2021-2025 Audi Connect Online Connection Fault TSB

Audi has released Technical Service Bulletin (TSB) 2077616/4 to address a specific condition affecting the Audi Connect system in certain 2021-2025 Audi A3, S3, RS 3, and Q3 models. This TSB focuses on instances where vehicles experience an Audi Connect online connection fault after a visit to a workshop, particularly if the Vehicle Key Management System (VKMS) was calibrated or a control module was replaced during that visit.

The Audi Connect online connection fault can manifest in various ways, impacting several online services and remote functionalities that modern Audi owners rely on. This bulletin provides a detailed procedure for diagnosing and resolving the underlying software issue.

Symptoms of the Audi Connect Online Connection Fault

Owners may notice a range of issues indicating an Audi Connect online connection fault. These symptoms typically arise after a recent workshop visit where specific procedures were performed. Common complaints include:

• Traffic Information System: The online traffic information system may display "functionality -> no function" or "traffic info (online) reception functionality -> faulty."
• Online Services: The configuration for online services may be "functionality -> not adjustable," and online system updates may show "functionality -> cannot be ended."
• Remote-Controlled Features: Functions like switching on parking cooling, remote-controlled parking A/C, remote-controlled door unlocking, switching auxiliary heater on, remote-controlled parking heater, and remote-controlled high-voltage battery charging may exhibit "functionality -> no function" or "functionality -> faulty."
• myAudi App Connectivity: The myAudi app may have "permanently had no connection to the vehicle," and remote departure time programming via the app may show "functionality -> no function."
• User Login: The vehicle user may "cannot log in or be created."
• Emergency Call System: The emergency call LED in the roof module next to the SOS button may "not light up green."

Fault Codes and Control Units Affected

During diagnosis, one or more control units may be confirmed with "ERROR CODE: 33" in the overall status of the VKMS calibration within Guided Fault Findings. This error indicates that the Vehicle Key Management System (VKMS) activation was not performed successfully.

The following components, when showing "ERROR CODE: 33", are specifically mentioned:

Component	Status / Error Code
Information electronics 1	ERROR-CODE: 33
Emergency call module and communication unit	ERROR-CODE: 33
Antenna module	ERROR-CODE: 33
Software Cluster Housekeeping 1	ERROR-CODE: 33

Other control units that, if a "Replace control module" test program was performed on them, could lead to this issue include:

• 0019 - Data bus diagnostic interface
• 005F - Control unit for information electronics
• 00C6 - Charging unit for high-voltage battery
• 8107 - Aerial module
• 0075 - Emergency call module and communication unit

Important Warnings for Owners and Technicians

Audi has issued several notices regarding this TSB:

• This TSB only applies if the vehicle's last visit to the workshop was after March 2, 2025 and before May 5, 2025 AND the VKMS was calibrated during this visit.
• The VKMS calibration can also be performed as a separate test program.
• The VKMS calibration is part of many "Replace control module" test programs.
• The fault may occur after a "virtual replacement," meaning the control unit was not physically replaced, but the "Replace control module" test program was performed.
• A change in the manufacturer's IT infrastructure was performed on May 5, 2025. VKMS calibration can be performed successfully again after this date.
• If the LED in the roof module next to the SOS button does not light up green, the emergency call system is not activated correctly. In such cases, contact the Technical Assistance Center (TAC) with TSB number 2077616 for further assistance.

Technical Background

The root cause of this Audi Connect online connection fault is identified as a software issue within the manufacturer's IT infrastructure. This issue specifically impacted vehicles serviced during the period from March 2, 2025, to May 5, 2025.

Repair Procedure Summary

To resolve the Audi Connect online connection fault, a specific service procedure outlined in TSB 2077616/4 must be followed. The measure comprises several steps:

1. Performing a New VKMS Calibration: An authorized Audi technician will perform another (new/fresh) VKMS calibration using the vehicle diagnostic tester.
2. Waiting for Chassis Number Erasure: The technician must wait for the vehicle's chassis number to be automatically erased from Audi's IT infrastructure.
3. Recalibrating VKMS: After the chassis number has been erased, the VKMS calibration procedure is performed again.
4. Checking SOS Button LED: The status of the LED in the roof module next to the SOS button is checked. To do this, the ignition is switched on and then off (terminal 15 cycled). The LED should remain green for a few minutes after the ignition is switched off.

Successful VKMS calibration is indicated by the diagnostic tool displaying either "VKMS data OK" or "VKMS data OK - FAZ002399E."

If one or more control units still show a different status after the initial calibration attempt, the VKMS must be calibrated again after switching terminal 15 off and on. This involves:

• Switching terminal 15 off and on again.
• Exiting diagnosis completely to automatically erase any passive event memory entries.
• Locking the vehicle and placing the key at least 50 feet away for 30 minutes to allow the bus sleep cycle to complete.
• If the customer complaint remains unresolved, the test program "0075 - Control module restart" must be performed.

Warranty Information

For vehicles still under warranty, claims for this repair should be submitted in accordance with the Audi Warranty Policies and Procedures Manual. Claims are subject to review and audit by Audi Warranty. If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only.

• Service Number: 9107
• Damage Code: AS39
• Labor Operations:
  • GFF / Guided Functions (Code: 0150 0010) - Refer to SRT for associated operations.
  • GFF / Guided Functions (Code: 0150 0060) - Labor according to the diagnostic log.
  • Check vehicle (bus sleep mode) (Code: 0689 0199) - Allocated 10 TU (Time Units).
• Claim Comment: As per TSB 2077616/4.

Revision History

Technical Service Bulletin 2077616/4 has undergone several revisions:

• Revision 4: Revised the Production Solution, specifically adding a week of production change.
• Revision 3 (May 22, 2025): Revised the Condition section (updated date range), Technical Background (updated date range), and Service section (updated instructions).
• Revision 2 (May 5, 2025): Revised the Service section (updated instructions).

---

Source: NHTSA ID: 10248882