Genuine OEM Audi Headlight Level Sensor, part number 1EA412521C. This sensor is crucial for the automatic headlight leveling system, detecting changes in vehicle height to adjust the headlight aim accordingly. It is positioned on the front left side of the suspension assembly. Weighing 0.316 kg, this sensor provides precise input for the lighting system. Using a genuine OEM sensor ensures accurate calibration and signal characteristics, which are vital for correct headlight operation and road safety.