Genuine OEM Volkswagen Rear Level Sensor, part number 5WA512521. This sensor is responsible for accurately measuring the vehicle's ride height, providing data for various control systems. It is typically installed on the rear left side of the vehicle, connected via a linkage arm to the suspension. The assembly includes a robust electronic sensor unit and durable metal mounting brackets. Choosing a genuine OEM sensor ensures precise calibration and signal characteristics, vital for the correct operation of adaptive suspension and headlight leveling systems.