2021-2022 Audi MIB3 Star Button Function Lost TSB

Symptoms

Owners of certain 2021-2022 Audi vehicles equipped with the MIB3 infotainment system may notice an issue with their Audi MIB3 star button. Specifically, when the "star button" is programmed to front camera views, the setting is lost after a bus sleep cycle. This means that the customized function assigned to the star button does not persist after the vehicle has been turned off and restarted, requiring the owner to reprogram it each time.

Technical Background

Audi has identified that the loss of the Audi MIB3 star button function is caused by a software bug within the MIB3 system. This bug prevents the system from properly retaining the assigned function for the star button, particularly when it's linked to the front camera views, after the vehicle undergoes a bus sleep cycle. A bus sleep cycle occurs when the vehicle's electrical systems power down after a period of inactivity, which is a normal operational state.

Important Warnings

Audi has provided specific instructions for this condition:

• "Explain to the customer that a solution is forthcoming in the 1st quarter of 2023 and that no repairs are necessary at this point."
• "Do not replace any components for this condition since this will not resolve the customer's concern."
• "This TSB is informational only and not applicable to any Audi Warranty."

These warnings emphasize that technicians should not attempt to replace any parts to fix this issue, as it is a software-related problem that hardware replacement will not resolve. Owners should be informed that a software solution is under development.

What Audi is Doing Now

Audi is actively working on a production solution to rectify this software bug. While a permanent fix is being developed and is expected in the first quarter of 2023, dealers are instructed to create a Pending Service Solutions (PSS) record. This record can be created through the PSS application found in AccessAudi (under Related Links >> Service) or via the Technical Assistance page in Elsa. This process helps Audi track the prevalence of the issue and prepare for the eventual software update.

TSB Revision History

This Technical Service Bulletin, identified as PSS 91 MIB3 with reference number 91 22 73 2064429/2, was initially published on September 1, 2021. It was revised on January 31, 2022, to Revision 2. This revision primarily involved updating the header to include new models and apply a software filter, expanding the scope of affected vehicles. This TSB supersedes the previous Technical Service Bulletin Group 91 number 21-26, which was dated September 1, 2021.