Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Robson David
  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)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Financial Officer
(Last)
(First)
(Middle)
C/O U.S. AUTO PARTS NETWORK, INC., 16941 KEEGAN AVENUE
3. Date of Earliest Transaction (Month/Day/Year)
09/09/2013
(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

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
Stock Option (Right to Buy) $ 4.62 09/09/2013   D     300,000   (1) 01/02/2022 Common Stock 300,000 (2) 0 D  
Stock Option (Right to Buy) $ 0.9866 09/10/2013   A   85,714     (3) 09/09/2023 Common Stock 85,714 (2) 85,714 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Robson David
C/O U.S. AUTO PARTS NETWORK, INC.
16941 KEEGAN AVENUE
CARSON, CA 90746
      Chief Financial Officer  

Signatures

 /s/ Bryan P. Stevenson, as Attorney-in-Fact for David Robson   09/11/2013
**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 cancelled option provided for vesting such that twenty five percent of the shares of stock subject to the option were to vest on January 3, 2013, and thereafter the balance of the option shares were to vest and become exercisable in a series of thirty-six equal monthly installments over the following three year period, so that all of the shares of stock subject to the option were to be vested on January 3, 2016, subject to the reporting person's continued service relationship with the issuer or any subsidiary of the issuer on each such date.
(2) The reporting person agreed to the cancellation of his outstanding stock option, as reflected in this Form 4, for 300,000 shares of PRTS's common stock granted to the reporting person on January 3, 2012 (the "January 2012 Option") in exchange for a replacement option, for 85,714 shares of PRTS's common stock, having an exercise price of $0.9866 a share, which was granted to the reporting person on September 10, 2013 (the "First Replacement Option"). The reporting person tendered the January 2012 Option pursuant to the terms of the Tender Offer Statement on Schedule TO filed by the Company with the Securities and Exchange Commission on August 12, 2013, as amended, (the "Schedule TO") relating to an offer by the Company to certain employees to exchange outstanding options to purchase shares of common stock based on the exchange ratio of 3.5:1. Upon grant of the First Replacement Option to the reporting person, the January 2012 Option was canceled.
(3) Twenty-five percent of the shares of stock subject to the option vest on September 10, 2014, and thereafter the balance of the option shares vest and become exercisable in a series of thirty-six equal monthly installments over the following three year period, so that all of the shares of stock subject to the option vest on September 10, 2017, subject to the reporting person's continued service relationship with the issuer or any subsidiary of the issuer on each such date.

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