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 * PHELPS BARRY   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) 305 SCARBOROUGH ST. 3. Date of Earliest Transaction (Month/Day/Year) 05/11/2017 (Street) THOUSAND OAKS, CA 91361 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 05/11/2017   A(1)   357 A $ 0 17,357 D

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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

Restricted Stock Units (2)

(3)

05/11/2017

A

3,171

(4)

(3)

Common Stock

3,171

$ 0

3,171

D

Restricted Stock Units (2)

(3)

05/11/2017

M

357

(1)

(1)

Common Stock

357

$ 0

714

D

Stock Options (Right to Buy) (2)

$ 3.93

05/11/2017

A

20,000

05/11/2018

05/10/2027

Common Stock

20,000

$ 0

20,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PHELPS BARRY 305 SCARBOROUGH ST. THOUSAND OAKS, CA 91361	X

Signatures

/s/ David Eisler, as Attorney-in-Fact for Barry Phelps		05/15/2017
**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)	In accordance with the U.S. Auto Parts Network, Inc. 2016 Equity Incentive Plan, the reporting person was granted 1,071 restricted stock units, one third of which vested on May 11, 2017. These restricted stock units converted to common stock on a one-for-one basis upon vesting.
(2)	Granted pursuant to the U.S. Auto Parts Network, Inc. 2016 Equity Incentive Plan.
(3)	Not applicable.
(4)	The Restricted Stock Units shall vest in three equal installments at each of the Company's next three annual stockholder's meetings, subject to the director's continued service through such dates.

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