Genuine OEM Volkswagen Battery Monitoring Control Unit, part number 4K0915181A. This electronic module is crucial for monitoring the vehicle's battery performance, state of charge, and overall health. It integrates directly with the battery terminal to provide accurate data to the vehicle's electrical system, optimizing charging cycles and managing power consumption. Weighing 0.274 kg, this unit is designed for precise integration. Choosing a genuine OEM control unit ensures correct firmware, accurate sensor calibration, and seamless communication with other vehicle systems, preventing electrical faults and maximizing battery lifespan.