Genuine OEM Volkswagen Radiator Fan Control Unit, part number 1J0919506L. This electronic module is responsible for precisely regulating the speed and operation of the radiator cooling fan, maintaining optimal engine temperature. It operates on a 12V electrical system and weighs 0.244 kg. Using a genuine OEM control unit ensures correct firmware, sensor calibration, and seamless communication with other vehicle systems, critical for effective engine cooling and preventing overheating.