Genuine OEM Volkswagen Control Unit, part number 03C906024BJ. This control unit is essential for managing the petrol engine's operations, including fuel injection, ignition timing, and emissions control. It is typically located within the engine bay. The unit weighs 0.446 kg and measures 0.18m x 0.095m x 0.04m. Genuine OEM control units are critical for ensuring the correct firmware and sensor calibration, which directly impacts engine performance and longevity.