2018-2026 Audi Advanced Key Door Sensor Inoperative TSB

Owners of 2018-2026 Audi vehicles may occasionally find their Audi advanced key inoperative when trying to lock or unlock their doors using the touch sensors. This doesn't necessarily indicate a fault, but rather specific conditions or normal operational characteristics of the advanced key system. Audi Technical Service Bulletin (TSB) 57 24 53 2027368/6, which supersedes TSB 24-43, provides detailed explanations for these occurrences.

This bulletin was last revised on July 31, 2024, with updates including the addition of 2025 model years and revised technical background information.

Symptoms

If your Audi advanced key door handle touch sensors are inoperative, you might notice the following:

• The exterior door handle touch sensors (Audi advanced key) do not respond on one or several doors.
• You can still unlock and lock the vehicle mechanically using the key blade in the driver door or trunk, or electrically using the key remote buttons.

Diagnosis and Trigger Conditions

Several concept-related restrictions and external factors can cause the Audi advanced key inoperative condition. These are not malfunctions but rather normal system behaviors or interferences:

1. Signal Interference: Audi advanced key functions can be temporarily disabled by interference from other transmitters operating in the same frequency range. This includes devices like cell phones, wireless headphones, or other vehicle keys in close proximity to your remote key.
2. Simultaneous Lock/Unlock Command: If you reach into the door handle to open it while simultaneously touching the lock sensor to lock the vehicle, it will not lock. The system prioritizes the unlocking command, which has a higher priority in this scenario.
3. Quick Grab: The Audi advanced key system requires a short response time to identify the key. If the door handle is grabbed and pulled very quickly, the key may not be identified in time, and the vehicle will not unlock.
4. Brief Lock Confirmation Period: After locking the door, there is a brief period where unlocking is not possible. This allows you to check that the door is securely locked by pulling the handle.
5. External Device Interference: Signals from an external device plugged into the 12V socket or USB connection can interfere with the advanced key function.
6. Power Saving Deactivation: To reduce power consumption, the door handle touch sensors may deactivate after the vehicle has been parked for a few days. For specific models like A3 (8V), A4 (8K), A5 (8T, 8F), A6/A7 (4G), A8 (4H), Q3 (8U), Q5 (8R), and R8 (4S), you will need to pull the door handle once to 'wake' the vehicle, and then a second time to open it. Locking in this situation is only possible after an ignition cycle.
   • For Q7 (4M), A4 (8W), and A5 (F5) models up to production 45/2016, the ignition must be switched on for the advanced key to work again.
   • For all other models, the door handle sensors no longer switch off after a stationary period.
7. Discharged Battery: If the vehicle battery is discharged, the energy management system gradually deactivates non-essential convenience functions. This can temporarily prevent the vehicle from unlocking with the Audi advanced key.
8. Environmental Factors: Dirt, snow, and salt can affect the conductivity of the door handle, influencing its functionality.

Important Warnings

Owners should be aware that this Technical Service Bulletin 57 24 53 2027368/6 is purely informational. It is not applicable to any Audi warranty, meaning any diagnosis or explanation of these conditions at a dealership may not be covered under warranty.

Owner Action

If you experience your Audi advanced key inoperative symptoms, it is important to understand that these conditions are often normal or caused by external factors rather than a defect. If you are concerned, you can visit an authorized Audi dealer. The service procedure for this TSB involves explaining these concept-related restrictions to the customer. There is no specific repair or part replacement outlined in this bulletin to address these conditions, as they are generally not considered faults requiring repair.

Source: NHTSA ID: 11005904