Immobilizer, servicing

WARNING: This page is about a different car, the 2002 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Before beginning repairs on the electrical system:

Obtain the anti-theft radio security code.
Switch the ignition off.
Disconnect the battery Ground (GND) strap.
After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Information and/or Owner's Manual.

NOTE:

Steps after reconnecting voltage supply. Refer to Battery, disconnecting and connecting .
The control module for immobilizer is integrated into the instrument cluster, i.e. the control module for immobilizer is replaced together with the instrument cluster. Refer to Instrument cluster, removing and installing .