2023-2025 Audi MMI Infotainment and Connectivity Issues TSB

Audi Technical Service Bulletin (TSB) 2079416/3, released on December 11, 2025, provides a comprehensive overview of customer service packages designed for MLB and MQB platform vehicles that utilize the MIB3 infotainment system. This bulletin specifically addresses various complaints related to infotainment and connectivity, which may manifest as a "Connection offline" message or other system malfunctions. The TSB details the necessary software updates and procedures to resolve these Audi MMI connectivity issues following UNECE deployment.

Symptoms of MMI Connectivity Issues

Owners of affected Audi vehicles may experience different problems with their infotainment and connectivity systems. The primary symptom identified is a "Connection offline" message displayed within the vehicle. Beyond this specific message, the TSB notes "various complaints regarding infotainment and connectivity," indicating a broad range of potential malfunctions within the MIB3 system that impact the vehicle's ability to maintain a stable connection or provide expected infotainment functions.

Technical Background

TSB 2079416/3 serves as an essential guide for technicians, providing an overview of the customer service packages applicable to MLB and MQB vehicles equipped with the MIB3 system. These packages are designed to update and improve the functionality of the infotainment and connectivity features. Depending on the specific vehicle model and its configuration, several control units may require software updates as part of these service packages to effectively resolve Audi MMI connectivity issues.

Control Units Involved

The MIB3 system relies on several interconnected control units. The following diagnostic addresses and their corresponding control unit names are identified as potentially requiring updates:

• 0x005F: Control unit 1 for information electronics
• 0x0075: Emergency call module and communication unit
• 0x0019: Data bus diagnostic interface (gateway)
• 0x078E: Android control unit 2 (fitted on vehicles with PR number IU4)

It is important to note that diagnostic address 0x078E, which corresponds to the Android control unit 2, functions as a sub-participant of address 0x005F. Therefore, it may not appear independently in the control unit overview during diagnostic scans.

Diagnosing Android Control Unit Software

To accurately determine the software version of the Android control unit, technicians should follow a specific six-step procedure:

1. Enter Flash mode on the diagnostic tool.
2. Access the SVM-Authorized Multiple Code Entry function.
3. Input the specific code DUCIDENT005F.
4. When prompted, answer the question about sub-participants with "yes."
5. Navigate through the system to select the sub-participant identified with the system name "Android control unit."
6. Proceed to read the current software version of this unit.

Production Solution

This bulletin clarifies that the software solutions described are intended for service work in the field and are not deployed in series production vehicles. This means updates are applied during vehicle servicing rather than during the manufacturing process.

Service Procedure Overview

This TSB acts as a reference point, directing technicians to specific software update TSBs based on the vehicle's platform and equipment. If a technician is directed to TSB 2079416/3 from another referring TSB, they should use the information below to identify the correct update package for the vehicle.

MLB Gen1 Platform (A4, A5, Q5)

For vehicles built on the MLB Gen1 platform, including the A4, A5, and Q5 models, several service packages are available depending on the specific configuration:

• TSB 2079671: "91 Software update for MMI, connectivity box for MIB3 vehicles (version MLB G1 ST3BP with AED)"
• TSB 2079904: "91 Software update for MMI, connectivity box for MIB3 vehicles (version MLB G1 ST3BP without GW + AED)"
• TSB 2079813: "91 Software update for MMI, connectivity box for MIB3 vehicles (version MLB G1 ST3BP without GW without AED)"
• TSB 2079670: "91 Software update for MMI, connectivity box for MIB3 vehicles (version MLB G1 ST3BP without AED)"

MLB Gen2 Platform (A6, A7, A8, Q7, Q8)

For vehicles built on the MLB Gen2 platform, such as the A6, A7, A8, Q7, and Q8 models, the following service packages apply:

• TSB 2079681: "91 Software update for MMI, connectivity box for MIB3 vehicles (version MLB G2 ST3BP with AED)"
• TSB 2079680: "91 Software update for MMI, connectivity box for MIB3 vehicles (version MLB G2 ST3BP without AED)"

e-tron GT Platform

For e-tron GT models, specific MMI software updates are available:

• TSB 2079979: "01 MMI software update, connectivity box for MIB3 vehicles (version MLB e-tron GT ST3BP without AED)"
• TSB 2079980: "MMI software update, connectivity box for MIB3 vehicles (version MLB e-tron GT ST3BP with AED)"

MQB Platform (A3, Q3)

For vehicles on the MQB platform, including the A3 and Q3, the update is anticipated by "End of Q1/26."

Important Warranty Information

Owners and technicians should be aware of the specific warranty instructions provided in this TSB. "Please do not bill for repairs under this TSB." This TSB is explicitly for reference only. All billing information and detailed instructions for the software update procedures can be found in the relevant, specific TSBs that are referenced within this document. Always consult the appropriate TSB for complete warranty claim details and repair instructions.

Revision History

This Technical Service Bulletin has undergone several revisions to ensure accuracy and provide updated information:

• Revision 3 (Date not specified): Included a revised Condition (with an added model table), revised Technical Background (with added information), and revised Service (with an updated ETA for MQB platform vehicles).
• Revision 2 (October 30, 2025): Revised the Service section to include an updated service solution.
• Revision 1 (September 26, 2025): Initial publication of the bulletin.

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Source: NHTSA ID 11027365