultaneously be re-assigned by SASCO to the Trust Fund under the Trust Agreement. The Servicer agrees that the Assignment and Assumption Agreement will be a valid assignment and assumption agreement or other assignment document required pursuant to Sections 2.02 and 12.10 of the Master SWSA and will constitute a valid assignment and assumption of the rights and obligations of LBB under the Master SWSA to the Seller. In addition, the Trust Fund will make a REMIC election. The Servicer hereby consents to each such assignment and assumption and acknowledges the Trust Fund’s REMIC election.

9.Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, WITHOUT REFERENCE TO ITS CONFLICT OF LAW PROVISIONS (OTHER THAN SECTION 5-1401 OF THE GENERAL OBLIGATIONS LAW), AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

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10.Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed shall be deemed to be an original, but all of which counterparts shall together constitute but one and the same instrument.

11.Reconstitution. The Seller and the Servicer agree that this Agreement is a reconstituted agreement executed in connection with a “Securitization Transaction,” and that the date hereof is the “Reconstitution Date,” each as defined in the Master SWSA.

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Executed as of the day and year first above written.

LEHMAN BROTHERS HOLDINGS INC.,

as Seller

By: /s/ Michael Hitzmann

Name: Michael Hitzmann

Title: Authorized Signatory

WELLS FARGO BANK, N.A.,

as Servicer

By: /s/ Bradley A. Davis

Name: Bradley A. Davis

Title: Vice President

Acknowledged:

AURORA LOAN SERVICES LLC,

as Master Servicer

By: /s/ Jerald W. Dreyer

Name: Jerald W. Dreyer

Title: Vice President

CITIBANK, N.A.,

as Trustee and not individually

By: /s/ Valerie Delgado

Name: Valerie Delgado

Title: Vice President

EXHIBIT A

Modifications to the Master SWSA

1. Unless otherwise specified herein, any provisions of the Master SWSA, including definitions, relating to (i) representations and warranties relating to the Mortgage Loans and not relating to the servicing of the Mortgage Loans, (ii) Mortgage Loan repurchase obligations, (iii) Whole Loan Transfers, Securitization Transactions and Reconstitution, and (iv) Assignments of Mortgage, shall be disregarded for purposes relating to this Agreement. The exhibits to the Master SWSA and all references to such exhibits shall also be disregarded.

2. The definition of “Accepted Servicing Practices” in Article I is hereby amended to read as follows:

Accepted Servicing Practices: With respect to any Mortgage Loan, those mortgage servicing practices (i) of prudent mortgage lending institutions which service mortgage loans of the same type as such Mortgage Loan in the jurisdiction where the related Mortgaged Property is located and (ii) in accordance with applicable state, local and federal laws, rules and regulations.

3. The definition of “Custodial Agreement” in Article I is hereby amended to read as follows:

CustodialAgreement: Each custodial agreement relating to custody of certain of the Mortgage Loans, each between a Custodian and the Trustee and each acknowledged by the Master Servicer, the Seller, the Servicer and the Depositor, each dated as of October 1, 2006.

4. The definition of “Custodian” in Article I is hereby amended to read as follows:

Custodian: means Wells Fargo Bank, N.A. and any of its successors and assigns.

5. The definition of “Determination Date” in Article I is hereby amended to read as follows:

Determination Date: With respect to each Remittance Date, the 15^th day of the month in which such Remittance Date occurs, or, if such 15^th day is not a Business Day, the next succeeding Business Day.

6. A new definition of “Document Transfer Event” is hereby added to Article I immediately following the definition of “Distressed Mortgage Loan” to read as follows:

Document Transfer Event: The day on which (i) Wells Fargo Bank, N.A. or any successor thereto is no longer the servicer of any of the Mortgage Loans, (ii) the senior, unsecured long-term debt rating of Wells Fargo & Company is less than “BBB-” by Fitch or (iii) any Rating Agency requires the Company to deliver the Retained Mortgage Files to the Custodian.

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7. A new definition of “Eligible Investments” is hereby added to Article I immediately following the definition of “Eligible Institution” to read as follows:

Eligible Investments: Any one or more of the obligations and securities listed below which investment provides for a date of maturity not later than the Determination Date in each month:

(i)direct obligations of, and obligations fully guaranteed as to timely payment of principal and interest by, the United States of America or any agency or instrumentality of the United States of America the obligations of which are backed by the full faith and credit of the United States of America ("Direct Obligations");

(ii)federal funds, or demand and time deposits in, certificates of deposits of, or bankers' acceptances issued by, any depository institution or trust company (including U.S. subsidiaries of foreign depositories and the Trustee or any agent of the Trustee, acting in its respective commercial capacity) incorporated or organized under the laws of the United States of America or any state thereof and subject to supervision and examination by federal or state banking authorities, so long as at the time of investment or the contractual commitment providing for such investment the commercial paper or other short term debt obligations of such depository institution or trust company (or, in the case of a depository institution or trust company which is the principal subsidiary of a holding company, the commercial paper or other short term debt or deposit obligations of such holding company or deposit institution, as the case may be) have been rated by each Rating Agency in its highest short-term rating category or one of its two highest long-term rating categories;

(iii)repurchase agreements collateralized by Direct Obligations or securities guaranteed by Ginnie Mae, Fannie Mae or Freddie Mac with any registered broker/dealer subject to Securities Investors' Protection Corporation jurisdiction or any commercial bank insured by the FDIC, if such broker/dealer or bank has an uninsured, unsecured and unguaranteed obligation rated by each Rating Agency in its highest short-term rating category;

(iv)securities bearing interest or sold at a discount issued by any corporation incorporated under the laws of the United States of America or any state thereof which have a credit rating from each Rating Agency, at the time of investment or the contractual commitment providing for such investment, at least equal to one of the two highest long term credit rating categories of each Rating Agency; provided, however, that securities issued by any particular corporation will not be Eligible Investments to the extent that investment therein will cause the then outstanding principal amount of securities issued by such corporation and held as part of the Trust Fund to exceed 20% of the sum of the aggregate principal balance of the Mortgage Loans; provided, further, that such securities will not be Eligible Investments if they are published as being under review with negative implications from any Rating Agency;

(v)commercial paper (including both non-interest-bearing discount obligations and interest bearing obligations payable on demand or on a specified date not more than 180 days after the date of issuance thereof) rated by each Rating Agency in its highest short-term rating category;

(vi)a Qualified GIC;

(vii)certificates or receipts representing direct ownership interests in future interest or principal payments on obligations of the United States of America or its agencies or instrumentalities (which obligations are backed by the full faith and credit of the United States of America) held by a custodian in safekeeping on behalf of the holders of such receipts; and

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(viii)any other demand, money market, common trust fund or time deposit or obligation, or interest bearing or other security or investment, (A) rated in the highest rating category by each Rating Agency or (B) that would not adversely affect the then current rating by each Rating Agency of any of the Certificates. Such investments in this subsection (viii) may include money market mutual funds or common trust funds, including any fund for which the Trustee, the Master Servicer or an affiliate thereof serves as an investment advisor, administrator, shareholder servicing agent, and/or custodian or subcustodian, notwithstanding that (x) the Trustee, the Master Servicer or an affiliate thereof charges and collects fees and expenses from such funds for services rendered, (y) the Trustee, the Master Servicer or an affiliate thereof charges and collects fees and expenses for services rendered pursuant to this Agreement, and (z) services performed for such funds and pursuant to this Agreement may converge at any time; provided, however, that no such instrument shall be an Eligible Investment if such instrument evidences either (i) a right to receive only interest payments with respect to the obligations underlying such instrument, or (ii) both principal and interest payments derived from obligations underlying such instrument and the principal and interest payments with respect to such instrument provide a yield to maturity of greater than 120% of the yield to maturity at par of such underlying obligations.

8. A new definition of “MERS Eligible Mortgage Loan” is hereby added to Article I immediately following the definition of “MERS” to read as follows:

MERS Eligible Mortgage Loan: Any Mortgage Loan that has been designated by the Company as recordable in the name of MERS, as nominee.

9. The definition of “Mortgage Interest Rate” in Article I is hereby amended by adding the phrase “net of any Relief Act Reduction” to the end of such definition.

