Genuine OEM Volkswagen Ultrasound Sensor Retainer, part number 3C8919493E. This component is designed to securely hold an ultrasound sensor, which is a key part of the vehicle's parking assistance or proximity detection system. It is positioned in the front left section of the vehicle's bodywork. The retainer features a white face, likely to blend with the exterior finish. Using a genuine OEM retainer ensures the sensor is held at the exact factory-specified angle and depth, which is critical for accurate sensor readings and the proper functioning of safety and convenience systems.