2024-2025 Audi MMI Emergency Call Fault Software Update TSB

Symptoms of MMI and Connectivity Box Issues

Owners of certain 2024-2025 Audi models may experience various problems with their MMI (Multi Media Interface) functions. A common indicator of this issue is the display of an "Emergency call fault" message in the instrument cluster. These symptoms are linked to underlying software issues within the MIB3 infotainment system and connectivity box.

Workshop findings indicate that affected vehicles typically have one of the following software versions in diagnostic address 5F: 4014, 4026, 4318, or 4404. If your vehicle exhibits the "Emergency call fault" or other MMI malfunctions, a software update is likely needed to resolve the problem.

Important Warnings for Owners

Audi Technical Service Bulletin 2079681/2 outlines several critical points for both technicians and owners:

• Do not replace parts unnecessarily: Diagnostic entries logged in diagnostic address 0075 will be resolved by the software update. Guided Fault Finding test plans should not be performed or invoiced for these entries, as they will not resolve the underlying issue.
• Maintain USB stick connection: During the software update, it is crucial to leave the USB stick inserted until instructed to remove it. The correct timing for removal is specified in the repair procedure.
• Use correct USB media: Do not use an SD card with an adapter USB stick for the update. Additionally, avoid using USB-C sticks with larger storage capacities, as they may have incompatible formatting processes.
• Specific software version requirement: The update for the Android control unit (078E) must only be performed if its current software version is below 0621.
• Emergency Call LED: If, after the update, the emergency call LED in the roof module does not turn green, refer to TSB 2079652 for further diagnosis.

Technical Background

The root cause of these MMI and connectivity box malfunctions, including the "Emergency call fault" message, has been identified as software issues. The new software, which addresses these problems, was integrated into production for model year 2025 vehicles. For earlier affected models, a software update is necessary to bring the systems up to date.

Repair Procedure Summary

The repair involves a comprehensive software update for the MMI and connectivity box, requiring specific tools and careful execution by an authorized Audi service technician. The process outlined in TSB 2079681/2 includes:

1. Preparation: Two USB-C sticks are required. The technician will prepare these with the necessary software. The update for the AED control unit (078E) is performed manually via the MMI's red menu. This step is skipped if the AED control unit already has software version 0621 or higher.
2. Manual Software Update (AED Control Unit): The technician inserts a USB update medium into the USB connection. They then navigate to the red menu in the MMI, select "Update," and choose the USB connection as the source. All control units to be updated are displayed, and the update process is initiated. It is critical to keep the USB stick inserted throughout this phase.
3. MMI Restart and Initialization: After the manual update completes, the MMI will restart. The technician waits for the MMI to fully initialize and display all apps. The system is then restarted by pressing and holding the volume control for 10 seconds.
4. Verification and USB Removal: The technician opens the notification center and checks the "Audi connect notifications" tab for information. After approximately five minutes, once the download is complete and the procedure has worked (which requires the USB stick to remain inserted), the USB stick can be safely removed. Another system restart is performed to finalize the process.
5. SVM Code Entry: For the emergency call module (0075), gateway (0019), and information electronics (005F), a specific SVM (Software Version Management) code chain is entered using the "SVM - Authorized Multiple Code Entry" function in "Flash" mode. The SVM code chain is 078EA001,DUCDTCPR0075MLB,FLIGHTON0075MLB,ZGDOIP,CL3BPA001US,19A027,19B027,TGU1MDMVB,CL3BPA002US,FLIGHTOFF0075MLB. Technicians are advised to scan a QR code or copy/paste this code to ensure accuracy.
6. Final Checks: The vehicle is put into bus sleep mode, and then the ignition is switched back on, and the MMI is started. The emergency call LED in the roof module is checked to ensure it lights up green. Finally, a diagnostic session is ended, and the log is sent online.

Required Tools and Parts

To perform this software update, Audi service centers will require:

• USB-C Sticks: Two USB-C sticks are necessary for the update media. It is important not to use SD cards with adapters or USB-C sticks with excessively large storage capacities due to formatting differences.
• Software Part Numbers:
  • For the AED control unit update media: Part number 8W0906961DQ.
  • For MIB3 update media (SW versions 4014, 4026, 4404): Part number 8W0906961GB.
  • For MIB3 update media (SW version 4318): Part number 8W0906961GF.
• ODIS Update: The diagnostic tester used must have the latest ODIS (Offboard Diagnostic Information System) update, which includes the new test program for SVM code input.

Warranty Information

This Technical Service Bulletin (TSB) 2079681/2 provides specific guidelines for warranty claims related to this software update. For vehicles outside of warranty, this TSB serves as informational guidance. The relevant service numbers are 9145 for "Complaints about emergency call function or online services" and 9196 for "Complaints about MMI functions," with a damage code of 0041. Labor operations include 0151 0010 for preparation (20 TU) and 0151 0040 for the AED update (100 TU, or 60 TU if step 1 was skipped). Importantly, time stamps are not required for billing under warranty, and non-productive personnel are permitted to perform the update. Guided Fault Finding test plans should not be carried out or invoiced for diagnostic entries resolved by this TSB.

What Owners Should Do

If you own a 2024-2025 Audi model and are experiencing MMI functionality issues or seeing the "Emergency call fault" message, it is recommended to visit an authorized Audi service center. Inform them about the symptoms you are experiencing and mention Technical Service Bulletin 2079681/2. The technicians will be able to perform the necessary software update to resolve the underlying issues, ensuring your MMI system and connectivity box function correctly and addressing the "2025 Audi Q8 MMI Emergency Call Fault" problem.

Source: NHTSA TSB ID 11027335