Download Audi TT Boost Control System Installation Instructions – 1. Before starting the installation make sure the vehicle is turned off and the key is removed. 2. Find a suitable location to mount the BCS. In most cases the unit is installed in the opening of the center console near the car stereo. The unit is held in place with the Velcro that is provided. 3. Route the wires through the center console to the driver’s side of the car above the clutch or brake pedal. 4. Remove the windshield wiper blades from the car. 5. Remove the weather stripping found at the back of the engine compartment. Remove the screws on the passenger side of the car from the plastic cover that covers the windshield wiper motor. Remove the plastic windshield cover by lifting up on the passenger side and sliding it towards the back of the car. 6. Once the windshield wiper motor and assembly is exposed remove the three 10 mm bolts that attach the assembly to the car. Unclip and remove the black plastic box located on the driver’s side of the car. 7. Route the wires up to the hole found inside the black plastic box. Once through the black plastic box, pierce the grommet on the side of the box and pull the wire through. 8. Route the wires to the ECU located in the center of the windshield motor compartment. The ECU is tucked under the windshield and will be partially covered with the connectors facing towards the front of the car. 9. Remove the ECU connector covers by cutting off the zip ties and pulling off. 10. Remove about eight inches of the cloth tape around the ECU wiring harness.