2024-2025 Audi Key Adaptation Issue TSB 57 24 66 2075132/2

Symptoms

Owners typically do not experience symptoms related to this issue until new keys need to be adapted to the vehicle's immobilizer system. During this process, technicians may find that it is not possible to adapt additional keys for the vehicle, or that the keys are not recognized by the vehicle during the adaptation procedure. This prevents new keys from being programmed and used with the vehicle.

Technical Background

The root cause of the problem, as described in Audi TSB 57 24 66 2075132/2, lies in the entry and start system. When attempting to adapt keys, the key information cannot be reliably read via interior aerial 1. This unreliability is attributed to resonance frequencies that occur between the key's transponder and the interior aerial 1 for the entry and start system.

Diagnosis

To confirm if the issue is related to this TSB, technicians should perform a diagnostic check. This involves reading the measured value "Key identification" ID 02F8 from the onboard supply control unit (diagnostic address 0009) using a workshop tester. The reading should be taken in cycles of approximately one minute, with the vehicle key placed on the reader coil. The measured value contains the key's part number, hardware number, and software number. If errors occur during this process, such as the value changing to "not OK", it strongly indicates that this TSB applies to the 2025 Audi S3 key not recognized issue.

Repair Procedure Summary

To resolve the key adaptation issue, technicians need to perform a specific procedure:

1. Access Interior Aerial 1: Gain access to the interior aerial 1, which is part of the entry and start system.
2. Position Socket: Place a 1/2-inch 13mm socket made of chromium-vanadium steel onto the aerial. This step is crucial for creating the correct conditions for key adaptation.
3. Adapt Key: With the socket in place, adapt the key using the standard workshop tester and its corresponding test program.

Important Warnings

When performing the key adaptation, it is critical to follow the instructions precisely. Technicians are specifically advised: "When adapting the immobilizer, place the key on the reader coil and not on the socket."

Required Tools or Parts

To perform the repair described in this TSB, a 1/2-inch 13mm socket made of chromium-vanadium steel is required.

Warranty Information

Audi states that this Technical Service Bulletin 57 24 66 2075132/2 is for informational purposes only and is not applicable to any Audi Warranty. Owners should discuss potential costs with their service center.

NHTSA ID: 11011259