Genuine OEM Volkswagen Rain Sensor, part number 1K0955559AG. This optical sensor is mounted on the windshield and detects the presence and intensity of precipitation. It automatically controls the windshield wipers, adjusting their speed to maintain clear visibility. Weighing 0.093 kg, this sensor provides precise input for the wiper system. Choosing a genuine OEM rain sensor ensures accurate calibration and reliable operation, critical for automatic wiper functionality and driving safety in varying weather conditions.