Where Is the TCU Located in an Audi A8?


1. Shift the Audi's transmission into park and turn off the engine. Engage the parking brake and open the driver's side door.
2. Shine a work light above the pedal area, underneath the dashboard.
3. Locate the TCU. It is mounted on a steel carrier, just under the dashboard. Four steel bolts hold the TCU to its carrier. It is made from black plastic, approximately 4-inches wide, and 4-inches long.