2025 Audi MMI CarPlay Audio Reduction TSB 2079977/1

Owners of certain 2025 Audi models, including the A5, Q5, S5, and SQ5, may experience an issue where the audio volume does not properly reduce when navigation announcements or traffic reports are played through Apple CarPlay. This problem, identified in Audi Technical Service Bulletin (TSB) 2079977/1, specifically affects the MMI Entertainment system, leading to a "no audio volume reduction after using Apple CarPlay" condition.

Symptoms

Vehicle owners report that the "Audio volume reduction for media playback during navigation announcements or traffic reports sometimes does not work." This symptom is particularly noticeable when using Apple CarPlay for media playback and navigation. The expected temporary decrease in media volume during spoken navigation instructions fails to occur, potentially making it difficult to hear the announcements clearly. This directly impacts the user experience for the 2025 Audi MMI CarPlay audio reduction feature.

Diagnosis and Trigger Conditions

Audi workshops can reliably reproduce the 2025 Audi MMI CarPlay audio reduction issue through a specific sequence of steps to confirm the fault:

1. Check MMI Settings: Verify in the MMI audio settings that the audio volume reduction is activated for navigation announcements and traffic reports.
2. Connect Apple CarPlay: Connect a mobile device to use Apple CarPlay and start media playback via Apple CarPlay.
3. Start MMI Navigation: Initiate route guidance using the native navigation system in the MMI.
4. Trigger Announcement: In the MMI navigation menu, select the next navigation instruction so that the navigation announcement is played for this instruction.
5. Activate Voice Control: Activate voice control with Siri by saying "Hey Siri" and then stop it again.
6. Repeat Announcement Trigger: Repeat step 4 to trigger another navigation announcement.

While the expected audio volume reduction typically occurs during steps 4 and 5, the issue manifests during the second repetition of step 4 (step 6), where the volume reduction fails to engage. This confirms the presence of the 2025 Audi MMI CarPlay audio reduction problem.

Technical Background

Audi has identified the root cause of this problem as a software issue within the MMI Entertainment system. This means the functionality is not performing as intended due to a programming error, rather than a hardware defect, leading to the inconsistent audio volume reduction.

Repair Procedure Summary

The resolution for the 2025 Audi MMI CarPlay audio reduction issue involves performing a software update. The TSB directs technicians to update the MMI software by following the instructions detailed in a separate document: TSB 2079690, titled "00 Combined software update 03.10.00/C (28.13.01) KD2." This update is designed to correct the software anomaly preventing proper audio volume reduction during navigation announcements or traffic reports when Apple CarPlay is active.

Production Solution

Audi has implemented a production solution to prevent this issue in newly manufactured vehicles. The complaint of "no audio volume reduction after using Apple CarPlay" will no longer occur in vehicles produced in week 42/25 or later. This indicates that vehicles manufactured from this point onward will have the corrected software pre-installed, ensuring proper audio behavior from the factory.

Warranty Details

For eligible vehicles, the software update to address TSB 2079977/1 can be performed under warranty. If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only, meaning the repair may be at the owner's expense.

• Service Number: 9196
• Damage Code: KD02
• Labor Operations:
  • 0151 0010: Software update, including connecting battery charger. This operation refers to the Service Repair Time (SRT) with associated operations.
  • 0151 0040: Fixed rate for software update, including all required preliminary and follow-up work (such as bus sleep cycle, calibration drive, additional work, and restarting software update if flashing is aborted). This operation is allotted 130 Time Units (TU).
• Claim Comment: As per TSB 2079977/1.

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Audi also notes that when performing the combined software update, time stamps are not required for billing under warranty, allowing technicians to work on other vehicles simultaneously. The combined software update can also be performed by non-productive personnel.

Important Notes for Owners

This Technical Service Bulletin (TSB) 2079977/1 replaces a previous Pending Service Solution (PSS) TSB 2078181, which was titled "91 PSS MMI Entertainment: No audio volume reduction after using Apple." If you previously had your vehicle serviced for this issue under the superseded PSS, the current TSB provides the definitive repair procedure. Owners experiencing the 2025 Audi MMI CarPlay audio reduction should contact their authorized Audi dealer to schedule the necessary software update.

Additional Information

All part and service references provided in this TSB are subject to change and/or removal. Owners and technicians should always check with their Parts Department and/or ETKA for the latest information and parts bulletins. It is also recommended to check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair process.

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Source: NHTSA ID: 11026266