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Technical Service Bulletin Transaction No.: 2079979/2
91 MMI software update, connectivity box for MIB3 vehicles (version MLB e-tron GT ST3BP without AED) Release date: Dec 4, 2025
Condition
Model(s) Year(s) VIN Range Vehicle Specific Equipment
Software Version:
4026
2024 4404
e-tron GT, and RS e- .
tron GT All Without 1U4 4014
Software Version:
2025
4318
e-tron GT 000831 — 899999 Without Software Version:
2025 With IU4
RS e-tron GT 900950 - 999999 4318

REVISION HISTORY

Revision | Date Purpose

2 - Revised header (Adjusted VIN range)
Revised Condition (Updated model table)

1 11/19/25 | Initial publication

Customer states:

There may be problems with various MMI functions or “Emergency call fault” may be displayed in the instrument cluster.
Workshop findings:

The vehicle still has one of the following software versions in diagnostic address 5F: 4014, 4026, 4318, 4404.

A different TSB may have instructed you to refer to this TSB in the context of a software update for multiple control units.
Technical Background

Software issues.

Production Solution

The new software for the affected control units was implemented in production in model year 2025.
Service

Important information before updating the software

* Diagnostic entries logged in diagnostic address 0075 will be repaired by a software update described in this TSB. The Guided Fault
Finding test plans should not be carried out and cannot be invoiced.

* There will be extended inactive periods for some of the steps. You can work on a different vehicle during this time. This is considered in
the warranty accounting instructions.

CSwhen carrying out this TSB, time stamps are not required for billing under warranty.

* Anewly developed test program is used to input the SVM code. Please ensure that the tester being used has the latest ODIS update.
The new test program for software updates is included in ODIS software.

* Note: The vehicle uses acoustic signals and flashing lights to indicate when user input is required during and at the end of the test
program.

* Important: Please prepare the required USB-C sticks (see parts information) before starting the repair. The update media can be used
for multiple vehicles.

¢ This update package also includes new software for the MIB3 infotainment system. Useful information for MIB3 software updates can be
found in TSB 2060523, 91 M/B3: Software Update Instructions.

Repair procedure

1. Software update for emergency call module (0075), gateway (0019) and information electronics (005F)

Determine the software version in diagnostic address 0019 with SVM code DUCIDENT0019
(SVM — Authorized Multiple Code Entry)

Entry”.

Software version in diagnostic address 0019 = 0042
DUCDTCPR0075MLB,FLIGHTON0075MLB,ZGDOIP,CL3BPA001US,19A027,19B027,TGU1MDMVB,CL3BPA002US,FLIGHTOFF0075MLB

Only software version 0042 in diagnostic address 0019

All other versions in diagnostic address 0019
DUCDTCPR0075MLB,FLIGHTON0075MLB,ZGDOIP,CL3BPA001US, TGU1MDMVB,CL3BPA002US,FLIGHTOFF0075MLB

The test program initially prompts you to use a USB medium (see parts information for part number).
The automatic execution of software updates results in inactive time. This is considered in the warranty accounting instructions.
The USB-C stick can be removed after completing the program.
Note: If the procedure has been interrupted, please repeat step 1. The test program will then automatically perform the missing part of the
update.
2. Bus sleep mode
Put the vehicle in bus sleep mode after performing the software update.
Then switch the ignition back on and start the MMI.
3. Check emergency call LED
Check whether the emergency call LED in the roof module lights up in green again.
If the LED does not turn green, please refer to TSB 2079652 Emergency call LED in roof module not lit up in green.
4. End diagnostic session and send off diagnostic log online.
Warranty
Claim Type: * If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only.
Service Number: Complaints about online services or the emergency call function:
Service number: 9145
Complaints about MMI functions:
Service number: 9196
Damage Code: 0041
Labor Operations: Prepare repair 0151 0010 20 TU
- Vehicle parked
- Charge 12 V battery
Launch software update for MMI and emergency call module |0151 0040 60 TU
- Connect tester, start ODIS
- Flash mode
- Function Authorized Multiple Code Entry
- Copy/paste the code chain ==> Start
- Insert the USB stick.
- Program runs automatically (service technician is not
required)
Claim Comment: As per TSB 2079979/2

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject
to review or audit by Audi Warranty.

When carrying out this TSB, time stamps are not required for billing under warranty.
You are therefore permitted to work on other vehicles at the same time. The update can also be performed by non-productive personnel.

The Guided Fault Finding test plans should not be carried out for diagnostic entries that are repaired by performing this TSB and cannot be
invoiced.

Required Parts and Tools
The following applies when creating the update media:

Please prepare the required USB-C sticks before starting the repair.
You must not use an SD card with an adapter USB stick.
The USB-C stick and downloading the software via the SD creator cannot be invoiced.

General information on USB-C sticks for software updates can also be found in TSB 2060523, 91 M/B3: Software Update Instructions.

MIB3 update media:
Download the software with the corresponding part number onto a USB-C stick (min. USB 2.0 with 32 GB).

Please do not use a USB-C stick with a larger storage capacity as such USB sticks have a different formatting process.

Vehicle type MIB3 SW version § | Part number
e-tron GT 4014 8W0906961GB
4026
4404
e-tron GT 4318 8W0906961GF

Additional Information

All part and service references provided in this TSB (2079979) are subject to change and/or removal. Always check with your Parts Department
and/or ETKA for the latest information and parts bulletins. Please check the Repair Manual for fasteners, bolts, nuts, and screws that require
replacement during the repair.

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