2025 Audi e-tron GT MMI Software Update & Emergency Call Fault

Symptoms

Owners of the 2025 Audi e-tron GT and RS e-tron GT may experience various problems with the Multi Media Interface (MMI) functions. A common indicator of this issue is the display of an "Emergency call fault" message within the instrument cluster. These symptoms are typically linked to outdated software versions within the vehicle's diagnostic address 5F, specifically versions 4014, 4026, 4318, or 4404.

Fault Codes / Diagnostic Addresses

While specific Diagnostic Trouble Codes (DTCs) are not explicitly listed in Technical Service Bulletin 2079979/1, the document indicates that "diagnostic entries logged in diagnostic address 0075" will be addressed and repaired by the software update. This implies that internal fault entries related to the emergency call module are present. The software update targets several key control units: the emergency call module (0075), the gateway (0019), and the information electronics (005F). These diagnostic addresses correspond to critical components responsible for vehicle communication, infotainment, and safety systems.

Diagnosis / Trigger Conditions

Diagnosis for the MMI function problems and the "Emergency call fault" typically begins when a customer reports these symptoms. Technicians will then verify the software version in diagnostic address 5F. If the vehicle is found to have one of the older software versions—4014, 4026, 4318, or 4404—it confirms the need for the software update outlined in TSB 2079979/1. The presence of these specific software versions is a direct trigger condition for applying the bulletin's repair procedure.

Important Warnings and Owner Information

Audi has provided several crucial advisories for this software update:

• Do not bill for Guided Fault Finding: Diagnostic entries that are resolved by performing this TSB should not have Guided Fault Finding test plans carried out or invoiced. This prevents unnecessary charges for diagnosis that the software update will inherently fix.
• Expect inactive periods: The software update process will involve "extended inactive periods" where the vehicle cannot be used. Owners should be aware that their vehicle will be temporarily unavailable during this time.
• USB-C stick requirements: It is critical to prepare the required USB-C sticks before starting the repair. Owners or technicians "must not use an SD card with an adapter USB stick" for the update. Furthermore, "do not use a USB-C stick with a larger storage capacity" than 32 GB, as these larger sticks may have different formatting processes that are incompatible with the update procedure.
• Interrupted procedure: If the software update procedure is interrupted for any reason, it must be repeated from step 1. The test program is designed to automatically perform any missing parts of the update upon restart.
• Emergency call LED check: After the update, if the emergency call LED in the roof module does not turn green, technicians are instructed to refer to TSB 2079652, titled "Emergency call LED in roof module not lit up in green," for further diagnosis and resolution.

Repair Procedure Summary

The repair for the 2025 Audi e-tron GT MMI software update involves a comprehensive software update for the emergency call module (0075), gateway (0019), and information electronics (005F). This process utilizes Audi's Software Version Management (SVM) system to ensure the correct software is installed.

1. Preparation: The vehicle must be parked, and its 12V battery charged. Technicians must prepare the necessary USB-C sticks, which contain the specific software update files.
2. Launch Update: A diagnostic tester is connected, and the ODIS diagnostic system is started. The software update for the MMI and emergency call module is then initiated. This involves entering a specific SVM code chain, such as DUCIDENT0019, into the Function Authorized Multiple Code Entry (SVM) interface.
3. Software Version Determination: The current software version in diagnostic address 0019 is determined to ensure the correct SVM code chain is applied. The TSB lists several SVM codes, including DUCDTCPR0075MLB, FLIGHTON0075MLB, ZGDOIP, CL3BPA001US, 19A027, 19B027, TGU1MDMVB, CL3BPA002US, and FLIGHTOFF0075MLB, which are used based on the specific software configuration.
4. Media Insertion: The test program will prompt the technician to insert the prepared USB-C stick into the vehicle.
5. Automatic Execution: The software update proceeds automatically. The vehicle will provide acoustic signals and flashing lights to indicate when user input is required during and at the end of the test program.
6. Bus Sleep Mode: Following the software update, the vehicle is put into bus sleep mode. The ignition is then switched back on, and the MMI system is started.
7. LED Check: The emergency call LED in the roof module is checked to ensure it illuminates green, confirming proper function. If it does not, further troubleshooting using TSB 2079652 is required.
8. Diagnostic Session Completion: Finally, the diagnostic session is ended, and the diagnostic log is sent online.

Required Tools and Parts

To perform the 2025 Audi e-tron GT MMI software update, specific tools and parts are necessary:

• USB-C Sticks: These are essential for transferring the software update files to the vehicle. The TSB specifies different part numbers based on the current MIB3 software version:
  • For MIB3 SW versions 4014, 4026, and 4404, the required part number is 8W0906961GB.
  • For MIB3 SW version 4318, the required part number is 8W0906961GF.
  • These USB-C sticks must have a minimum capacity of 32 GB. General information on preparing USB-C sticks for MIB3 software updates can also be found in TSB 2060523, "91 MIB3: Software Update Instructions."
• ODIS Diagnostic System: An up-to-date version of the ODIS diagnostic system is required to perform the software update and manage the SVM process.

Warranty Information

Audi outlines specific warranty claim procedures for Technical Service Bulletin 2079979/1. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual. Notably, time stamps are not required for billing under warranty when performing this TSB. This allows technicians to work on other vehicles during the inactive periods of the software update. Furthermore, the update can be performed by non-productive personnel, offering flexibility in workshop management. If the vehicle is outside of its warranty period, this TSB serves as informational guidance rather than a covered repair. The service numbers for warranty claims are 9145 for complaints about online services or the emergency call function, and 9196 for MMI function complaints. The associated damage code is 0041. Labor operations include 0151 0010 (20 time units) for preparing the repair and 0151 0040 (60 time units) for launching the software update.

NHTSA ID: 11026268