UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K/A

Amendment No. 1

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2016

For the transition period from              to             

Commission File Number of Issuing Entity: 333-184646-02

Central Index Key Number of Issuing Entity: 0001646829

USAA Auto Owner Trust 2015-1

(Exact name of Issuing Entity as specified in its charter)

Commission File Number of Depositor: 333-184646

Central Index Key Number of Depositor: 0001178049

USAA Acceptance, LLC

(Exact name of Depositor as specified in its charter)

Central Index Key Number of Sponsor: 0000908392

USAA Federal Savings Bank

(Exact name of Sponsor as specified in its charter)

(302) 575-2004

(Issuing Entity’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer (as defined in Rule 405 of the Act).    ☐  Yes    ☑  No

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Securities Exchange Act.    ☐  Yes    ☑  No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     ☑  Yes    ☐  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes  ☑    No  ☐

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☑

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).     Yes  ☐     No  ☑

State the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant’s most recently completed second fiscal quarter. None

Documents incorporated by reference: See Exhibit Index.

EXPLANATORY NOTE

This Amendment No. 1 amends the Annual Report on Form 10-K for the fiscal year ended December 31, 2016 which was filed with the Securities and Exchange Commission on March 30, 2017 and is being filed for the purpose of filing a new Exhibit 31 (Certification of Senior Officer in Charge of Securitization of the Depositor Pursuant to Rule 15d-14(d)).

Other than as discussed above, this Form 10-K/A does not update or amend any other information or any exhibits as originally filed on the Form 10-K and does not otherwise reflect events occurring after the original filing date of the Form 10-K. Accordingly, this Form 10-K/A should be read in conjunction with the Form 10-K and with other filings made by the issuing entity with the Securities and Exchange Commission subsequent to the filing of the Form 10-K.

FORM 10-K

PART I

THE FOLLOWING ITEMS HAVE BEEN OMITTED IN ACCORDANCE WITH GENERAL INSTRUCTION J(1) TO FORM 10-K:

Item 1B. Unresolved Staff Comments.

Not Applicable.

Item 4. Mine Safety Disclosures.

Not Applicable.

PART II

THE FOLLOWING ITEMS HAVE BEEN OMITTED IN ACCORDANCE WITH GENERAL INSTRUCTION J(1) TO FORM 10-K:

Item 9B. Other Information.

None.

PART III

THE FOLLOWING ITEMS HAVE BEEN OMITTED IN ACCORDANCE WITH GENERAL INSTRUCTION J(1) TO FORM 10-K:

PART IV

Item 15. Exhibits, Financial Statement Schedules.

Item 16. Form 10-K Summary.

Not Applicable.

SUBSTITUTE INFORMATION PROVIDED IN ACCORDANCE WITH GENERAL INSTRUCTION J(2) TO FORM 10-K:

Item 1112(b) of Regulation AB. Significant Obligors of Pool Assets (Financial Information).

Not Applicable.

Item 1114(b)(2) of Regulation AB. Credit Enhancement and Other Support, Except for Certain Derivatives Instruments (Information Regarding Significant Enhancement Providers – Financial Information).

Not Applicable.

Item 1115(b) of Regulation AB. Certain Derivatives Instruments (Financial Information).

Not Applicable.

Item 1117 of Regulation AB. Legal Proceedings.

No legal proceedings are pending against any of USAA Federal Savings Bank (in its capacity as the sponsor, (the “Sponsor”), in its capacity as an originator contemplated by Item 1110(b) of Regulation AB, (the “Originator”), in its capacity as servicer, (the “Servicer”) and in its capacity as administrator (the “Administrator”) of USAA Auto Owner Trust 2015-1 (the “Issuing Entity”), USAA Acceptance, LLC (the “Depositor”), Wells Fargo Delaware Trust Company, National Association (the “Owner Trustee”) or the Issuing Entity, or of which any property of the foregoing is the subject, that are or would be material to holders of the asset-backed notes (the “Notes”) or the asset-backed certificate (the “Certificate”). No such proceedings are known to be contemplated by governmental authorities.

