Genuine OEM Volkswagen Coolant Circuit Control Unit, part number 03N906249C. This electronic control unit is responsible for managing the flow of engine coolant, optimizing temperature regulation for efficient engine operation and emissions control. It integrates into the engine cooling system, often controlling valves or pumps. Weighing 0.29 kg, this unit measures 0.19m in length. Choosing a genuine OEM control unit ensures correct firmware, sensor calibration, and seamless integration with other vehicle systems for reliable performance.