2021-2024 Audi MIB3 Infotainment Software Update TSB 2076404/5

Audi Technical Service Bulletin (TSB) 2076404/5 outlines a deployment overview for customer service packages intended for MLB and MQB platform vehicles equipped with the MIB3 infotainment system. This TSB, released on September 8, 2025, addresses general "complaints regarding the infotainment and connectivity systems" that owners may experience.

The purpose of TSB 2076404/5 is to provide an overview of these planned software updates. It serves as a reference for technicians, detailing which control units might be updated and which specific software update TSBs apply to different vehicle platforms. Owners of a 2021 Audi e-tron and other affected models experiencing infotainment issues should be aware of this bulletin.

What This TSB Covers

This bulletin details the planned deployment of customer service packages for Audi vehicles featuring the MIB3 infotainment system, along with connectivity box, OCU3, and LSR components. These packages contain new and final target software designed to improve infotainment and connectivity functionality. The update process will vary depending on the specific vehicle model.

Affected Vehicle Platforms and Model Years

The customer service packages apply to various Audi models built on the MLB and MQB platforms. The model years covered by these updates include:

• MQB 35/37 platform: Model years 2022-2024
• MLB Pr 35/37 platform: Model years 2021-2024
• MLB High 35/37 platform: Model years 2020-2023
• MLB High 31/32/33 platform: Model year 2021

Relevant Control Units

The software updates outlined in the customer service packages may involve several control units within the vehicle's infotainment and communication systems. These include:

Diagnostic address	Control unit name
0x005F	Control unit 1 for information electronics
0x0075	Emergency call module and communication unit
0x0693	Volume regulator

Associated Software Update TSBs

This overview TSB 2076404/5 refers to specific software update bulletins that contain the actual MMI software updates. These include:

• TSB 2079133: This bulletin details the "91 MMI software update, connectivity box for MIB3 vehicles (NAR version ST37)". It applies to Audi A4, A5, A6, A7, A8, Q3, Q5, Q7, Q8, e-tron Quattro/Sportback, and Q8 e-tron models.
• TSB 2079134: This bulletin covers the "91 MMI software update, connectivity box for MIB3 vehicles (NAR version ST37+LSR)". It applies to Audi A3 and e-tron GT models.

Applicable Software and Hardware Versions

For the 005F - Information electronics control unit, the following software versions are referenced in the context of these updates:

• Software versions: 31, 32, 33, 36, 38

Relevant PR Numbers

This TSB also references various PR numbers, which are option codes used to identify specific vehicle configurations. These codes help technicians determine the applicability of updates. Examples of PR numbers mentioned include:

• ?:or?:with ER5?:and?:without QW5
• ?:with ER3?:and?:without B39?:and?:without QW5
• ?:with B30?:and?:without QW5
• ?:with ER1?:and?:without QW5
• ?:with ER7?:and?:without QW5
• ?:with ER4?:and?:without B39?:and?:without QW5
• ?:with ER6?:and?:without QW5
• ?:with B24?:and?:without QW5
• ?:or?:with ER1 ?:and?: without 18W?:and?:without I8Y?:and?:without QW5
• ?:with ER3?:and?:without B39?:and?:without I8W?:and?:without I8Y?:and?:without QW5
• ?:with ER5?:and?:without QW5
• ?:with B30?: and?:without QW5
• ?:with ER4?:and?:without B39?:and?:without I8W?:and?:without I8Y
• ?:with ER7?:and?:without QW5
• ?:with B24?:and?:without QW5
• ?:with ER6?:and?:without QW5

Important Information for Owners

Owners should be aware that this TSB 2076404/5 is informational only and does not directly apply to any Audi Warranty claims. The software mentioned in these customer service packages is intended for service updates only and is not deployed in series production vehicles. For specific warranty accounting instructions and detailed update procedures, technicians are referred to the individual TSBs (like 2079133 and 2079134) that describe the actual MMI software update for the 2021 Audi e-tron and other models.

NHTSA ID: 11023771