U.S. Bank National Association, as the indenture trustee (the “Indenture Trustee”), has provided the following information for inclusion in this Form 10-K:

Since 2014 various plaintiffs or groups of plaintiffs, primarily investors, have filed claims against U.S. Bank National Association (“U.S. Bank”), in its capacity as trustee or successor trustee (as the case may be) under certain residential mortgage backed securities (“RMBS”) trusts. The plaintiffs or plaintiff groups have filed substantially similar complaints against other RMBS trustees, including Deutsche Bank, Citibank, HSBC, Bank of New York Mellon and Wells Fargo. The complaints against U.S. Bank allege the trustee caused losses to investors as a result of alleged failures by the sponsors, mortgage loan sellers and servicers for these RMBS trusts and assert causes of

action based upon the trustee’s purported failure to enforce repurchase obligations of mortgage loan sellers for alleged breaches of representations and warranties concerning loan quality. The complaints also assert that the trustee failed to notify securityholders of purported events of default allegedly caused by breaches of servicing standards by mortgage loan servicers and that the trustee purportedly failed to abide by a heightened standard of care following alleged events of default.

Currently U.S. Bank is a defendant in multiple actions alleging individual or class action claims against the trustee with respect to multiple trusts as described above with the most substantial case being: BlackRock Balanced Capital Portfolio et al v. U.S. Bank National Association, No. 605204/2015 (N.Y. Sup. Ct.) (class action alleging claims with respect to approximately 794 trusts) and its companion case BlackRock Core Bond Portfolio et al v. U.S. Bank National Association, No. 14-cv-9401 (S.D.N.Y.). Some of the trusts implicated in the aforementioned Blackrock cases, as well as other trusts, are involved in actions brought by separate groups of plaintiffs related to no more than 100 trusts per case.

U.S. Bank cannot assure you as to the outcome of any of the litigation, or the possible impact of these litigations on the trustee or the RMBS trusts. However, U.S. Bank denies liability and believes that it has performed its obligations under the RMBS trusts in good faith, that its actions were not the cause of losses to investors and that it has meritorious defenses, and it intends to contest the plaintiffs’ claims vigorously.

Item 1119 of Regulation AB. Affiliations and Certain Relationships and Related Transactions.

Information required by Item 1119 of Regulation AB has been omitted from this report on Form 10-K in reliance on the Instruction to Item 1119.

Item 1122 of Regulation AB. Compliance with Applicable Servicing Criteria.

The Servicer and the Indenture Trustee (collectively, the “Servicing Parties”) have each been identified by the Depositor as parties participating in the servicing function with respect to the asset pool held by the Issuing Entity. Each of the Servicing Parties has completed a report on an assessment of compliance with the servicing criteria set forth in paragraph (d) of Item 1122 of Regulation AB applicable to it (each, a “Servicing Assessment Report”), which Servicing Assessment Reports are attached as exhibits to this Form 10-K. In addition, each of the Servicer and the Indenture Trustee has provided an attestation report (each, an “Attestation Report”) by an independent registered public accounting firm, which reports are also attached as exhibits to this Form 10-K. Neither the Servicing Reports nor the Attestation Reports for the Indenture Trustee and the Servicer have identified any material instances of noncompliance with the servicing criteria described in such Servicing Report as being applicable to the Indenture Trustee or the Servicer, as applicable.

Item 1123 of Regulation AB. Servicer Compliance Statement.

The Servicer has completed a statement of compliance with its activities during the reporting period and of its performance under the applicable servicing agreement (a “Compliance Statement”), signed by an authorized officer of the Servicer. The Compliance Statement is attached as Exhibit 35.1 to this Form 10-K.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Depositor has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: August 18, 2017

Supplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants which have not Registered Securities Pursuant to Section 12 of the Act.

Not Applicable.

EXHIBIT INDEX