10. New definitions of “Non-MERS Eligible Mortgage Loan” and “Non-MERS Mortgage Loans” are hereby added to Article I immediately following the definition of “Non-Assigned Letter of Credit” to read as follows:

Non-MERS Eligible Mortgage Loan: Any Mortgage Loan other than a MERS Eligible Mortgage Loan.

Non-MERS Mortgage Loan: Any Mortgage Loan other than a MERS Mortgage Loan.

11. New definitions of “Prepayment Charge” and “Prepayment Interest Shortfall Amount” are added to Article I to immediately precede the definition of “Prepayment Penalty” and to read as follows:

Prepayment Charge: means with respect to any Mortgage Loan and Distribution Date, the charges or premiums, if any, exclusive of any servicing charges collected by the Company in connection with a Mortgage Loan payoff, due in connection with a full prepayment of such Mortgage Loan during the Principal Prepayment Period in accordance with the terms thereof (other than any Servicer Prepayment Charge Payment Amount).

Prepayment Interest Shortfall Amount: means, with respect to any Mortgage Loan that was subject to a Principal Prepayment in full or in part during any Principal Prepayment Period, which Principal Prepayment was applied to such Mortgage Loan prior to such Mortgage Loan’s Due Date in such Principal Prepayment Period, the amount of interest (net of the related Servicing Fee for Principal Prepayments in full only) that would have accrued on the amount of such Principal Prepayment during the period commencing on the date as of which such Principal Prepayment was applied to such Mortgage Loan and ending on the day immediately preceding such Due Date, inclusive.

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12. The new definition of “Qualified Depository” is hereby added to Article 1 to immediately follow the definition of “Qualified Correspondent” and to read as follows:

Qualified Depository: Any of (i) a federal or state-chartered depository institution the accounts of which are insured by the FDIC and whose commercial paper, short-term debt obligations or other short-term deposits are rated at least “A-1+” by Standard & Poor’s if the deposits are to be held in the account for less than 30 days, or whose long-term unsecured debt obligations are rated at least “AA-” by Standard & Poor’s if the deposits are to be held in the account for more than 30 days, but no more than 365 days, or (ii) the corporate trust department of a federal or state-chartered depository institution subject to regulations regarding fiduciary funds on deposit similar to Title 12 of the Code of Federal Regulations Section 9.10(b), which, in either case, has corporate trust powers, acting in its fiduciary capacity.

13. A new definition of “Realized Loss” is added to Article I immediately following the definition of “Rating Agency” to read as follows:

Realized Loss: With respect to each Liquidated Mortgage Loan (as defined in the Trust Agreement), an amount equal to (i) the unpaid principal balance of such Mortgage Loan as of the date of liquidation, minus (ii) Liquidation Proceeds received, to the extent allocable to principal, net of amounts that are reimbursable therefrom to the Master Servicer or the Company with respect to such Mortgage Loan (other than Monthly Advances of principal) including expenses of liquidation.

14. A new definition of “Relief Act Reduction” is hereby added to Article I immediately following the definition of “Regulation AB” to read as follows:

Relief Act Reduction: With respect to any Mortgage Loan as to which there has been a reduction in the amount of the interest collectible thereon as a result of the application of the Servicemembers Civil Relief Act, any amount by which interest collectible on such Mortgage Loan for the Due Date in the related Due Period is less than the interest accrued thereon for the applicable one-month period at the Mortgage Interest Rate without giving effect to such reduction.

15. The definition of “Repurchase Price” is hereby amended by adding a new clause (iii) at the end of such definition, to read as follows:

“plus (iii) any costs and damages incurred by the trust with respect to any securitization of the Mortgage Loan in connection with any violation by such Mortgage Loan of any predatory- or abusive-lending law.”

16. A new definition of “Servicer Prepayment Charge Payment Amount” is added to Article I immediately after the definition of “Servicer” to read as follows:

Servicer Prepayment Charge Payment Amount: Any amount paid by the Servicer as a result of an impermissible waiver of a Prepayment Charge pursuant to Section 4.01 of this Agreement.

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17. Section 2.01 (Conveyance of Mortgage Loans; Possession of Custodial Mortgage Files; Maintenance of Retained Mortgage File and Servicing Files) is hereby amended as follows:

(i)by deleting the first paragraph thereof and replacing the word “Purchaser” with the words “Trustee and the Trust Fund” in each instance; and

(ii)by adding the following after the word “Purchaser” in the twelfth line of the second paragraph:

or within 60 days of the occurrence of a Document Transfer Event

18. Section 2.02 (Books and Records; Transfers of Mortgage Loans) is hereby amended as follows:

(i) by replacing the reference to “Purchaser” in the first paragraph and the second sentence of the second paragraph of such section with “Trustee and the Trust Fund;” and

(ii)by adding the following paragraph as the last paragraph of such section:

Only if so requested by the Seller or the Master Servicer, the Company, at the Depositor’s expense, shall cause to be properly prepared and recorded as Assignment of Mortgage in favor of the Trustee with respect to each Non-MERS Mortgage Loan in each public recording office where such Non-MERS Mortgage Loans are recorded, as soon as practicable after the Closing Date (but in no event more than 90 days thereafter to the extent delays are caused by the applicable recording office).

19. The parties acknowledge that the fourth paragraph of Section 2.02 shall be inapplicable to this Agreement.

20. The parties acknowledge that Section 2.03 (Custodial Agreement; Delivery of Documents) shall be superseded by the provisions of the Custodial Agreement.

21. The first paragraph of Section 3.01 (Company Representations and Warranties) is hereby amended by replacing the words “to the Purchaser” with “to the Trust Fund, the Master Servicer, the Depositor and the Trustee.”

22. Section 3.01(c) (No Conflicts) is hereby amended by deleting the words “the acquisition of the Mortgage Loans by the Company, the sale of the Mortgage Loans to the Purchaser.”

23. Section 3.01(f) (Ability to Perform) is hereby amended by deleting the second and third sentences thereof.

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24. Section 3.01(h) (No Consent Required) is hereby amended by deleting the words “or the sale of the Mortgage Loans.”

25. Section 3.01 (j) (Sale Treatment), Section 3.01(l) (No Brokers’ Fees) and Section 3.01(m) (Fair Consideration) shall be inapplicable to this Agreement.

26. A new paragraph is hereby added at the end of Section 3.01 (Company Representations and Warranties) to read as follows:

It is understood and agreed that the representations and warranties set forth in Section 3.01 (a) through (i), (k), (n) and (o) shall survive the engagement of the Company to perform the servicing responsibilities hereunder and the delivery of the Servicing Files to the Company and shall inure to the benefit of the Depositor, the Trustee, the Trust Fund and the Master Servicer. Upon discovery by either the Company, the Depositor, the Master Servicer or the Trustee of a breach of any of the foregoing representations and warranties which materially and adversely affects the ability of the Company to perform its duties and obligations under this Agreement or otherwise materially and adversely affects the value of the Mortgage Loans, the Mortgaged Property or the priority of the security interest on such Mortgaged Property or the interest of the Depositor, Trustee or the Trust Fund, the party discovering such breach shall give prompt written notice to the other.

Within 60 days of the earlier of either discovery by or notice to the Company of any breach of a representation or warranty set forth in Section 3.01 which materially and adversely affects the ability of the Company to perform its duties and obligations under this Agreement or otherwise materially and adversely affects the value of the Loans, the Mortgaged Property or the priority of the security interest on such Mortgaged Property, the Company shall use its best efforts promptly to cure such breach in all material respects and, if such breach cannot be cured, the Company shall, at the Trustee’s or Master Servicer’s option, assign the Company’s rights and obligations under this Agreement (or respecting the affected Loans) to a successor servicer selected by the Master Servicer with the prior consent and approval of the Trustee (if and to the extent required under the Trust Agreement). Such assignment shall be made in accordance with Section 12.01.

In addition, the Company shall indemnify (from its own funds) the Depositor, the Trustee, the Trust Fund and Master Servicer and hold each of them harmless against any costs resulting from any claim, demand, defense or assertion based on or grounded upon, or resulting from, a breach of the Company’s representations and warranties contained in this Agreement. It is understood and agreed that the remedies set forth in this Section 3.01 constitute the sole remedies of the Depositor, the Master Servicer, the Trust Fund and the Trustee respecting a breach of the foregoing representations and warranties.

