2025 Audi A5, S5, SQ5, Q5 MMI Audio Output Lost TSB

Owners of certain 2025 Audi A5, S5, SQ5, and Q5 models may experience an issue where the MMI system's audio output is occasionally lost completely. This problem, identified by Audi as a software issue, affects various critical audio functions within the vehicle. Audi has released Technical Service Bulletin 2077866/2 to address this concern, providing guidance to dealerships and informing owners about the ongoing review and upcoming resolution.

Symptoms of Lost MMI Audio Output

If you own a 2025 Audi A5, S5, SQ5, or Q5, you might notice a complete loss of all audio outputs while driving or immediately after starting the vehicle. This issue impacts a wide range of audio features, including:

• Turn signals
• Parking aid alerts
• Warning tones
• Radio playback
• Media audio
• Navigation announcements
• Phone calls
• Spoken Audi assistant dialogue

When the 2025 Audi A5 audio output lost condition occurs, attempts to restore audio by adjusting the volume, restarting media playback, or switching audio sources will be unsuccessful. In some instances, the problem may be accompanied by a "continuous whistling sound" emanating from the driver display. The MMI system might also crash and automatically restart when this issue manifests.

Diagnosis and Trigger Conditions

This issue has been confirmed by Audi workshops, where the concern can be reproduced. The root cause has been identified as a software issue within the 91 PSS MMI system. The problem specifically affects Audi A5 (FU), A6 e-tron (GH), Q5 (GU), and Q6 e-tron (GF) models equipped with a standard sound system.

Important Warnings for Owners

Audi TSB 2077866/2 includes crucial advisories for both technicians and vehicle owners:

• "Do not replace any components for this condition since this will not resolve the customer's concern." This means that replacing parts will not fix the underlying software issue and could lead to unnecessary costs.
• "Replacing parts or attempting repairs will not fix the problem. Unjustified work/replacement parts will be charged back. Invoicing under warranty is not permitted." Owners should be aware that any attempts by unauthorized service centers to replace components for this specific issue will likely not be covered under warranty and will not resolve the problem.

What Audi is Doing (Production Solution)

Audi is actively working on a permanent solution for the 2025 Audi A5 audio output lost problem. The manufacturer states that the concern will no longer occur in vehicles manufactured in week 48/25 or later. This indicates that a software update will be integrated into the production line to prevent the issue in future vehicles.

What Owners Should Do

If you are experiencing the