FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * PENSKE ROGER S   2. Issuer Name and Ticker or Trading Symbol UNITED AUTO GROUP INC [UAG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman & CEO (Last) (First) (Middle) 2555 TELEGRAPH ROAD 3. Date of Earliest Transaction (Month/Day/Year) 09/14/2006 (Street) BLOOMFIELD HILLS, MI 48302 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 09/14/2006   P   492,185 (1) A (2) 492,185 (1) (3) I By Penske Corporation

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PENSKE ROGER S 2555 TELEGRAPH ROAD BLOOMFIELD HILLS, MI 48302	X	X	Chairman & CEO

Signatures

Shane M. Spradlin, by power of attorney		09/14/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The shares indicated on this form give effect to the Company's 2:1 stock split in the form of a dividend on June 1, 2006.
(2)	Penske Corporation acquired the 492,185 shares of Common Stock of the Issuer in exchange for shares of Penske Corporation Common Stock valued by Penske Corporation at $10,308,985.80, in the aggregate.
(3)	Mr. Penske also reports indirect beneficial ownership of 64,550 shares held by International Motor Cars Group II, LLC, 22,308,042 shares held by Penske Automotive Holdings, Inc., 13,311,817 shares held by PCP Holdings, Inc., and direct beneficial ownership of 707,081 shares. Mr. Penske disclaims beneficial ownership of all indirectly held securities, except to the extent of his pecuniary interest, if any, and this report shall not be deemed an admission that he is the beneficial owner of such securities for purposes of Section 16 or otherwise.

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