Any cause of action against the Company relating to or arising out of the breach of any representations and warranties made in Section 3.01 shall accrue upon (i) discovery of such breach by the Company or notice thereof by the Trustee or Master Servicer to the Company, (ii) failure by the Company to cure such breach within the applicable cure period, and (iii) demand upon the Company by the Depositor, the Trustee or the Master Servicer for compliance with this Agreement.

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27. Section 4.01 (Company to Act as Servicer) is hereby amended by replacing the second paragraph of such section with the following:

Consistent with the terms of this Agreement, the Company may waive, modify or vary any term of any Mortgage Loan or consent to the postponement of any such term or in any manner grant indulgence to any Mortgagor if in the Company’s reasonable and prudent determination such waiver, modification, postponement or indulgence is not materially adverse to the Purchaser, provided, however, that unless the Mortgagor is in default with respect to the Mortgage Loan or such default is, in the judgment of the Company, imminent, the Company shall not permit any modification with respect to any Mortgage Loan that would change the Mortgage Interest Rate, forgive the payment of principal or interest, reduce or increase the outstanding principal balance (except for actual payments of principal) or change the final maturity date on such Mortgage Loan. The Company shall be entitled to reimbursement for such advances to the same extent as for all other advances made pursuant to Section 5.03. Without limiting the generality of the foregoing, the Company shall continue, and is hereby authorized and empowered, to execute and deliver on behalf of itself and the Purchaser, all instruments of satisfaction or cancellation, or of partial or full release, discharge and all other comparable instruments, with respect to the Mortgage Loans and with respect to the Mortgaged Properties; provided, further, that upon the full release or discharge, the Company shall notify the related Custodian of the related Mortgage Loan of such full release or discharge. If reasonably required by the Company, the Purchaser shall furnish the Company with any powers of attorney and other documents necessary or appropriate to enable the Company to carry out its servicing and administrative duties under this Agreement. Promptly after the execution of any assumption, modification, consolidation or extension of any Mortgage Loan, the Company shall forward to the Master Servicer copies of any documents evidencing such assumption, modification, consolidation or extension. Notwithstanding anything to the contrary contained in this Agreement, the Company shall not make or permit any modification, waiver or amendment of any term of any Mortgage Loan that would cause any REMIC created under the Trust Agreement to fail to qualify as a REMIC or result in the imposition of any tax under Section 860F(a) or Section 860G(d) of the Code.

28. Section 4.04 (Establishment of and Deposits to Custodial Account) is hereby amended as follows:

(i)the words “in trust for the Purchaser and/or subsequent purchasers of Mortgage Loans - P&I” in the fourth and fifth lines of the first sentence of the first paragraph shall be replaced by the following: “in trust for LXS 2006-17 Trust Fund and various Mortgagors”.

(ii)by amending clause (viii) to read as follows:

(viii) the amount of any Prepayment Interest Shortfall Amount paid out of the Company’s own funds without any right to reimbursement therefor;

29. Section 4.05 (Permitted Withdrawals From Custodial Account) is hereby amended as follows:

(i)by replacing the last five lines of clause (ii) with the following:

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the Trust Fund; provided however, that in the event that the Company determines in good faith that any unreimbursed Monthly Advances will not be recoverable from amounts representing late recoveries of payments of principal or interest respecting the particular Mortgage Loan as to which such Monthly Advance was made or from Liquidation Proceeds or Insurance Proceeds with respect to such Mortgage Loan, the Company may reimburse itself for such amounts from the Custodial Account, it being understood, in the case of any such reimbursement, that the Company’s right thereto shall be prior to the rights of the Trust Fund; and

(ii)by amending clause (v) thereof by adding the words “Section 4.01 and” before the reference to Section 8.01.

30. Section 4.06 (Establishment of and Deposits to Escrow Account) is hereby amended by deleting the words “Purchaser and/or subsequent purchasers of Mortgage Loans, and various Mortgagors - T&I” in the fourth and fifth lines of the first sentence of the first paragraph, and replacing it with the following:

in trust for the LXS 2006-17 Trust Fund and various Mortgagors.

31. Section 4.07 (Permitted Withdrawals from Escrow Account) is hereby amended by removing the word “and” at the end of clause (viii), replacing the period at the end of clause (ix) with “; and” and adding a new clause (x) to read as follows:

(x)to transfer funds to another Eligible Institution in accordance with Section 4.09 hereof.

32. Section 4.09 (Protection of Accounts) is hereby amended as follows:

(i) by replacing the words “the Purchaser” with “the Master Servicer” in each instance;

(ii) by adding the following sentence as the last sentence of such section:

The Company shall give notice to the Master Servicer of any transfer of the Custodial Account, the Subsidy Account or the Escrow Account to a different Qualified Depository no later than 30 days after any such transfer is made and deliver to the Master Servicer, upon request, a certification notice in the form of Exhibit F or Exhibit G, as applicable, with respect to such Qualified Depository.

(iii)by adding the following paragraph as the new second paragraph of such section:

Amounts on deposit in the Custodial Account and the Escrow Account may at the option of the Servicer be invested in Eligible Investments. Any such Eligible Investment shall mature no later than the Business Day immediately preceding the related Remittance Date; provided, however, that if such Eligible Investment is an obligation of an Eligible Institution (other than the Servicer) that maintains the Custodial Account or the Escrow Account, then such Eligible Investment may mature on the related Remittance Date. Any such Eligible Investment shall be made in the name of the Servicer in trust for the benefit of the Trustee. All income on or gain realized from any such Eligible Investment shall be for the benefit of the Servicer and may be withdrawn at any time by the Servicer. Any losses incurred in respect of any such investment shall be deposited in the Custodial Account or the Escrow Account, by the Servicer out of its own funds immediately as realized.

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33. Section 4.16 (Title, Management and Disposition of REO Property) is hereby amended by (i) replacing the reference to “one year” in the seventh line of the second paragraph thereof with “three years”, (ii) adding two new paragraphs after the second paragraph thereof to read as follows:

In the event that the Trust Fund acquires any REO Property in connection with a default or imminent default on a Mortgage Loan, the Company shall dispose of such REO Property not later than the end of the third taxable year after the year of its acquisition by the Trust Fund unless the Company has applied for and received a grant of extension from the Internal Revenue Service ( and provided a copy of the same to the Master Servicer and the Trustee) to the effect that, under the REMIC Provisions and any relevant proposed legislation and under applicable state law, the applicable Trust REMIC may hold REO Property for a longer period without adversely affecting the REMIC status of such REMIC or causing the imposition of a federal or state tax upon such REMIC. If the Company has received such an extension, then the Company shall continue to attempt to sell the REO Property for its fair market value for such period longer than three years as such extension permits (the “Extended Period”). If the Company has not received such an extension and the Company is unable to sell the REO Property within the period ending 3 months before the end of such third taxable year after its acquisition by the Trust Fund or if the Company has received such an extension, and the Company is unable to sell the REO Property within the period ending three months before the close of the Extended Period, the Company shall, before the end of the three year period or the Extended Period, as applicable, (i) purchase such REO Property at a price equal to the REO Property’s fair market value or (ii) auction the REO Property to the highest bidder (which may be the Company) in an auction reasonably designed to produce a fair price prior to the expiration of the three-year period or the Extended Period, as the case may be. The Trustee shall sign any document or take any other action reasonably requested by the Company which would enable the Company, on behalf of the Trust Fund, to request such grant of extension.

Notwithstanding any other provisions of this Agreement, no REO Property acquired by the Trust Fund shall be rented (or allowed to continue to be rented) or otherwise used by or on behalf of the Trust Fund in such a manner or pursuant to any terms that would: (i) cause such REO Property to fail to qualify as “foreclosure property” within the meaning of Section 860G(a)(8) of the Code; or (ii) subject any Trust REMIC to the imposition of any federal income taxes on the income earned from such REO Property, including any taxes imposed by reason of Sections 860F or 860G(c) of the Code, unless the Company has agreed to indemnify and hold harmless the Trust Fund with respect to the imposition of any such taxes.

