2023 Audi MLB Evo Gateway Software Update TSB

Audi has issued Technical Service Bulletin (TSB) 2078077/1 to address potential functional restrictions in several 2023 Audi models. This TSB focuses on a software update for the data bus diagnostic interface, commonly known as the gateway, which is part of the Audi MLB evo platform.

The issue can manifest as problems with various vehicle functions, including deactivating transport mode, activating the swap function, commissioning and flashing control units, and adapting the 12V battery and high-voltage system. The 2023 Audi e-tron manufacturer_communication highlights that these restrictions stem from the gateway's inability to write data under specific conditions.

Symptoms

Owners may not directly notice symptoms, as this issue is often identified during Pre-Delivery Inspection (PDI) or other diagnostic work. However, the underlying problem can lead to:

• Error messages related to control modules or services.
• Software faults within the Software Version Management (SVM) system.
• Functional restrictions when attempting to deactivate transport mode.
• Difficulties with activating the swap function or commissioning control units.
• Problems adapting the 12V battery or commissioning the high-voltage system.

Diagnosis / Trigger Conditions

The root cause is traced to the data bus diagnostic interface (gateway) having restrictions when writing data under certain conditions. This can impede critical vehicle operations. If the control unit for information electronics J533 (diagnostic address 0019) has software version 0025, it is subject to this TSB and requires an update.

Repair Procedure Summary

The repair involves updating the software for the data bus diagnostic interface J533 (diagnostic address 0019) via the Software Version Management (SVM) system. Here's a summary of the process:

1. Customer Communication: Inform the customer about the software update and that it may neutralize any previous third-party software modifications (e.g., tuning). If the customer declines, they should be informed of potential future issues.
2. High-Voltage Vehicles: For vehicles with high-voltage components, the high-voltage charging cable MUST be unplugged BEFORE the SVM code is entered to prevent damage during the update.
3. Software Version Check: Verify that the control unit J533 (0019) has software version 0025. If it does, proceed with the update.
4. SVM Update: Update the J533 control unit using the ODIS tester in "Flash" mode. The required SVM code is 19A025. This code must be entered precisely using the "Authorized Multiple Code Entry" function. For the 2023 Audi e-tron manufacturer_communication, this step is critical.
5. Post-Update Steps: After the update is complete, unplug the diagnostic connector and any charger from the vehicle.
6. System Reset: Start the engine and let it run for one minute. Then, lock the vehicle and wait for five minutes.
7. Finalization: Conclude the diagnostic procedure via ODIS to clear any event memory entries created during the flashing process.

Required Tools or Parts

To perform this software update, technicians will need:

• An ODIS tester with the latest software (available as of April 16, 2025).
• The SVM code 19A025 (or ZGDOIP,19A025 for direct input).

Owner Action

If you own a 2023 Audi A6, A7, Q7, Q8, e-tron, or any other affected model, and suspect your vehicle may be experiencing these functional restrictions, it is recommended to contact your authorized Audi dealer. They will be able to check your vehicle's software version and perform the necessary update under warranty if applicable. This software update is crucial for ensuring the proper functioning of your vehicle's IT systems and high-voltage components.

NHTSA ID: 11019005