2024-2025 Audi MMI Long Boot Time TSB 2079922/1

Owners of certain 2024-2025 Audi models may experience a condition where the Multi Media Interface (MMI) system exhibits a long boot time. This issue, detailed in Audi Technical Service Bulletin (TSB) 2079922/1, can cause the MMI screen to display a welcome message for an extended period, preventing normal operation. The problem often manifests as a 2025 Audi Q8 MMI long boot time, impacting the user experience and access to vehicle functions.

This TSB, released on November 11, 2025, provides specific guidance for technicians to diagnose and resolve the underlying software-related communication fault. It is crucial for addressing the 2025 Audi Q8 MMI long boot time and similar issues across affected models.

Symptoms of a Long MMI Boot Time

Owners might notice several distinct symptoms if their Audi is affected by this issue:

• The welcome screen on the MMI is displayed for longer than usual, typically two minutes or more, before the system fully loads.
• The app store and cloud music functionalities are unavailable, and no user (except a guest profile) can be selected in the user login screen.
• The MMI screen may sporadically get stuck on the first welcome screen, displaying the message: "Welcome. Loading user information. Please wait..."
• The "User" tile may also be missing from the MMI display.

Workshop findings indicate this is a sporadic fault that cannot always be easily reproduced. Multiple bus sleep cycles may be required to observe the fault condition.

Technical Background

Audi has identified the root cause as an internal communication fault within the vehicle's gateway module. This leads to a software-related functional impairment of the Diagnostic Trouble Code (DTC) environment and history data within the diagnostic interface.

Diagnosis and Fault Codes

For this specific issue, no relevant DTCs are typically logged in diagnostic addresses 005F or 0019. This means standard DTC scans may not immediately identify the problem.

The test plan within the ODIS Guided Fault Finding system might incorrectly prompt a reset to factory settings or the replacement of the DA005F information electronics control unit (J794). However, these actions will not resolve the underlying issue.

To properly diagnose the condition, especially if it is actively occurring, technicians must read all Measured Value Blocks (MVB) of the Gateway. If the MVBs show the error message "Function not available (SID:$22 NRC:$31)" for parameters like GPS position or GPS time, it is a clear indicator that the vehicle is experiencing this specific fault. This diagnostic step involves using the data bus diagnostic interface (J553) DA0019.

Important Warning for Owners and Technicians

Do NOT replace the information electronics control unit (J794) DA005F. Audi's TSB 2079922/1 explicitly states that replacing this control unit will not correct the problem, as the issue is software-related and not a hardware failure of the unit itself.

Repair Procedure Summary

The resolution for this MMI long boot time issue involves a software update. The production solution for this problem is implemented in the diagnostic interface DA0019 with software version SW006x for Model Year 2026 vehicles.

For affected vehicles, the repair process involves creating a Technical Assistance Center (TAC) web ticket, providing detailed customer concern information, attaching photos/videos if available, and creating a self-diagnosis log by reading all measured value blocks from the data bus diagnostic interface (J553) DA0019. The log must then be uploaded for review. Technicians are instructed to follow the repair steps provided by TAC after this documentation is complete.

Warranty Information

For vehicles still under warranty, claims submitted for payment must adhere to the Audi Warranty Policies and Procedures Manual. The claim comment should specify "As per TSB 2079922/1".

The labor operations for this service are GFF / Guided Functions with labor codes 0150 0010 (for general guided functions) and 0150 0060 (for time stated on the diagnostic protocol). If the vehicle is outside of its warranty period, this Technical Service Bulletin is for informational purposes only.

What Owners Should Do

If your 2024-2025 Audi is experiencing a 2025 Audi Q8 MMI long boot time or any of the described symptoms, contact your authorized Audi dealer. Inform them about Technical Service Bulletin (TSB) 2079922/1. The dealer will follow the specific diagnostic and repair procedures outlined by Audi's Technical Assistance Center to address the internal communication fault in the gateway.

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Source: NHTSA ID 10250669