2021-2022 Audi MIB3 Connectivity Issues

Symptoms of Audi MIB3 Connectivity Issues

Owners of certain 2021-2022 Audi vehicles may experience various connectivity problems. These Audi MIB3 connectivity issues manifest as a failure of several key features. According to Audi Technical Service Bulletin (TSB) 2061345/1, customer complaints often include:

• "Audi connect features like weather, news, satellite maps, Sirius 360, or key user login are not working."
• "The vehicle's Wi-Fi connection is not available."
• "The vehicle's Bluetooth connection is not available."

These issues indicate a disruption in the vehicle's ability to communicate with external networks and devices.

Technical Background: MIB3 System Architecture

The underlying cause of these connectivity problems lies in the updated network architecture introduced with the MIB3 infotainment system and the ConBox High module. In previous systems, Bluetooth, Wi-Fi, and cellular internet services (Audi connect) were often integrated directly into the MIB3 Main Unit.

With the new architecture, these critical connectivity features are now integrated into the telematics control module, identified as J949 (address word 0075). This J949 module effectively functions as the vehicle's internet router, managing all incoming and outgoing data for these services. Some vehicle models also utilize remote Wi-Fi/Bluetooth antennas that connect directly to this J949 module.

Figure 1 in the TSB illustrates this MIB3 system architecture, showing how components like the Phone box, LTE aerial 3, Emergency call aerials, Wi-Fi, eSIM, and Connectivity box high (which houses the J949 module) are interconnected and interface with the MIB3 and Gateway.

Diagnosis and Service Advice

For technicians diagnosing Audi MIB3 connectivity issues, Audi TSB 2061345/1 provides specific guidance. Since the J949 telematics control module now handles Bluetooth, Wi-Fi, and Audi connect functions, troubleshooting efforts should commence with this module. If no other Diagnostic Trouble Codes (DTCs) or specific test plans are present in the vehicle, the J949 (address word 0075) should be the starting point for investigation.

It's important to note that the TSB states that the production solution for these issues is "Not applicable," implying that the design change is fundamental to the MIB3 system and not a defect to be corrected by a production modification.

Important Note for Owners

This Technical Service Bulletin (TSB) 2061345/1 is classified as "informational only" by Audi and is explicitly stated as "not applicable to any Audi Warranty." This means that repairs related to the conditions described in this TSB may not be covered under warranty, and owners should clarify potential costs with their service center.

Additionally, all part and service references mentioned in this TSB (2061345) are subject to change. Technicians are advised to consult the latest information from the Parts Department and/or ETKA, as well as the Repair Manual for any fasteners, bolts, nuts, and screws that require replacement during service.

Source: NHTSA ID 10183468