(iii) deleting the first sentence of the third paragraph thereto, (iv) replacing the word “sentence” with “paragraph”, in the seventh line of the third paragraph thereto, (v) replacing the word “advances” in the sixth line of the fifth paragraph thereof with “Monthly Advances,” and (vi) by adding the following to the end of such Section:

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Prior to acceptance by the Company of an offer to sell any REO Property of which the Trust Fund is the owner for a sale price that is less than 90% of the unpaid principal balance of the related Mortgage Loan, the Company shall notify the Master Servicer of such offering in writing which notification shall set forth all material terms of said offer (each a “Notice of Sale”). The Master Servicer shall be deemed to have approved the sale of any REO Property unless the Master Servicer notifies the Company in writing within two (2) Business Days after its receipt of the related Notice of Sale, that it disapproves of the related sale, in which case the Company shall not proceed with such sale; provided, however, the Master Servicer shall not take any action which would prevent the Company from disposing of any REO Property within the time period specified under the REMIC Provision of the Code.

34. Section 5.01 (Remittances) is hereby amended as follows:

(i) by adding the following after the second paragraph of such Section:

All remittances required to be made to the Master Servicer shall be made to the following wire account or to such other account as may be specified by the Master Servicer from time to time:

JPMorgan Chase Bank

New York, New York

ABA #: 021-000-021

Account Name:Aurora Loan Services LLC

Master Servicing Payment Clearing Account

Account Number: 066-611059

Beneficiary: Aurora Loan Services LLC

For further credit to: LXS 2006-17

(ii) by replacing the words “second Business Day” in the first and second sentences of the second paragraph of such section with “first Business Day.”

35. Section 5.02 (Statements to Purchaser) is hereby amended to read as follows:

Section 5.02 Statements to Master Servicer.

Not later than the tenth calendar day of each month (or if such calendar day is not a Business Day, the immediately preceding Business Day), the Company shall furnish to the Master Servicer (i) a monthly remittance advice in the format set forth in Exhibit D-1 hereto, a monthly defaulted loan report in the format set forth in Exhibit D-2 hereto (or in such other format mutually agreed to between the Company and the Master Servicer) relating to the period ending on the last day of the preceding calendar month and a monthly loan loss report in the format set forth in Exhibit D-3 hereto (or in such other format mutually agreed to between the Company and the Master Servicer) and (ii) all such information required pursuant to clause (i) above on a magnetic tape or other similar media reasonably acceptable to the Master Servicer; provided, however,the information required by Exhibit D-2 and Exhibit D-3 is limited to that which is readily available to the Company and is mutually agreed to by the Company and Master Servicer.

36. Section 6.04 (Annual Statement as to Compliance) is hereby amended as follows:

(a) replacing the words “the Purchaser and any Depositor” with “the Master Servicer and the Depositor” in each instance; and

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(b) replacing the words “the Purchaser and such Depositor” with “the Master Servicer and such Depositor” in each instance.”

37. Section 6.06 (Report on Assessment of Compliance and Attestation) is hereby amended as follows:

(a) by replacing the words “the Purchaser and any Depositor” with “the Depositor and the Master Servicer” in each instance;

(b) by replacing the words “the Purchaser and such Depositor” with “the Depositor and such Master Servicer” in each instance;

(c) by replacing the words “delivered to the Purchaser” with “delivered to the Depositor and the Master Servicer”;

(d) by replacing the words “deliver to the Purchaser, any Depositor” with “deliver to the Depositor and the Master Servicer”; and

(e) the last sentence of subsection (i) is hereby replaced with “Such report shall be addressed to the Master Servicer and such Depositor and signed by an authorized officer of the Company, and shall address each of the Servicing Criteria specified in Exhibit H hereto.”

38. Section 8.01 (Indemnification; Third Party Claims) is hereby amended in its entirety to read as follows:

The Company shall indemnify Lehman Brothers Bank, FSB, the Depositor, the Trust Fund, the Trustee and the Master Servicer and hold each of them harmless against any and all claims, losses, damages, penalties, fines, forfeitures, reasonable and necessary legal fees and related costs, judgments, and any other costs, fees and expenses that any of such parties may sustain in any way related to the failure of the Company to perform its duties and service the Mortgage Loans in strict compliance with the terms of this Agreement (including, but not limited to its obligations to provide any information, report, certification, accountants’ letter or other material pursuant to Sections 6.04 and 6.06 hereunder) or for any inaccurate or misleading information provided pursuant to Sections 6.04 and 6.06 hereunder. The Company immediately shall notify Lehman Brothers Bank, FSB, the Master Servicer and the Trustee or any other relevant party if a claim is made by a third party with respect to this Agreement or the Mortgage Loans, assume (with the prior written consent of the indemnified party, which consent shall not be unreasonably withheld or delayed) the defense of any such claim and pay all expenses in connection therewith, including counsel fees, and promptly pay, discharge and satisfy any judgment or decree which may be entered against it or any of such parties in respect of such claim. The Company shall follow any written instructions received from the Master Servicer or the Trustee in connection with such claim. The Company shall provide the Trustee (with a copy to the Master Servicer) with a written report of all expenses and advances incurred by the Company pursuant to this Section 8.01, and the Trustee (after consultation with the Master Servicer) from the assets of the Trust Fund promptly shall reimburse the Company for all amounts advanced by it pursuant to the preceding sentence except when the claim is in any way relates to the failure of the Company to service and administer the Mortgage Loans in strict compliance with the terms of this Agreement or the gross negligence, bad faith or willful misconduct of this Company.

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39. Subsection (c) of Section 9.01 (Removal of Mortgage Loans from Inclusion Under this Agreement Upon the Securitization Transaction), other than the last sentence thereof, shall be inapplicable to this Agreement.

40. Section 9.01 (Removal of Mortgage Loans from Inclusion Under this Agreement Upon the Securitization Transaction) is hereby amended by:

(a) subsection (e) is hereby amended by (1) changing the reference to “the Purchaser, each affiliate of the Purchaser” to “the Trust Fund, the Master Servicer, the Depositor and the Trustee,” (2) deleting the reference to “or the Depositor,” and (3) deleting the reference to “and the Depositor”;

(b) changing any reference to “Purchaser” to “Master Servicer” in each instance in subsections (d) and (e) and the last four paragraphs of Section 9.01;

(c) subsection (d)(i)(D) is hereby replaced with “a description of any affiliation or relationship (of a type described in Item 1119 of Regulation AB) between the Company, each Third-Party Originator, each Subservicer and any of the parties listed on Exhibit L hereto";

(d) subsection (d)(vi)(A)(7) is hereby replaced with “there are no affiliations, relationships or transactions relating to the Company, any Subservicer or any Third-Party Originator with respect to any Securitization Transaction and any party listed on Exhibit L hereto, other than Wells Fargo Bank, N.A., as one of custodian."

41. Section 10.01 (Events of Default) is hereby amended by:

(a) changing any reference to “Purchaser” to “Master Servicer”;

(b) changing the reference to “five (5) days” to “two (2) Business Days” in clause (i); and

(c) adding the words “within the applicable cure period” after the word “remedied” in the first line of the second paragraph.

42. Section 10.02 (Waiver of Defaults) is hereby amended by changing the reference to “Purchaser” to “Master Servicer with the prior written consent of the Trustee”.

43. Section 11.01 (Termination) is hereby amended by restating subclause (ii) thereof to read as below and adding the following sentence after the first sentence of Section 11.01:

(ii) mutual consent of the Company and the Master Servicer in writing, provided such termination is also acceptable to the Trustee and the Rating Agencies.

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At the time of any termination of the Company pursuant to Section 11.01, the Company shall be entitled to all accrued and unpaid Servicing Fees and unreimbursed Servicing Advances and Monthly Advances; provided, however, in the event of a termination for cause under Sections 10.01 hereof, such unreimbursed amounts shall not be reimbursed to the Company until such amounts are received by the Trust Fund from the related Mortgage Loans.

44. Section 11.02 (Termination Without Cause) is hereby amended by replacing the first reference to “Purchaser” with “Lehman Brothers Bank, FSB (with the prior consent of the Trustee)” and by replacing all other references to “Purchaser” with “Lehman Brothers Bank, FSB.”

