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 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Siminoff Ellen F
   2. Issuer Name and Ticker or Trading Symbol
U.S. Auto Parts Network, Inc. [PRTS] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O US AUTO PARTS NETWORK, INC., 17150 MARGAY AVENUE		 3. Date of Earliest Transaction (Month/Day/Year)
05/12/2009
(Street)

CARSON, CA 90746		 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 05/12/2009 05/12/2009 P   2,300 A $ 2.75 3,300 I D&E Living Trust dated October 25, 1996
Common Stock 05/12/2009 05/12/2009 P   1,000 A $ 2.76 4,300 I D&E Living Trust dated October 25, 1996
Common Stock 05/12/2009 05/12/2009 P   100 A $ 2.77 4,400 I D&E Living Trust dated October 25, 1996
Common Stock 05/12/2009 05/12/2009 P   2,300 A $ 2.78 6,700 I D&E Living Trust dated October 25, 1996
Common Stock 05/12/2009 05/12/2009 P   300 A $ 2.81 7,000 I D&E Living Trust dated October 25, 1996
Common Stock 05/12/2009 05/12/2009 P   200 A $ 2.83 7,200 I D&E Living Trust dated October 25, 1996
Common Stock 05/12/2009 05/12/2009 P   10,000 A $ 2.84 17,200 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   200 A $ 2.76 17,400 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   100 A $ 2.79 17,500 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   12,280 A $ 2.80 29,780 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   1,094 A $ 2.82 30,874 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   1,000 A $ 2.83 31,874 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   1,100 A $ 2.84 32,974 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   1,300 A $ 2.85 34,274 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   200 A $ 2.86 34,474 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   200 A $ 2.88 34,674 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   300 A $ 2.89 34,974 I D&E Living Trust dated October 25, 1996
Common Stock 05/13/2009 05/13/2009 P   420 A $ 2.9 35,394 I D&E Living Trust dated October 25, 1996

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

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Reporting Owner Name / Address