UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT
TO SECTION 13 OR 15 (d) OF THE
SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): September 28, 2006

CSK AUTO CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	001-13927	86-0765798
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

645 E. Missouri Ave. Suite 400, Phoenix, Arizona	85012
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s Telephone Number, Including Area Code: (602) 265-9200

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

     o      Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

     o      Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

     o      Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

     o      Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01. Regulation FD Disclosure

On September 28, 2006, CSK Auto Corporation (the “Company”) issued a press release announcing the substantial completion of its previously announced internal investigation. The full text of the press release is being furnished as Exhibit 99.1 to this report.

The information contained in this Item 7.01 and the exhibit hereto is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, and shall not be deemed incorporated by reference in any filing with the Securities and Exchange Commission under the Securities Exchange Act of 1934 or the Securities Act of 1933, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.

Item 9.01. Financial Statements and Exhibits

This information shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, and shall not be deemed incorporated by reference in any filing with the Securities and Exchange Commission under the Securities Exchange Act of 1934 or the Securities Act of 1933, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.

     (d) Exhibits. The following exhibit is furnished with this Form 8-K:

Exhibit No.	Description
99.1	Press Release dated September 28, 2006.

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SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

CSK Auto Corporation
By:	/s/  Randi Val Morrison
	Randi Val Morrison
	Vice President, General Counsel and Secretary

DATED: September 28, 2006

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EXHIBIT INDEX

Exhibit No.	Description
99.1	Press Release dated September 28, 2006.

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