45. Section 12.01 (Successor to Company) is hereby amended in its entirety to read as follows:

Simultaneously with the termination of the Company’s responsibilities and duties under this Agreement pursuant to Sections 8.04, 10.01, 11.01(ii) or 11.02, the Master Servicer shall, in accordance with the provisions of the Trust Agreement (i) succeed to and assume all of the Company’s responsibilities, rights, duties and obligations under this Agreement, or (ii) appoint a successor meeting the eligibility requirements of this Agreement, and which shall succeed to all rights and assume all of the responsibilities, duties and liabilities of the Company under this Agreement with the termination of the Company’s responsibilities, duties and liabilities under this Agreement. Any successor to the Company that is not at that time a servicer of other mortgage loans for the Trust Fund shall be subject to the approval of the Master Servicer, Lehman Brothers Bank, FSB, the Trustee and each Rating Agency (as such term is defined in the Trust Agreement). Unless the successor servicer is at that time a servicer of other mortgage loans for the Trust Fund, each Rating Agency must deliver to the Trustee a letter to the effect that such transfer of servicing will not result in a qualification, withdrawal or downgrade of the then-current rating of any of the Certificates. In connection with such appointment and assumption, the Master Servicer or Lehman Brothers Bank, FSB, as applicable, may make such arrangements for the compensation of such successor out of payments on the Mortgage Loans as it and such successor shall agree; provided, however, that no such compensation shall be in excess of that permitted the Company under this Agreement. In the event that the Company’s duties, responsibilities and liabilities under this Agreement should be terminated pursuant to the aforementioned sections, the Company shall discharge such duties and responsibilities during the period from the date it acquires knowledge of such termination until the effective date thereof with the same degree of diligence and prudence which it is obligated to exercise under this Agreement, and shall take no action whatsoever that might impair or prejudice the rights or financial condition of its successor. The resignation or removal of the Company pursuant to the aforementioned sections shall not become effective until a successor shall be appointed pursuant to this Section 12.01 and shall in no event relieve the Company of the representations and warranties made pursuant to Sections 3.01 and 3.02 and the remedies available to the Trust Fund under Section 3.03 shall be applicable to the Company notwithstanding any such resignation or termination of the Company, or the termination of this Agreement.

Within a reasonable period of time, but in no event longer than 30 days of the appointment of a successor entity, the Company shall prepare, execute and deliver to the successor entity any and all documents and other instruments, place in such successor’s possession all Servicing Files, and do or cause to be done all other acts or things necessary or appropriate to effect the purposes of such notice of termination. The Company shall cooperate with the Trustee and the Master Servicer, as applicable, and such successor in effecting the termination of the Company’s responsibilities and rights hereunder and the transfer of servicing responsibilities to the successor servicer, including without limitation, the transfer to such successor for administration by it of all cash amounts which shall at the time be credited by the Company to the Account or any Escrow Account or thereafter received with respect to the Mortgage Loans.

A-13

Any successor appointed as provided herein shall execute, acknowledge and deliver to the Trustee, the Company and the Master Servicer an instrument (i) accepting such appointment, wherein the successor shall make an assumption of the due and punctual performance and observance of each covenant and condition to be performed and observed by the Company under this Agreement, whereupon such successor shall become fully vested with all the rights, powers, duties, responsibilities, obligations and liabilities of the Company, with like effect as if originally named as a party to this Agreement. Any termination or resignation of the Company or termination of this Agreement pursuant to Sections 8.04, 10.01, 11.01 or 11.02 shall not affect any claims that the Master Servicer or the Trustee may have against the Company arising out of the Company’s actions or failure to act prior to any such termination or resignation.

The Company shall deliver, within three (3) Business Days of the appointment of a successor servicer, the funds in the Custodial Account and Escrow Account and all Collateral Files, Credit Files and related documents and statements held by it hereunder to the successor servicer and the Company shall account for all funds and shall execute and deliver such instruments and do such other things as may reasonably be required to more fully and definitively vest in the successor all such rights, powers, duties, responsibilities, obligations and liabilities of the Company.

Upon a successor’s acceptance of appointment as such, the Company shall notify the Trustee and Master Servicer of such appointment in accordance with the notice procedures set forth herein.

Except as otherwise provided in this Agreement, all reasonable costs and expenses incurred in connection with any transfer of servicing hereunder (whether as a result of termination or removal of the Company or resignation of the Company or otherwise), including, without limitation, the costs and expenses of the Master Servicer or any other Person in appointing a successor servicer, or of the Master Servicer in assuming the responsibilities of the Company hereunder, or of transferring the Servicing Files and the other necessary data to the successor servicer shall be paid by the terminated, removed or resigning Company from its own funds without reimbursement.

46. Section 12.02 (Amendment) is hereby amended by replacing the words “by written agreement signed by the Company and the Purchaser” with “by written agreement signed by the Company and Lehman Brothers Bank, FSB, with the written consent of the Master Servicer and the Trustee”.

47. Section 12.04 (Duration of Agreement) is hereby amended by deleting the last sentence thereof.

48. Section 12.05 (Notices) is hereby amended by replacing the Servicer’s address with the following:

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(i)If to the Company with respect to servicing or investor reporting issues:

Wells Fargo Bank, N.A.

1 Home Campus

Des Moines, IA 50328-0001

Attention: John B. Brown, MAC X2302-033

Fax: 515/324-3118

If to the Company with respect to all other issues:

Wells Fargo Bank, N.A.

7430 New Technology Way

Frederick, MD 21703

Attention: Structured Finance Manager, MAC X3906-012

Fax: 301/846-8152

In each instance with a copy to:

Wells Fargo Bank, N.A.

1 Home Campus

Des Moines, Iowa 50328-0001

Attention: General Counsel, MAC # X2401-06T

Fax: 515/213-5192

or such other address as may hereafter be furnished to the Purchaser in writing by the Company;

49. Section 12.10 (Assignment by Purchaser) is hereby deleted in its entirety.

50. Section 12.11 (Solicitation of Mortgagor) is hereby amended by replacing the words “the Purchaser” with “Lehman Brothers Bank, FSB” in each instance.

51. A new Section 12.12 (Intended Third Party Beneficiaries) is hereby added to the Master SWSA to read as follows:

Section 12.12Intended Third Party Beneficiaries. Notwithstanding any provision herein to the contrary, the parties to this Agreement agree that it is appropriate, in furtherance of the intent of such parties as set forth herein, that the Trust Fund, Master Servicer, the Depositor and the Trustee receive the benefit of the provisions of this Agreement as intended third party beneficiaries of this Agreement to the extent of such provisions. The Company shall have the same obligations to the Trust Fund, the Master Servicer, the Depositor and the Trustee as if they were parties to this Agreement, and the Trust Fund, the Master Servicer, the Depositor and the Trustee shall have the same rights and remedies to enforce the provisions of this Agreement as if they were parties to this Agreement. The Company shall only take direction from the Master Servicer (if direction by the Master Servicer is required under this Agreement) unless otherwise directed by this Agreement. Notwithstanding the foregoing, all rights and obligations of the Trust Fund, the Master Servicer, the Depositor and the Trustee hereunder (other than the right to indemnification) shall terminate upon termination of the Trust Agreement and of the Trust Fund pursuant to the Trust Agreement.

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52. Exhibit D-3 (Form of Loan Loss Report) is hereby added to the Master SWSA.

53. Exhibit L (Transaction Parties) is hereby added to the Master SWSA.

A-16

EXHIBIT B-1

Trust Agreement

B-1

EXHIBIT B-2

Assignment and Assumption Agreement

B-2

EXHIBIT C

Master Seller’s Warranties and Servicing Agreement, as amended, dated May 1, 2006

Assignment and Conveyance Agreement (06-W64), dated July 28, 2006

Assignment and Conveyance Agreement (06-W86), dated October 26, 2006.

