2022-2024 Audi MIB3 Volume Control Not Working TSB

Audi has released Technical Service Bulletin (TSB) 91 24 75 2072873/2 to address an issue where the touch-operated volume control in the center console may become inoperable. This TSB, dated February 23, 2024, supersedes previous bulletin 24-61 and provides diagnostic and repair procedures for affected 2022-2024 Audi MIB3 models. Owners experiencing problems with their Audi MIB3 volume control U11B900 should be aware of this bulletin.

Symptoms

Owners of affected Audi vehicles may observe the following issues:

• The touch-operated volume control in the center console is not working.
• Both the volume control and the skip buttons are inoperable.

Fault Codes / DTCs

When these symptoms occur, technicians may find a specific Diagnostic Trouble Code (DTC) stored in the vehicle's systems. The relevant DTC is:

• U11B900: Volume control no communication (active/static)

This DTC is typically stored in the Information Electronics control unit, identified as -J794- (address word 005F).

Diagnosis

Diagnosis for this issue primarily involves checking for the presence of DTC U11B900 within the Information Electronics control unit. The presence of this code, combined with the reported symptoms of an inoperable Audi MIB3 volume control U11B900, confirms the need for the repair outlined in TSB 2072873/2.

Repair Procedure Summary

The repair procedure for an inoperable volume control begins with a simple reset. Technicians are instructed to perform a terminal 30 reset for the volume regulator E67. This involves removing the relevant fuse for at least 10 seconds and then reinstalling it. After this reset, the volume control is checked for functionality. If the volume control operates correctly after the reset, no further repairs are necessary.

However, if the volume control remains inoperable after the terminal 30 reset, the next step is to replace the volume regulator E67. Technicians are advised to refer to the current wiring diagram in ELSA for the correct fuse location and to ensure proper installation of any replacement parts.

Required Parts and Tools

For this repair, technicians may need the following parts:

• Driver Volume Control (E67): Quantity 01 (if replacement is required). Refer to ETKA for specific part numbers.
• Fasteners, Bolts, Nuts, and Screws: As needed per the repair manual. Refer to ETKA for specific part numbers.

Warranty Information

Audi outlines specific warranty claim types for this technical service bulletin:

• Claim Type 110: Applies to vehicles up to 48 months or 50,000 miles.
• Claim Type G10: For Audi Certified Pre-Owned (CPO) vehicles, requiring verification of owner status.

If the vehicle is outside of any applicable warranty, this Technical Service Bulletin serves as informational guidance only, and repair costs may not be covered. The service number for this bulletin is 9110, and the damage code is 0010. Labor operations include checking the multimedia system operating unit (KL30 reset) with labor code 9195 0199, and removing/installing the multimedia system operating unit (if replacement is needed) with labor code 9195 19XX. Diagnostic time is allocated as 0150 0060, with no allowance for road tests before or after the service procedure.

Important Warnings

Owners should be aware that if their vehicle is outside of warranty coverage, this Technical Service Bulletin is for informational purposes only. This means that any repairs performed based on this bulletin may not be covered by Audi, and owners may be responsible for the cost of parts and labor.

What Owners Should Do

If you are experiencing issues with your Audi MIB3 volume control U11B900 or inoperable skip buttons in your 2022-2024 Audi A3, S3, RS 3, e-tron GT, or Q4 e-tron, it is recommended to contact your authorized Audi dealership. They can diagnose the problem, confirm if your vehicle is affected by TSB 2072873/2, and perform the necessary repairs.

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Source: NHTSA ID: 10250808