|        |                                                                                             |  |  |  |  |
|--------|---------------------------------------------------------------------------------------------|--|--|--|--|
| þ | ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES   EXCHANGE ACT OF 1934 |

|        |                                                                                                 |  |  |  |  |
|--------|-------------------------------------------------------------------------------------------------|--|--|--|--|
|  ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES   EXCHANGE ACT OF 1934 |

|                                 |                     |  |  |  |  |
|---------------------------------|---------------------|--|--|--|--|
| DELAWARE                        | 93-6426774          |
| (State or other jurisdiction of | (I.R.S. Employer    |
| incorporation or organization)  | Identification No.) |

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|                                                |  |                                                  |  |  |  |  |  |  |
|------------------------------------------------|--|--------------------------------------------------|--|--|--|--|--|--|
|  ̈  Large accelerated filer |  |  ̈  Accelerated filer              |
|                                                |  |  ̈  Smaller reporting company |
| þ  Non-accelerated filer        |  |  ̈  Emerging growth company             |

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|          |  |                                                                                                                     |  |  |  |  |  |  |  |  |  |
|----------|--|---------------------------------------------------------------------------------------------------------------------|--|--|--|--|--|--|--|--|--|
| Part I   |  |                                                                                                                     |  |
| Item 1.  |  | Business*                                                                                                           |  |
| Item 1A. |  | Risk Factors*                                                                                                       |  |
| Item 1B. |  | Unresolved Staff Comments                                                                                           |  |
| Item 1C. |  | Cybersecurity*                                                                                                      |  |
| Item 2.  |  | Properties*                                                                                                         |  |
| Item 3.  |  | Legal Proceedings*                                                                                                  |  |
| Item 4.  |  | Mine Safety Disclosures                                                                                             |  |
| Part II  |  |                                                                                                                     |  |
| Item 5.  |  | Market For Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities* |  |
| Item 6.  |  | [Reserved]*                                                                                                 |  |
| Item 7.  |  | Management’s Discussion and Analysis of Financial Condition and Results of Operations*                        |  |
| Item 7A. |  | Quantitative and Qualitative Disclosures About Market Risk*                                                         |  |
| Item 8.  |  | Financial Statements and Supplementary Data*                                                                        |  |
| Item 9.  |  | Changes in and Disagreements with Accountants on Accounting and Financial Disclosure*                               |  |
| Item 9A. |  | Controls and Procedures*                                                                                            |  |
| Item 9B. |  | Other Information                                                                                                   |  |
| Item 9C. |  | Disclosure Regarding Foreign Jurisdictions that Prevent Inspections                                                 |  |
| Part III |  |                                                                                                                     |  |
| Item 10. |  | Directors, Executive Officers and Corporate Governance*                                                             |  |
| Item 11. |  | Executive Compensation*                                                                                             |  |
| Item 12. |  | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters*                     |  |
| Item 13. |  | Certain Relationships and Related Transactions and Director Independence*                                           |  |
| Item 14. |  | Principal Accounting Fees and Services*                                                                             |  |
| Part IV  |  |                                                                                                                     |  |
| Item 15. |  | Exhibit and Financial Statement Schedules                                                                           |  |
| Item 16. |  | Form 10-K Summary                                                                                                   |  |

