2021-2023 Audi MIB3 Blower Setting Adjustment Issue TSB

Symptoms

Owners of various 2021-2023 Audi models may experience an intermittent issue where it is not possible to adjust the blower setting in the air conditioner operating unit, which is controlled via the lower display. The system may display specific messages indicating the malfunction.

Common verbatim messages seen on the display include: "Blower adjustment greyed out. Cannot be operated." or "Blower adjustment missing. Cannot be operated." These messages signify that the climate control's blower speed cannot be modified through the MIB3 infotainment interface.

Diagnosis and Trigger Conditions

Workshop findings indicate that this issue occurs intermittently. The root cause has been identified as a software problem within control unit 1 for information electronics (005F) of the MIB3 system. The good news is that the problem can often be temporarily resolved by simply restarting or resetting the MMI system.

Repair Procedure Summary (Workaround)

While a permanent software solution for the Audi MIB3 blower setting issue is still under development, Audi has provided a temporary workaround that owners can perform. If you encounter the inability to adjust your blower settings, you can restart the MMI system.

To restart the MMI system, press and hold the on/off button for at least 10 seconds until the system completely restarts. After the system has rebooted, the lower display should regain its correct functionality, allowing you to adjust the blower settings as usual. This procedure is detailed in your vehicle's Owner's Manual under "Restarting the MMI."

Important Warnings for Owners

Audi has issued several important advisories regarding this Audi MIB3 blower setting issue:

• No Immediate Repair: Audi explicitly states, "Please postpone the repair as there is currently no effective repair for the complaint described by the customer." This means that dealers should not attempt extensive diagnostics or replace parts for this specific complaint, as a definitive fix is not yet available.
• Staged Software Update: A comprehensive software update, referred to as "customer service package 1," is planned for distribution. This update will be rolled out in stages, depending on specific vehicle equipment. The exact software measure and corresponding SVM code are still under development.
• No Unjustified Repairs: Owners should be aware that "There is no reason to replace parts or attempt repairs. Unjustified work/replacement parts will be charged back. Invoicing under warranty is not permitted." This policy aims to prevent unnecessary costs for owners and ensures that dealers do not bill Audi for unapproved repair attempts.
• Informational Bulletin: This Technical Service Bulletin is primarily informational. Audi notes that it "is informational only and not applicable to any Audi Warranty," indicating its purpose is to inform technicians and owners about the issue and its temporary resolution rather than outlining a warranty-covered repair procedure.

Additional Information

This Technical Service Bulletin (TSB) 87 24 94 2071139/4, which supersedes TSB Group 87 number 24-71 dated April 5, 2024, references another important document: TSB 2076404. This related TSB is titled "00 Deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR." This indicates that the eventual permanent software solution for the Audi MIB3 blower setting problem will likely be part of a broader software update package affecting various MIB3-related components and vehicle platforms.