2021-2023 Audi MIB3 Blower Setting Not Adjustable TSB

Owners of certain 2021-2023 Audi models may encounter an issue where the MIB3 blower setting is not adjustable. This problem affects the air conditioner operating unit's lower display, preventing control over the blower. Audi Technical Service Bulletin (TSB) 2071139/4 provides details on this intermittent fault and outlines a temporary solution.

This TSB, identified as 87 24 94 2071139/4 and dated December 17, 2024, supersedes the previous Technical Service Bulletin Group 87 number 24-71, dated April 5, 2024. Revisions include updated verbiage for the title, header, condition, technical background, production solution, service, warranty, and additional information, as well as the addition of model year 2023 to the header.

Symptoms

Drivers may notice that the blower setting on their vehicle's air conditioner operating unit (lower display) cannot be adjusted. The display might show the blower adjustment as greyed out or completely missing. Verbatim messages observed by owners include: "Blower adjustment greyed out. Cannot be operated." or "Blower adjustment missing. Cannot be operated."

This condition occurs intermittently, meaning the blower setting may be unadjustable at some times but function normally at others.

Diagnosis / Trigger Conditions

Audi has identified the root cause of the "not possible to adjust blower setting" issue as a software problem within control unit 1 for information electronics (005F). This software anomaly prevents the proper functionality of the blower adjustment on the MIB3 system's lower display.

Workaround / Temporary Solution

Until a permanent solution is available, Audi provides a simple workaround for the not possible to adjust blower setting issue. This temporary fix involves restarting the MMI system. Owners can perform this by following these steps:

1. Refer to the “Restarting the MMI” section in your Owner's Manual for detailed instructions.
2. Press and hold the MMI system's on/off button for at least 10 seconds.
3. Continue holding until the system restarts completely.

After the MMI system has restarted, the lower display should function correctly, allowing adjustment of the blower setting.

Important Warnings for Owners

Audi has provided several critical advisories regarding this issue. Owners should be aware of the following:

• Do not attempt repairs or replace parts: Audi explicitly states, "Please postpone the repair as there is currently no effective repair for the complaint described by the customer." There is "no reason to replace parts or attempt repairs." Unjustified work or replacement parts will be charged back, and invoicing under warranty is not permitted for such actions.
• Warranty limitations: This TSB is informational only and "not applicable to any Audi Warranty" for the described complaint.
• Software update timeline: The permanent software update, referred to as "software update customer service package 1," is currently in development and will be distributed in stages. The software measure and associated SVM code are also under development. Distribution will depend on vehicle type, PR numbers, and model year due to process-related constraints.
• Checking for updates: The current planning status and available updates can be found in the table provided in TSB 2076404.

Future Repair

Audi is actively developing a permanent software update, referred to as "software update customer service package 1," to fully address the MIB3 blower setting malfunction. This update will be rolled out in stages, ensuring compatibility across various vehicle configurations. The production solution for this issue is integrated into Model Year 2023 vehicles.

For comprehensive information regarding the deployment of customer service packages for MLB and MQB platforms, MIB3/connectivity box, OCU3, and LSR systems, refer to TSB 2076404, titled "00 Deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR."

Owner Action

If you experience the not possible to adjust blower setting issue, perform the MMI restart as described above. Do not seek repairs or part replacements for this specific complaint, as a software update is the intended long-term solution. Monitor for future communications from Audi regarding the availability of the software update for your vehicle.

NHTSA ID: 10255390