WARNING: This page is about a different car, the 2003 Audi allroad, 2003 Audi TT, 2003 Audi S6, 2003 Audi A6, and 2003 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Vehicles equipped with body, air conditioning, anti-lock brake or memory computers may require a computer relearn procedure after components are replaced or the vehicle battery is disconnected. Vehicle computers memorize and store vehicle information and operation selections. When the vehicle battery is disconnected, vehicle computer memory may be lost, requiring relearning or resetting. Depending on the vehicle and how it is equipped, the following memories may exist:

Seat position.
Tilt/telescoping steering wheel position.
Mirror position.
Radio presets and anti-theft code.
Clock.
Remote keyless entry custom features.
Door key lock entry custom features.
Power window or sunroof operation.

These systems do not affect vehicle operation. To reset miscellaneous body systems after battery is disconnected, see appropriate procedure under MISCELLANEOUS BODY SYSTEM RESET PROCEDURES .

Other computer relearn procedures that maybe required for vehicle or system operation may include:

Initial control unit programming.
Traction control yaw sensor initializing (Electronic Steering).
Multiplex communication.
Anti-theft system or engine immobilizer system passwords.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Body Controls

Use the Manual With the Right Hardware

When to See a Mechanic