2021-2026 Audi Advanced Key Inoperative TSB 2027368/7

Audi has released Technical Service Bulletin (TSB) 2027368/7, titled "57 Door handle touch sensors (Audi advanced key) inoperative," to address situations where the advanced key system may not function as expected. This TSB, last revised as Revision 7 and released on July 31, 2025, clarifies various conditions that can cause the door handle touch sensors to appear inoperative, affecting keyless entry and locking for a wide range of Audi models from 2008 to 2025. For example, if you experience a 2021 Audi e-tron advanced key inoperative condition, this document explains the potential causes.

Revision History

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

• Revision 7: Updated customer codes, service verbiage, and warranty verbiage, and an image was added.
• Revision 6 (July 31, 2024): The header was revised to include 2025 model years.
• Revision 5 (May 23, 2024): The header was revised to include all models up to model year 2024, and the technical background was updated with new concepts and models.

Symptoms of an Inoperative Advanced Key

Owners may observe several symptoms indicating that their Audi Advanced Key system is not functioning correctly. These can include the convenience opening or closing features not working, the vehicle's locking or unlocking mechanism being inoperative, or the door release functionality being partially out of order or completely unable to be released. In some cases, the door locking mechanism may also be partially out of order or unable to lock the vehicle. These issues specifically relate to the door handle touch sensors, while the key blade (for mechanical unlocking via the driver door or trunk) or remote buttons (for electrical unlocking) typically remain functional.

Understanding the "Inoperative" Condition

The TSB explains that the advanced key's perceived inoperability is often not a system fault but rather a result of specific environmental or operational conditions. These are considered concept-related restrictions and include:

1. Smartphone Interference: If the key is in direct vicinity of a smartphone (e.g., in the same coat pocket), the advanced key function may be affected by interference from phone signals.
2. Other Transmitter Interference: The advanced key function may be temporarily switched off if other transmitters operating in the same frequency range are present. This includes mobile phones, TV broadcasters, wireless headphones, remote controls for cranes, baby monitors, carports with photovoltaic systems, active inverters, and other vehicle remote controls.
3. Locking/Unlocking Conflict: If a customer reaches into the door handle while simultaneously touching the lock sensor to lock the vehicle, the unlocking range of the sensor is activated. Since unlocking has a higher priority than locking, the vehicle cannot be locked in this way. This behavior is illustrated in Figure 1 of the TSB, showing a hand reaching for the door handle while touching the lock sensor.
4. Quick Grab and Pull: The Audi advanced key system requires a short response time for key identification. If the door handle is grabbed and pulled very quickly, the key may not be identified, and the vehicle will not unlock.
5. Brief Lock Period: After the door is locked, unlocking it is not possible for a brief period. This allows the customer to confirm that the door is securely locked by pulling the handle.
6. External Device Interference: Signals from an external device plugged into the 12V socket or USB connection can interfere with the advanced key function.
7. Power Consumption Deactivation: For models such as the A3 (8V), A4 (8K), A5 (8T, 8F), A6/A7 (4G), A8 (4H), Q3 (8U), Q5 (8R), and R8 (4S), the door handle touch sensors are deactivated after the vehicle has been parked for a few days to reduce power consumption. To open the vehicle, the door handle must first be pulled once to