Genuine OEM Volkswagen Onboard Supply Control Unit, part number 5WA937087Q. This sophisticated electronic module is responsible for managing and distributing the vehicle's electrical power supply to various systems and components. Weighing approximately 0.39 kg, it ensures stable voltage and current delivery. Using a genuine OEM control unit guarantees correct firmware, precise calibration, and seamless communication with other vehicle modules, which is crucial for the reliable operation of all electrical systems.