2025 Audi MMI No Audio Output TSB 2079976/2

Symptoms of No MMI Audio Output

Owners of certain 2025 Audi models may experience a frustrating issue where there is "no audio output for the radio or media on the MMI" when the vehicle is started. This problem can affect all radio and media sources, meaning you might not hear any sound from your music, podcasts, or navigation prompts. The issue is described as "91 MMI entertainment: occasionally no audio output for entertainment when vehicle is started."

Even more concerning, attempts to restore the audio by pressing or turning the volume control or using the play/pause button in the MMI's entertainment menu will not work. While the MMI screen might still show the volume bar and indicate that media is playing, no actual sound will be produced. This specific complaint, the "2025 Audi MMI no audio output," is limited to the entertainment functions of the MMI system.

It's important to note that other audio functions in your vehicle will likely remain operational. For instance, you should still hear sounds for your turn signals, parking aid alerts, and various warning tones. The problem specifically targets the entertainment audio, confirming a distinct issue with that system component.

Affected Equipment

This specific audio issue is known to occur in 2025 Audi A5, S5, Q5, and SQ5 models that are equipped with the Bang & Olufsen premium sound system, which includes 3D sound and loudspeakers in the head restraints. This specific sound system is identified by PR number 8RT. The issue affects all VIN ranges for these models in the 2025 model year.

Technical Background and Diagnosis

Audi has identified the root cause of the "2025 Audi MMI no audio output" as a software issue. This means the problem isn't due to a faulty hardware component but rather an error in the vehicle's MMI software programming.

In a workshop setting, technicians can easily reproduce the complaint, confirming the presence of the software glitch. This reproducibility helps ensure that the correct diagnostic and repair steps are taken to address the problem effectively.

Repair Procedure Summary

To resolve the "2025 Audi MMI no audio output" problem, the primary solution is an MMI software update. This update must be performed according to the detailed instructions provided in another Audi Technical Service Bulletin, TSB 2079690, titled "00 Combined software update 03.10.00/C (28.13.01) KD2."

The software update process typically involves connecting a battery charger to the vehicle to maintain stable voltage during the update. The update itself is a fixed-rate procedure that includes all necessary preliminary and follow-up work, such as allowing for a bus sleep cycle and performing calibration drives, as outlined in the service bulletin. When performing the combined software update, time stamps are not required for billing under warranty, allowing technicians to work on other vehicles simultaneously. This combined software update can also be performed by non-productive personnel.

Important Warnings and Production Solution

Audi has implemented a production solution to prevent this issue in newer vehicles. The "2025 Audi MMI no audio output" complaint will no longer occur in vehicles manufactured in week 42/25 or later. This means that vehicles produced after this specific timeframe should not experience this particular software-related audio problem.

This Technical Service Bulletin 2079976/2 is a revision that supersedes a previous bulletin, PSS TSB 2077164, which also addressed the issue of "91 PSS MMI entertainment: occasionally no audio output for entertainment when vehicle is started." This revision ensures that technicians have the most up-to-date information and procedures for resolving the issue.

What Owners Should Know: If your vehicle is outside of any warranty, this Technical Service Bulletin is informational only. This means that the cost of diagnosis and repair may not be covered by Audi, and you might be responsible for the expenses incurred.

Warranty Information

For vehicles still under warranty, this software update should be covered. Audi's warranty claims for this specific issue use Service Number 9196 and Damage Code KD02. All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to review or audit by Audi Warranty.

Labor operations associated with this repair include:

• 0151 0010: Software update, including connecting a battery charger. This operation refers to the Service Repair Time (SRT) with associated operations.
• 0151 0040: Fixed rate for the software update, covering all required preliminary and follow-up work, including bus sleep cycle, calibration drives, and additional work. This is allocated 130 Technical Units (TU).
• 0150 9999: In cases where additional attempts are needed due to a flash abort, an additional lump sum of 50 Technical Units (TU) can be claimed per flash cancellation. This is applied per each documented attempt.

The claim comment for this procedure is "As per TSB 2079976/2." All part and service references provided in this TSB are subject to change and/or removal, and technicians are advised to check with their Parts Department and/or ETKA for the latest information.

Owner Action

If you own a 2025 Audi A5, S5, Q5, or SQ5 with the Bang & Olufsen sound system and are experiencing the "2025 Audi MMI no audio output" issue, you should schedule an appointment with an authorized Audi dealership. The technicians at the dealership will be able to diagnose the problem and perform the necessary MMI software update as outlined in TSB 2079976/2 and TSB 2079690.

It is always advisable to check with your Audi dealer regarding the applicability of this TSB to your specific vehicle and any potential costs involved, especially if your vehicle's warranty coverage is uncertain.

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Source: NHTSA ID 11027419