C-1

Exhibit D-1

MONTHLY REMITTANCE ADVICE

FIELD NAME	DESCRIPTION	FORMAT
Article I.
INVNUM	INVESTOR LOAN NUMBER	Number no decimals
SERVNUM	SERVICER LOAN NUMBER, REQUIRED	Number no decimals
BEGSCHEDBAL	BEGINNING SCHEDULED BALANCE FOR SCHED/SCHED	Number two decimals
	BEGINNING TRAIL BALANCE FOR ACTUAL/ACTUAL,
	REQUIRED
SCHEDPRIN	SCHEDULED PRINCIPAL AMOUNT FOR SCHEDULED/SCHEDULED	Number two decimals
	ACTUAL PRINCIPAL COLLECTED FOR ACTUAL/ACTUAL,
	REQUIRED, .00 IF NO COLLECTIONS
CURT1	CURTAILMENT 1 AMOUNT, .00 IF NOT APPLICABLE	Number two decimals
CURT1DATE	CURTAILMENT 1 DATE, BLANK IF NOT APPLICABLE	DD-MMM-YY
CURT1ADJ	CURTAILMENT 1 ADJUSTMENT, .00 IF NOT APPLICABLE	Number two decimals
CURT2	CURTAILMENT 2 AMOUNT, .00 IF NOT APPLICABLE	Number two decimals
CURT2DATE	CURTAILMENT 2 DATE, BLANK IF NOT APPLICABLE	DD-MMM-YY
CURT2ADJ	CURTAILMENT 2 ADJUSTMENT, .00 IF NOT APPLICABLE	Number two decimals
LIQPRIN	PAYOFF, LIQUIDATION PRINCIPAL, .00 IF NOT APPLICABLE	Number two decimals
OTHPRIN	OTHER PRINCIPAL, .00 IF NOT APPLICABLE	Number two decimals
PRINREMIT	TOTAL PRINCIPAL REMITTANCE AMOUNT, .00 IF NOT APPLICABLE	Number two decimals
INTREMIT	NET INTEREST REMIT, INCLUDE PAYOFF INTEREST,	Number two decimals
	.00 IF NOT APPLICABLE
TOTREMIT	TOTAL REMITTANCE AMOUNT, .00 IF NOT APPLICABLE	Number two decimals
ENDSCHEDBAL	ENDING SCHEDULED BALANCE FOR SCHEDULED/SCHEDULED	Number two decimals
	ENDING TRIAL BALANCE FOR ACTUAL/ACTUAL
	.00 IF PAIDOFF, LIQUIDATED OR FULL CHARGEOFF
ENDACTBAL	ENDING TRIAL BALANCE	Number two decimals
	.00 IF PAIDOFF, LIQUIDATED OR FULL CHARGEOFF
ENDDUEDATE	ENDING ACTUAL DUE DATE, NOT LAST PAID INSTALLMENT	DD-MMM-YY
ACTCODE	BLANK IF NOT APPLICABLE	Number no decimals
ACTDATE	ACTUAL PAYOFF DATE, BLANK IF NOT APPLICABLE	DD-MMM-YY
INTRATE	INTEREST RATE, REQUIRED	Number seven decimals
		Example .0700000 for 7.00%
SFRATE	SERVICE FEE RATE, REQUIRED	Number seven decimals
		Example .0025000 for .25%
PTRATE	PASS THRU RATE, REQUIRED	Number seven decimals
		Example .0675000 for 6.75%

D-1-1

PIPMT	P&I CONSTANT, REQUIRED	Number two decimals
	.00 IF PAIDOFF

D-1-2

Exhibit D-2

STANDARD LAYOUT FOR MONTHLY DEFAULTED LOAN REPORT

Data Field	Format			Data Description
% of MI coverage	NUMBER(6,5)			The percent of coverage provided by the PMI company in the event of loss on a defaulted loan.
Actual MI claim filed date	DATE(MM/DD/YYYY)			Actual date that the claim was submitted to the PMI company.
Actual bankruptcy start date	DATE(MM/DD/YYYY)			Actual date that the bankruptcy petition is filed with the court.
Actual MI claim amount filed	NUMBER(15,2)			The amount of the claim that was filed by the servicer with the PMI company.
Actual discharge date	DATE(MM/DD/YYYY)			Actual date that the Discharge Order is entered in the bankruptcy docket.
Actual due date	DATE(MM/DD/YYYY)			Actual due date of the next outstanding payment amount due from the mortgagor.
Actual eviction complete date	DATE(MM/DD/YYYY)			Actual date that the eviction proceedings are completed by local counsel.
Actual eviction start date	DATE(MM/DD/YYYY)			Actual date that the eviction proceedings are commenced by local counsel.
Actual first legal date	DATE(MM/DD/YYYY)			Actual date that foreclosure counsel filed the first legal action as defined by state statute.
Actual redemption end date	DATE(MM/DD/YYYY)			Actual date that the foreclosure redemption period expires.
Bankruptcy chapter	VARCHAR2(2)	7= Chapter 7 filed 12= Chapter 12 filed	11= Chapter 11 filed 13= Chapter 13 filed	Chapter of bankruptcy filed.
Bankruptcy flag	VARCHAR2(2)	Y=Active Bankruptcy	N=No Active Bankruptcy	Servicer defined indicator that identifies that the property is an asset in an active bankruptcy case.
Bankruptcy Case Number	VARCHAR2(15)			The court assigned case number of the bankruptcy filed by a party with interest in the property.

D-2-1

MI claim amount paid	NUMBER(15,2)			The amount paid to the servicer by the PMI company as a result of submitting an MI claim.
MI claim funds received date	DATE(MM/DD/YYYY)			Actual date that funds were received from the PMI company as a result of transmitting an MI claim.
Current loan amount	NUMBER(10,2)			Current unpaid principal balance of the loan as of the date of reporting to Aurora Master Servicing.
Date FC sale scheduled	DATE(MM/DD/YYYY)			Date that the foreclosure sale is scheduled to be held.
Date relief/dismissal granted	DATE(MM/DD/YYYY)			Actual date that the dismissal or relief from stay order is entered by the bankruptcy court.
Date REO offer accepted	DATE(MM/DD/YYYY)			Actual date of acceptance of an REO offer.
Date REO offer received	DATE(MM/DD/YYYY)			Actual date of receipt of an REO offer.
Delinquency value	NUMBER(10,2)			Value obtained typically from a BPO prior to foreclosure referral not related to loss mitigation activity.
Delinquency value source	VARCHAR2(15)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Name of vendor or management company that provided the delinquency valuation amount.
Delinquency value date	DATE(MM/DD/YYYY)			Date that the delinquency valuation amount was completed by vendor or property management company.
Delinquency flag	VARCHAR2(2)	Y= 90+ delinq. Not in FC, Bky or Loss mit	N=Less than 90 days delinquent	Servicer defined indicator that identifies that the loan is delinquent but is not involved in loss mitigation, foreclosure, bankruptcy or REO.
Foreclosure flag	VARCHAR2(2)	Y=Active foreclosure	N=No active foreclosure	Servicer defined indicator that identifies that the loan is involved in foreclosure proceedings.
Corporate expense balance	NUMBER(10,2)			Total of all cumulative expenses advanced by the servicer for non-escrow expenses such as but not limited to: FC fees and costs, bankruptcy fees and costs, property preservation and property inspections.

D-2-2

Foreclosure attorney referral date	DATE(MM/DD/YYYY)			Actual date that the loan was referred to local counsel to begin foreclosure proceedings.
Foreclosure valuation amount	NUMBER(15,2)			Value obtained during the foreclosure process. Usually as a result of a BPO and typically used to calculate the bid.
Foreclosure valuation date	DATE(MM/DD/YYYY)			Date that foreclosure valuation amount was completed by vendor or property management company.
Foreclosure valuation source	VARCHAR2(80)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Name of vendor or management company that provided the foreclosure valuation amount.
FHA 27011A transmitted date	DATE(MM/DD/YYYY)			Actual date that the FHA 27011A claim was submitted to HUD.
FHA 27011 B transmitted date	DATE(MM/DD/YYYY)			Actual date that the FHA 27011B claim was submitted to HUD.
VA LGC/ FHA Case number	VARCHAR2(15)			Number that is assigned individually to the loan by either HUD or VA at the time of origination. The number is located on the Loan Guarantee Certificate (LGC) or the Mortgage Insurance Certificate (MIC).
FHA Part A funds received date	DATE(MM/DD/YYYY)			Actual date that funds were received from HUD as a result of transmitting the 27011A claim.
Foreclosure actual sale date	DATE(MM/DD/YYYY)			Actual date that the foreclosure sale was held.
Servicer loan number	VARCHAR2(15)			Individual number that uniquely identifies loan as defined by servicer.
Loan type	VARCHAR2(2)	1=FHA Residential 3=Conventional w/o PMI 5=FHA Project 7=HUD 235/265 9=Farm Loan S=Sub prime	2=VA Residentia 4=Commercial 6=Conventional w/PMI 8=Daily Simple Interest Loan U=Unknown	Type of loan being serviced generally defined by the existence of certain types of insurance (i.e.: FHA, VA, conventional insured, conventional uninsured, SBA, etc.).
Loss mit approval date	DATE(MM/DD/YYYY)			The date determined that the servicer and mortgagor agree to pursue a defined loss mitigation alternative.

