2023-2026 Audi Anti-Theft Alarm Activates TSB

Symptoms of an Erratic Anti-Theft Alarm

Owners of 2023-2026 Audi vehicles may experience their anti-theft alarm activating unexpectedly without any apparent reason. Conversely, the alarm might fail to activate when it should. These issues can occur without any associated diagnostic trouble codes (DTCs) being stored in the vehicle's system.

If your Audi e-tron alarm activates randomly, or if you notice it's not working as expected, it's important to have it checked. This TSB addresses these specific concerns.

Diagnosis and Trigger Conditions

Since no DTCs are typically stored for this condition, diagnosis involves accessing specific diagnostic addresses and measurement value blocks within the vehicle's control units to retrieve alarm history data. This data helps technicians understand why and when the anti-theft alarm activated.

The diagnostic process varies slightly depending on the specific Audi model and platform:

• A3 (8P) and Q3 (8U): Technicians will check diagnostic address 09 and review measurement value blocks 18-23 for activation reasons, dates, and times.
• A3 (8V), TT (FV): Diagnostic address 09 is used to access the "alarm history data" measurement value.
• A3 (8Y), Q3 (F3, FJ), A5 (FU), A6 (FN), A6 e-tron (GH), Q5 (GU), Q6 (GF): Diagnostic address 0009 is accessed. Technicians look at measured values such as "History data anti-theft protection," "Cause of alarm trigger," and "Anti-theft alarm history data for alarm trigger."
• Q4 (F4): Diagnostic address 0019 is used to find "Anti-theft alarm history data for alarm trigger" measurement values.
• A4 (8K), A5 (8T), A5 Cabriolet (8F), Q5 (8R), A6 (4G), A7 (4G), A8 (4H), R8 (4S), TT (8J) model year 2010-2014, R8 (42) from MY 2010: Diagnostic address 46 is checked, focusing on measurement value blocks 18-24 for alarm activation details.
• A6 (4F) and Q7 (4L): Diagnostic address 46 is used, specifically measurement value block 16.
• A4 (8W), A5 (F5), A6 (4A), A7 (4K), A8 (4N), Q5 (FY), Q7/Q8 (4M), e-tron (GE), e-tron GT (F8): Diagnostic address 46 is consulted for "history data of anti-theft protection," "history data of panic alarm," and "anti-theft alarm history data for alarm triggering."

If the alarm was "triggered by ILM" (convenience control unit J393) or by an "external system," the actual cause is often found in more detailed measurement values like 21-24 or within the "history data anti-theft protection." For vehicles with PR number 5P2 (Rear occupant detection), technicians will also investigate if the occupant detection system mistakenly triggered the alarm, which would typically sound the regular horn instead of the anti-theft alarm horn. This detailed diagnostic approach helps pinpoint why your Audi e-tron alarm activates or fails to.

Repair Procedure Summary

The TSB focuses on a thorough diagnostic process rather than a specific repair. Technicians use specialized diagnostic tools to connect to the vehicle and retrieve the alarm history data from the relevant control modules. By analyzing the measurement values and activation reasons, they can determine the precise cause of the anti-theft alarm's erratic behavior. Once the root cause is identified, the appropriate repair can be performed based on Audi's repair guidelines.

Owner Action

If you are experiencing issues with your Audi's anti-theft alarm, such as it activating without reason or failing to activate, you should schedule an appointment with an authorized Audi service center. Technicians will follow the diagnostic procedures outlined in TSB 2056019/5 to investigate the problem.

Repairs performed under this Technical Service Bulletin may be covered by your vehicle's warranty, provided they align with Audi's warranty guidelines. If your vehicle is outside of warranty, this bulletin serves as informational guidance for diagnosis. The damage code associated with this issue is 00XX, and labor operations typically fall under "GFF / Guided Functions."

NHTSA ID: 11028397