Genuine OEM Audi Brake Pad Wear Sensor, part number 83A615121A. This sensor is designed to detect the wear level of the brake pads, alerting the driver when replacement is needed. It is installed on the front right wheel assembly. Measuring approximately 34 cm in length, this sensor provides precise monitoring. Opting for a genuine OEM sensor ensures accurate calibration and reliable performance, critical for maintaining the integrity of the braking system.