D-2-3

Loss mit flag	VARCHAR2(2)	Y= Active loss mitigation	N=No active loss mitigation	Servicer defined indicator that identifies that the loan is involved in completing a loss mitigation alternative.
Loss mit removal date	DATE(MM/DD/YYYY)			The date that the mortgagor is denied loss mitigation alternatives or the date that the loss mitigation alternative is completed resulting in a current or liquidated loan.
Loss mit type	VARCHAR2(2)	L= Loss Mitigation NP=Pending non-performing sale DI= Deed in lieu MO=Modification SH=Short sale	LT=Litigation pending CH= Charge off FB= Forbearance plan PC=Partial claim VA=VA refunding	The defined loss mitigation alternative identified on the loss mit approval date.
Loss mit value	NUMBER(10,2)			Value obtained typically from a BPO prior to foreclosure sale intended to aid in the completion of loss mitigation activity.
Loss mit value date	DATE(MM/DD/YYYY)			Name of vendor or management company that provided the loss mitigation valuation amount.
Loss mit value source	VARCHAR2(15)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Date that the loss mitigation valuation amount was completed by vendor or property management company.
MI certificate number	VARCHAR2(15)			A number that is assigned individually to the loan by the PMI company at the time of origination. Similar to the VA LGC/FHA Case Number in purpose.
LPMI Cost	NUMBER(7,7)			The current premium paid to the PMI company for Lender Paid Mortgage Insurance.
Occupancy status	VARCHAR2(1)	O=Owner occupied U=Unknown	T=Tenant occupied V=Vacant	The most recent status of the property regarding who if anyone is occupying the property. Typically a result of a routine property inspection.
First Vacancy date/ Occupancy status date	DATE(MM/DD/YYYY)			The date that the most recent occupancy status was determined. Typically the date of the most recent property inspection.
Original loan amount	NUMBER(10,2)			Amount of the contractual obligations (i.e.: note and mortgage/deed of trust).

D-2-4

Original value amount	NUMBER(10,2)			Appraised value of property as of origination typically determined through the appraisal process.
Origination date	DATE(MM/DD/YYYY)			Date that the contractual obligations (i.e.: note and mortgage/deed of trust) of the mortgagor was executed.
FHA Part B funds received date	DATE(MM/DD/YYYY)			Actual date that funds were received from HUD as a result of transmitting the 27011B claim.
Post petition due date	DATE(MM/DD/YYYY)			The post petition due date of a loan involved in a chapter 13 bankruptcy.
Property condition	VARCHAR2(2)	1= Excellent 3=Average 5=Poor	2=Good 4=Fair 6=Very poor	Physical condition of the property as most recently reported to the servicer by vendor or property management company.
Property type	VARCHAR2(2) 3=Condo 6=Prefabricated 7=Mobile home A=Church O=Co-op CT=Condotel	1=Single family 4=Multifamily B=Commercial U=Unknown P=PUD M=Manufactured housing MU=Mixed use	2=Town house 5=Other C=Land only D=Farm R=Row house 24= 2-4 family	Type of property secured by mortgage such as: single family, 2-4 unit, etc.
Reason for default	VARCHAR2(3)	001=Death of principal mtgr 003=Illness of mtgr's family member 004=Death of mtgr's family member 006=Curtailment of income 008=Abandonment of property 011=Property problem 013=Inability to rent property 015=Other 017=Business failure 022=Energy-Environment costs 026= Payment adjustment 029=Transfer ownership pending 031=Unable to contact borrower	002=Illness of principal mtgr 005=Marital difficulties 007=Excessive obligations 009=Distant employee transfer 012=Inability to sell property 014=Military service 016=Unemployment 019=Casualty loss 023= Servicing problems 027=Payment dispute 030=Fraud INC=Incarceration	Cause of delinquency as identified by mortgagor.
REO repaired value	NUMBER(10,2)			The projected value of the property that is adjusted from the "as is" value assuming necessary repairs have been made to the property as determined by the vendor/property management company.

D-2-5

REO list price adjustment amount	NUMBER(15,2)			The most recent listing/pricing amount as updated by the servicer for REO properties.
REO list price adjustment date	DATE(MM/DD/YYYY)			The most recent date that the servicer advised the agent to make an adjustment to the REO listing price.
REO value (as is)	NUMBER(10,2)			The value of the property without making any repairs as determined by the vendor/property management company.
REO actual closing date	DATE(MM/DD/YYYY)			The actual date that the sale of the REO property closed escrow.
REO flag	VARCHAR2(7)	Y=Active REO	N=No active REO	Servicer defined indicator that identifies that the property is now Real Estate Owned.
REO original list date	DATE(MM/DD/YYYY)			The initial/first date that the property was listed with an agent as an REO.
REO original list price	NUMBER(15,2)			The initial/first price that was used to list the property with an agent as an REO.
REO net sales proceeds	NUMBER(10,2)			The actual REO sales price less closing costs paid. The net sales proceeds are identified within the HUD1 settlement statement.
REO sales price	NUMBER(10,2)			Actual sales price agreed upon by both the purchaser and servicer as documented on the HUD1 settlement statement.
REO scheduled close date	DATE(MM/DD/YYYY)			The date that the sale of the REO property is scheduled to close escrow.
REO value date	DATE(MM/DD/YYYY)			Date that the vendor or management company completed the valuation of the property resulting in the REO value (as is).
REO value source	VARCHAR2(15)	BPO= Broker's Price Opinion	Appraisal=Appraisal	Name of vendor or management company that provided the REO value (as is).
Repay first due date	DATE(MM/DD/YYYY)			The due date of the first scheduled payment due under a forbearance or repayment plan agreed to by both the mortgagor and servicer.
Repay next due date	DATE(MM/DD/YYYY)			The due date of the next outstanding payment due under a forbearance or repayment plan agreed to by both the mortgagor and servicer.

D-2-6

Repay plan broken/ reinstated/ closed date	DATE(MM/DD/YYYY)	The servicer defined date upon which the servicer considers that the plan is no longer in effect as a result of plan completion or mortgagor's failure to remit payments as scheduled.
Repay plan created date	DATE(MM/DD/YYYY)	The date that both the mortgagor and servicer agree to the terms of a forbearance or repayment plan.
SBO loan number	NUMBER(9)	Individual number that uniquely identifies loan as defined by Aurora Master Servicing.
Escrow balance/advance balance	NUMBER(10,2)	The positive or negative account balance that is dedicated to payment of hazard insurance, property taxes, MI, etc. (escrow items only).
Title approval letter received date	DATE(MM/DD/YYYY)	The actual date that the title approval was received as set forth in the HUD title approval letter.
Title package HUD/VA date	DATE(MM/DD/YYYY)	The actual date that the title package was submitted to either HUD or VA.
VA claim funds received date	DATE(MM/DD/YYYY)	The actual date that funds were received by the servicer from the VA for the expense claim submitted by the servicer.
VA claim submitted date	DATE(MM/DD/YYYY)	The actual date that the expense claim was submitted by the servicer to the VA.
VA first funds received amount	NUMBER(15,2)	The amount of funds received by the servicer from VA as a result of the specified bid.
VA first funds received date	DATE(MM/DD/YYYY)	The date that the funds from the specified bid were received by the servicer from the VA.
VA NOE submitted date	DATE(MM/DD/YYYY)	Actual date that the Notice of Election to Convey was submitted to the VA.
Zip Code	VARCHAR2(5)	U.S. postal zip code that corresponds to property location.