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|  |     |                                                                 |                                                       |                                                                                                                                                                                                                                                                   |  |  |  |  |  |  |  |  |  |  |
|--|-----|-----------------------------------------------------------------|-------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|--|--|--|--|--|--|--|--|--|
|  | (a) | List the following documents filed as a part of the report: |
|  |     |                                                                 |                                                       |                                                                                                                                                                                                                                                                   |
|  |     | (1)                                                             | Financial Statements — Not Applicable.          |
|  |     | (2)                                                             | Financial Statement Schedules — Not Applicable. |
|  |     | (3)                                                             | Exhibits                                              |
|  |     |                                                                 | •                                               | Second Amended and Restated Limited Liability Company Agreement of Ally Auto Assets LLC, dated as of November 7, 2018.                                                                                                                                            |
|  |     |                                                                 | •                                               | Indenture between Ally Auto Receivables Trust 2023-1 and U.S. Bank Trust Company, National Association, as Indenture Trustee, dated as of July 19, 2023.                                                                                                          |
|  |     |                                                                 | •                                               | Trust Agreement between Ally Auto Assets LLC, as Depositor and BNY Mellon Trust of Delaware, as Owner Trustee and Paying Agent, dated as of July 19, 2023.                                                                                                        |
|  |     |                                                                 | •                                               | Pooling Agreement between Ally Bank, as Seller, and Ally Auto Assets LLC, dated as of July 19, 2023.                                                                                                                                                              |
|  |     |                                                                 | •                                               | Rule 13a-14(d)/15d-14(d) Certification (Section 302 Certification).                                                                                                                                                                                           |
|  |     |                                                                 | •                                               | Report on Assessment of Compliance with SEC Regulation AB Servicing Criteria concerning activities of Ally Bank for the year ended December 31, 2023.                                                                                                             |
|  |     |                                                                 | •                                               | Report on Assessment of Compliance with SEC Regulation AB Servicing Criteria concerning activities of U.S. Bank Trust Company, National Association for the year ended December 31, 2023.                                                                         |
|  |     |                                                                 | •                                               | Registered Public Accounting Firm Attestation Report on Assessment of Compliance with applicable Servicing Criteria of Ally Bank dated March 8, 2024 for the year ended December 31, 2023.                                                                        |
|  |     |                                                                 | •                                               | Registered Public Accounting Firm Attestation Report on Assessment of Compliance with applicable Servicing Criteria of U.S. Bank Trust Company, National Association dated February 27, 2024 for the year ended December 31, 2023.                                |
|  |     |                                                                 | •                                               | Servicer Compliance Statement of Ally Bank for the year ended December 31, 2023.                                                                                                                                                                                  |
|  |     |                                                                 | •                                               | Trust Sale Agreement between Ally Auto Assets LLC, as Depositor, and Ally Auto Receivables Trust 2023-1, as Issuing Entity, dated as of July 19, 2023.                                                                                                            |
|  |     |                                                                 | •                                               | Custodian Agreement between Ally Bank, as Custodian, and Ally Auto Assets LLC, as Depositor, dated as of July 19, 2023.                                                                                                                                           |
|  |     |                                                                 | •                                               | Administration Agreement among Ally Auto Receivables Trust 2023-1, as Issuing Entity, Ally Bank, as Administrator, and U.S. Bank Trust Company, National Association, as Indenture Trustee, dated as of July 19, 2023.                                            |
|  |     |                                                                 | •                                               | Servicing Agreement among Ally Bank, as Servicer, Ally Auto Assets LLC, as Depositor, and Ally Auto Receivables Trust 2023-1, as Issuing Entity, dated as of July 19, 2023.                                                                                       |
|  |     |                                                                 | •                                               | Asset Representations Review Agreement among Ally Auto Receivables Trust 2023-1, as Issuing Entity, Ally Bank, as Sponsor, and Clayton Fixed Income Services LLC, as Asset Representations Reviewer, dated as of July 19, 2023.                                   |
|  |     |                                                                 | •                                               | Securities Account Control Agreement among Ally Auto Receivables Trust 2023-1, as Issuing Entity, U.S. Bank Trust Company, National Association, as Indenture Trustee, and U.S. Bank National Association, as Securities Intermediary, dated as of July 19, 2023. |

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|  |                                                               |  |  |  |  |  |  |  |
|--|---------------------------------------------------------------|--|--|--|--|--|--|--|
|  | Ally Auto Assets LLC, as Depositor                            |
|  |                                                               |
|  | /s/ Elliot Kahan                                      |  |
|  | Elliot Kahan                                                  |
|  | President                                                     |
|  | (Senior Officer in charge of securitization of the depositor) |
|  |                                                               |

