How do you replace rear brake sensor in Audi A3?

To replace the rear brake sensor in an Audi A3, start by safely lifting the vehicle and removing the rear wheel to access the brake components. Disconnect the old brake sensor from the wiring harness, then remove it from the brake pad. Install the new sensor by connecting it to the wiring harness and securing it to the brake pad, then reassemble the wheel and lower the vehicle. Always check the brake system for any issues before driving.