D-2-7

FNMA Delinquency status code	VARCHAR2(3) 24=Drug seizure 28=Modification 31=Probate 44=Deed-in-lieu 62=VA no-bid 65=Ch. 7 bankruptcy	09=Forbearance 26=Refinance 29=Charge-off 32=Military indulgence 49=Assignment 63=VA Refund 66=Ch. 11 bankruptcy	17=Preforeclosure sale 27=Assumption 30=Third-party sale 43=Foreclosure 61=Second lien considerations 64=VA Buydown 67=Ch. 13 bankruptcy	The code that is electronically reported to FNMA by the servicer that reflects the current defaulted status of a loan (i.e.: 65, 67, 43 or 44).
FNMA delinquency reason code	VARCHAR2(3)	001=Death of principal mtgr 003=Illness of mtgr's family member 005=Marital difficulties 007=Excessive obligations 009=Distant employee transfer 012=Inability to sell property 014=Military service 016=Unemployment 019=Casualty loss 023= Servicing problems 027=Payment dispute 030=Fraud INC=Incarceration	002=Illness of principal mtgr 004=Death of mtgr's family member 006=Curtailment of income 008=Abandonment of property 011=Property problem 013=Inability to rent property 015=Other 017=Business failure 022=Energy-Environment costs 026= Payment adjustment 029=Transfer ownership pending 031=Unable to contact borrower	The code that is electronically reported to FNMA by the servicer that describes the circumstance that appears to be the primary contributing factor to the delinquency.
Suspense balance	NUMBER(10,2)			Money submitted to the servicer, credited to the mortgagor's account but not allocated to principal, interest, escrow, etc.
Restricted escrow balance	NUMBER(10,2)			Money held in escrow by the mortgage company through completion of repairs to property.
Investor number	NUMBER (10,2)			Unique number assigned to a group of loans in the servicing system.

D-2-8

EXHIBIT D-3

FORM OF LOAN LOSS REPORT

Final Report Field Heading	Definition	Format
Servicer Cut Off Date	Reporting cycle cut off date	DATE(MM/DD/YYYY)
Servicer Loan Number	Individual number that uniquely identifies loan as defined by servicer.	VARCHAR2(15)
Investor Loan Number	Individual number that uniquely identifies loan as defined by Aurora Master Servicing.	NUMBER(9)
Servicer Customer Number	Unique number assigned to each servicer	NUMBER(3)
Investor ID	Unique number assigned to a group of loans in the servicing system.	NUMBER (10,2)
Resolution Type	Description of the process to resolve the delinquency. Ex. Foreclosure, Short Sale, Third Party Sale, Deed In Lieu, etc.	VARCHAR2(15)
Resolution Date	Date the process described in Resolution Type was completed.	DATE(MM/DD/YYYY)
Liquidation Date	Date the loan was liquidated on the servicers servicing system.	DATE(MM/DD/YYYY)
REO Sale Date	Actual date that the sale of the REO property closed escrow.	DATE(MM/DD/YYYY)
Title Date	Date clear title was recorded.	DATE(MM/DD/YYYY)
MI Percent	Percent of coverage provided by the PMI company in the event of loss on a defaulted loan.	NUMBER(6,5)
First Legal Date	Actual date that foreclosure counsel filed the first legal action as defined by state statute.	DATE(MM/DD/YYYY)
Bankruptcy 1 Filing Date	Actual date the bankruptcy petition is filed with the court.	DATE(MM/DD/YYYY)
Bankruptcy 1 Relief Date	Actual date the Discharge, Dismissal or Relief Order is entered in the bankruptcy docket.	DATE(MM/DD/YYYY)
Bankruptcy 2 Filing Date	Actual date the bankruptcy petition is filed with the court.	DATE(MM/DD/YYYY)
Bankruptcy 2 Relief Date	Actual date the Discharge, Dismissal or Relief Order is entered in the bankruptcy docket.	DATE(MM/DD/YYYY)

D-3-1

Foreclosure Fees	Amount paid to the Foreclosure Attorney for performing his service.	NUMBER(10,2)
Foreclosure Costs	Amount incurred as part of the foreclosure process.	NUMBER(10,2)
Bankruptcy Costs	Amount incurred related to a bankruptcy filing involving the borrower or subject property.	NUMBER(10,2)
Eviction Costs	Amount incurred related to the eviction process.	NUMBER(10,2)
Appraisal Costs	Amount incurred to acquire a value for the subject property.	NUMBER(10,2)
Preservation Costs	Amount incurred to preserve and secure the property.	NUMBER(10,2)
Utility Costs	Amount incurred for utilities at the property.	NUMBER(10,2)
HOA Costs	Amount paid to the Home Owners Association to maintain the property dues.	NUMBER(10,2)
Other Costs	Amount of Miscellaneous Expenses incurred during the default process.	NUMBER(10,2)
Interest on Advances	Interest paid by HUD/VA or MI on the amounts advanced related to the liquidation of the property.	NUMBER(10,2)
Hazard Refunds	Amount of refunds of Hazard Premiums paid.	NUMBER(10,2)
Real Estate Taxes	Amount of any taxes paid during the default process.	NUMBER(10,2)
Hazard Premiums	Amount paid for Hazard Insurance on the property held as collateral for the mortgage.	NUMBER(10,2)
MI Premiums	Amount paid for Mortgage Insurance related to the mortgage loan.	NUMBER(10,2)
Other Escrow	Miscellaneous Expenses incurred from the escrow account during the default process.	NUMBER(10,2)
Sales Proceeds	Funds received in connection with the sale of the property held as collateral for the mortgage loan (Positive Number).	NUMBER(10,2)
Initial Claim Proceeds	Funds received in connection with the conveyance of the property to the insuring agency (Positive Number).	NUMBER(10,2)
Final Claim Proceeds	Claim funds received from the insuring agency (HUD/VA).	NUMBER(10,2)

D-3-2

Other Proceeds	Miscellaneous funds received in connection with the property held as collateral for the mortgage loan (Positive Number).	NUMBER(10,2)
Escrow Balance	Any positive balance remaining in the escrow account.	NUMBER(10,2)
Replacement Reserve Bal	Amount of funds held in the Replacement Reserve account (Positive Number).	NUMBER(10,2)
Restricted Escrow Bal	Amount of funds held in the Restricted Escrow account.	NUMBER(10,2)
Suspense Balance	Amount of funds held in the Suspense account (Positive Number).	NUMBER(10,2)
Servicer Retained Loss	The total amount of the Gross Final Actual (Loss)/Gain the servicer will take, due to Interest/Expense Curtailments by HUD/VA (This would include Advances not claimed to HUD/VA or MI due to servicer error) (Positive Number).	NUMBER(10,2)

D-3-3

EXHIBIT L

TRANSACTION PARTIES

Sponsor and Seller: Lehman Brothers Holdings Inc.

Depositor: Structured Asset Securities Corporation

Trustee: Citibank, N.A.

Securities Administrator: None

Master Servicer: Aurora Loan Services LLC

Credit Risk Manager: None

PMI Insurer(s): PMI Mortgage Insurance Co. and Mortgage Guaranty Insurance Corporation

Certificate Insurer: MBIA Insurance Corporation

Interest Rate Swap Counterparty: IXIS Financial Products Inc.

Interest Rate Cap Counterparty: Lehman Brothers Specialty Financing Inc.

Servicer(s): Aurora Loan Services LLC, Countrywide Home Loans Servicing LP, IndyMac Bank, F.S.B and Wells Fargo Bank, N.A.

Originator(s): Lehman Brothers Bank, IndyMac Bank, F.S.B. and Wells Fargo Bank, N.A.

Custodian(s): U.S. Bank National Association, LaSalle Bank National Association, Deutsche Bank National Trust Company and Wells Fargo Bank, N.A.

L-1-1

SCHEDULE I

Wells Fargo Bank, N.A.

[To be retained in a separate closing binder entitled “LXS 2006-17 Mortgage Loan Schedules” at the Washington, DC offices of McKee Nelson LLP]

Schedule I