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|         |  |                                                                                                                                                                                                                                                                   |  |                            |  |  |  |  |  |  |  |  |  |  |
|---------|--|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|----------------------------|--|--|--|--|--|--|--|--|--|--|
| Exhibit |  | Description                                                                                                                                                                                                                                                       |  | Method of Filing |
|         |  |                                                                                                                                                                                                                                                                   |  |                            |
| 3.1     |  | Second Amended and Restated Limited Liability Company Agreement of Ally Auto Assets LLC, dated as of November 7, 2018.                                                                                                                                            |  | **                         |
| 4.1     |  | Indenture between Ally Auto Receivables Trust 2023-1 and U.S. Bank Trust Company, National Association, as Indenture Trustee, dated as of July 19, 2023.                                                                                                          |  | *                          |
| 4.2     |  | Trust Agreement between Ally Auto Assets LLC, as Depositor and BNY Mellon Trust of Delaware, as Owner Trustee and Paying Agent, dated as of July 19, 2023.                                                                                                        |  | *                          |
| 4.3     |  | Pooling Agreement between Ally Bank, as Seller, and Ally Auto Assets LLC, dated as of July 19, 2023.                                                                                                                                                              |  | *                          |
| 31.1    |  | Certification of Executive Officer Pursuant to Rule 13a-14(d)/15d-14(d).                                                                                                                                                                                      |  | Filed herewith.            |
| 33.1    |  | Report on Assessment of Compliance with SEC Regulation AB Servicing Criteria concerning activities of Ally Bank for the year ended December 31, 2023.                                                                                                             |  | Filed herewith.            |
| 33.2    |  | Report on Assessment of Compliance with SEC Regulation AB Servicing Criteria concerning activities of U.S. Bank Trust Company, National Association for the year ended December 31, 2023.                                                                         |  | Filed herewith.            |
| 34.1    |  | Registered Public Accounting Firm Attestation Report on Assessment of Compliance with applicable Servicing Criteria of Ally Bank dated March 8, 2024 for the year ended December 31, 2023.                                                                        |  | Filed herewith.            |
| 34.2    |  | Registered Public Accounting Firm Attestation Report on Assessment of Compliance with applicable Servicing Criteria of U.S. Bank Trust Company, National Association, dated February 27, 2024 for the year ended December 31, 2023.                               |  | Filed herewith.            |
| 35.1    |  | Servicer Compliance Statement of Ally Bank for the year ended December 31, 2023.                                                                                                                                                                                  |  | Filed herewith.            |
| 99.1    |  | Trust Sale Agreement between Ally Auto Assets LLC, as Depositor, and Ally Auto Receivables Trust 2023-1, as Issuing Entity, dated as of July 19, 2023.                                                                                                            |  | *                          |
| 99.2    |  | Custodian Agreement between Ally Bank, as Custodian, and Ally Auto Assets LLC, as Depositor, dated as of July 19, 2023.                                                                                                                                           |  | *                          |
| 99.3    |  | Administration Agreement among Ally Auto Receivables Trust 2023-1, as Issuing Entity, Ally Bank, as Administrator, and U.S. Bank Trust Company, National Association, as Indenture Trustee, dated as of July 19, 2023.                                            |  | *                          |
| 99.4    |  | Servicing Agreement among Ally Bank, as Servicer, Ally Auto Assets LLC, as Depositor, and Ally Auto Receivables Trust 2023-1, as Issuing Entity, dated as of July 19, 2023.                                                                                       |  | *                          |
| 99.5    |  | Asset Representations Review Agreement among Ally Auto Receivables Trust 2023-1, as Issuing Entity, Ally Bank, as Sponsor, and Clayton Fixed Income Services LLC, as Asset Representations Reviewer, dated as of July 19, 2023.                                   |  | *                          |
| 99.6    |  | Securities Account Control Agreement among Ally Auto Receivables Trust 2023-1, as Issuing Entity, U.S. Bank Trust Company, National Association, as Indenture Trustee, and U.S. Bank National Association, as Securities Intermediary, dated as of July 19, 2023. |  | *                          |

|   |                                                                                                                                                                        |  |  |  |  |
|---|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|--|--|--|
| * | Incorporated by reference to the corresponding Exhibit to the Issuing Entity’s Current Report on Form 8-K filed on July 19, 2023  (File No. 333-262894-04). |

|    |                                                                                                                                                            |  |  |  |  |
|----|------------------------------------------------------------------------------------------------------------------------------------------------------------|--|--|--|--|
| ** | Incorporated by reference to Exhibit 3.1 of Ally Auto Assets LLC's Form SF-3 Registration Statement filed on February 22, 2022 (File No. 333-262894). |