2025 Audi Driver Assist Systems Not Working TSB 2079926/1

Audi has issued Technical Service Bulletin (TSB) 2079926/1 to address an intermittent issue affecting various driver assistance systems in certain 2025 Audi models. Owners may experience situations where advanced safety and convenience features are sometimes unavailable or not functioning as expected. This TSB outlines a software-related problem and provides the necessary steps for dealerships to resolve it through a software update.

The core of the problem lies with the vehicle's software, specifically impacting the functionality of multiple driver assistance features. If you own a 2025 Audi and notice your 2025 Audi driver assist systems not working reliably, this bulletin provides crucial information regarding the diagnosis and repair.

Symptoms of Malfunction

Owners of affected 2025 Audi vehicles may observe the following issues, where the specified driver assist system exhibits a "no function" state:

• Lane Assist and Lane Departure Warning: This system actively helps steer the vehicle to maintain its position within the lane markings or provides an alert if the vehicle begins to drift without a turn signal. When it experiences a "no function" state, drivers lose this crucial support, potentially leading to increased driver fatigue on long journeys and a higher risk of unintentional lane departures, especially in adverse weather or low-visibility conditions.
• Camera Systems and Road Sign Detection: The vehicle's forward-facing cameras are vital for identifying and interpreting traffic signs, such as speed limits, no-passing zones, and yield signs. A malfunction means the driver will not receive these visual cues on the instrument cluster or head-up display, requiring greater reliance on manual observation and potentially leading to missed signs or violations.
• Cross-Traffic Assist and Cross-Traffic Warning: Particularly useful when backing out of parking spaces or navigating busy intersections with limited visibility, this system detects vehicles approaching from the side. A "no function" status removes this critical warning, significantly increasing the risk of a collision with unseen cross-traffic.
• Lane Change Assistance: This advanced feature assists drivers during lane changes by monitoring blind spots and providing steering support to guide the vehicle smoothly into the adjacent lane. If this assistance is unavailable, drivers must rely solely on mirrors and head checks, which can be less effective and increase the potential for side-swipe accidents, especially in heavy traffic.
• Activating Driver Assistance: This general complaint indicates a broader issue where the vehicle's ability to engage or utilize any of its driver assistance features is compromised. It means that even if individual systems are technically present, the driver cannot activate them, rendering a suite of safety and convenience technologies unusable.
• Emergency Braking Function (Front Assist): As a cornerstone of modern vehicle safety, Front Assist uses radar and camera sensors to detect potential frontal collisions and can automatically apply the brakes to mitigate or prevent an impact. A "no function" condition for this system is a severe safety concern, as it removes a vital layer of protection against common accident scenarios.
• Parking Aid, Park Assist, and Rear Traffic Alert: These systems provide invaluable assistance during parking, using sensors to detect obstacles around the vehicle and alert the driver. Rear Traffic Alert specifically warns of vehicles approaching from the side when reversing. Their malfunction makes parking more difficult and significantly increases the risk of low-speed collisions with objects or other vehicles.
• Exit Warning System: Designed to prevent "dooring" incidents, this system alerts occupants to approaching vehicles or cyclists from the rear when they are about to open a door. A non-functional system removes this warning, putting occupants and other road users at risk, particularly in urban environments.
• Emergency Assist and Automatic Emergency Assist Activation: In scenarios where the driver becomes unresponsive, Emergency Assist can detect this condition and safely bring the vehicle to a controlled stop, activating hazard lights and potentially contacting emergency services. If this system fails to activate, a critical safety net for driver incapacitation is lost.
• Cruise Control and Adaptive Cruise Control System: While primarily convenience features, these systems also contribute to safety by reducing driver fatigue and maintaining safe following distances. A "no function" state for adaptive cruise control means the vehicle will not automatically adjust its speed to traffic flow, requiring constant manual intervention and potentially leading to unsafe following distances if the driver is not vigilant.

These symptoms are typically intermittent, meaning the systems may work at some times and fail at others. If the issue is continuous and cannot be resolved by simply restarting the vehicle or allowing it to enter a bus sleep cycle, further diagnosis beyond this TSB is required.

Important Warning for Owners and Technicians

Audi has provided a critical notice within TSB 2079926/1:

"This TSB will not solve the problem if the complaint occurs continuously or cannot be remedied by switching the vehicle off and on again or performing a bus sleep cycle. In this case, please continue the diagnosis."

This means that if your driver assist systems are always non-functional, or if a simple restart doesn't temporarily resolve the issue, this specific software update may not be the solution. In such continuous failure scenarios, technicians are instructed to perform more in-depth diagnostic procedures to identify the root cause.

Technical Background

The underlying cause for the intermittent 2025 Audi driver assist systems not working is identified as a software issue. This indicates that the vehicle's control modules, particularly the 00A5 - Front sensor for driver assistance systems, are experiencing glitches or errors in their programming that lead to the described malfunctions. The TSB notes that a production change was implemented in week 36 of 2025 to address this issue in newly manufactured vehicles, suggesting that vehicles produced after this date should not exhibit the same problem.

Repair Procedure Summary

The resolution for the intermittent driver assist system malfunctions involves a software update. Technicians are instructed to check for and perform a combined software update, specifically referencing TSB 2079690. This update package, identified as "00 Combined software update 03.10.00/C (28.13.01) KD2", is designed to correct the programming errors affecting the various assistance systems.

During the update process, the vehicle's front sensor for driver assistance systems (diagnostic address 00A5), which may currently be running software versions such as 0250 or 0295, will be reprogrammed to the latest version. This procedure ensures that all affected control units receive the necessary software patches to restore full functionality to the driver assistance features. The update process typically requires connecting a battery charger to maintain stable voltage throughout the procedure. It may also involve a fixed rate labor operation (0151 0040) covering all necessary preliminary and follow-up work, including a bus sleep cycle and calibration drive to ensure proper system operation after the update. If the software flashing process is interrupted, additional steps are included to restart the update.

Warranty Information

For vehicles still under warranty, the software update described in TSB 2079926/1 should be performed free of charge. Audi's warranty policies and procedures manual governs all claims. The TSB specifies the following codes for warranty claims:

• Claim Type: This TSB is informational only if the vehicle is outside of its warranty period.
• Service Number: Specific service numbers are provided for different vehicle configurations: 9638 (for vehicles with PR number GJ0) and 9093 (for vehicles with PR number GJ6).
• Damage Code: The designated damage code for this issue is KD02.
• Labor Operations:
  • 0151 0010: This operation covers the software update itself, including the essential step of connecting a battery charger to prevent voltage drops during the process.
  • 0151 0040: This is a fixed-rate labor operation covering all required preliminary and follow-up work associated with the software update. This includes ensuring a bus sleep cycle, performing a calibration drive to verify system functionality, and any necessary steps to restart the software update if the flashing process is aborted. This operation is assigned 130 Technical Units (TU).
• Claim Comment: All claims must be submitted with the comment "As per TSB 2079926/1".

When performing the combined software update under warranty, time stamps are not required for billing, and the update can be performed by non-productive personnel. Owners should contact their authorized Audi dealership to schedule the necessary service.

Source: NHTSA ID: 11026253