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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 Yx63lMmwBs6DCHLVG9+mOg==

<SEC-DOCUMENT>0001181431-06-053513.txt : 20060918
<SEC-HEADER>0001181431-06-053513.hdr.sgml : 20060918
<ACCEPTANCE-DATETIME>20060918165330
ACCESSION NUMBER:		0001181431-06-053513
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060914
FILED AS OF DATE:		20060918
DATE AS OF CHANGE:		20060918

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITED AUTO GROUP INC
		CENTRAL INDEX KEY:			0001019849
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-AUTO DEALERS & GASOLINE STATIONS [5500]
		IRS NUMBER:				223086739
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2555 TELEGRAPH RD
		CITY:			BLOOMFIELD HILLS
		STATE:			MI
		ZIP:			48302-0954
		BUSINESS PHONE:		248-648-2500

	MAIL ADDRESS:	
		STREET 1:		2555 TELEGRAPH RD
		CITY:			BLOOMFIELD HILLS
		STATE:			MI
		ZIP:			48302-0954

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MITSUI & CO USA INC
		CENTRAL INDEX KEY:			0001283674
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12297
		FILM NUMBER:		061096157

	MAIL ADDRESS:	
		STREET 1:		200 PARK AVE
		STREET 2:		STE 600
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10166-0130

	FORMER NAME:	
		FORMER CONFORMED NAME:	MITUSI CO USA INC
		DATE OF NAME CHANGE:	20040315

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MITSUI & CO LTD
		CENTRAL INDEX KEY:			0000067099
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-METALS, MINERALS (NO PETROLEUM) [5050]
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12297
		FILM NUMBER:		061096158

	BUSINESS ADDRESS:	
		STREET 1:		2-1 OTEMACHI 1 CHOME
		STREET 2:		CAPITAL FINANCE DEPT
		CITY:			CHIYODA KU TOKYO JAP
		STATE:			M0
		ZIP:			00000

	MAIL ADDRESS:	
		STREET 1:		2-1 OTEMACHI 1 CHOME
		STREET 2:		CHIYODA-KU TOKYO JAPAN
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd130112.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-09-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001019849</issuerCik>
        <issuerName>UNITED AUTO GROUP INC</issuerName>
        <issuerTradingSymbol>UAG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000067099</rptOwnerCik>
            <rptOwnerName>MITSUI &amp; CO LTD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2-1 OHTEMACHI 1-CHOME</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CHIYODA-KU TOKYO</rptOwnerCity>
            <rptOwnerState>M0</rptOwnerState>
            <rptOwnerZipCode>00000</rptOwnerZipCode>
            <rptOwnerStateDescription>JAPAN</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001283674</rptOwnerCik>
            <rptOwnerName>MITSUI &amp; CO USA INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10166-0130</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-09-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>893215</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.94</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12447773</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-09-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>223304</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.94</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3111444</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This share number reflects the two-for-one split effected by the Issuer of its Common Stock on June 1, 2006.  Shareholders of the Issuer of record as of May 11, 2006 received one additional share for each share then owned.  All share and per share information in this Form 4 reflects the stock split.</footnote>
        <footnote id="F2">These shares are owned of record and beneficially by Mitsui &amp; Co. (U.S.A.), Inc., a wholly owned subsidiary of Mitsui &amp; Co., Ltd.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>MITSUI &amp; CO., LTD., By: Tatsuo Nakayama, General Manager First Motor Vehicles Division</signatureName>
        <signatureDate>2006-09-14</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>MITSUI &amp; CO. (U.S.A.), INC., By: Kazuki Okamura, Sr. Vice President and General Manager</signatureName>
        <signatureDate>2006-09-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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