Genuine OEM Volkswagen Control Unit, part number 04L906016MF. This engine control module is essential for managing diesel engine operations, including fuel injection, ignition timing, and emissions control. It is typically located within the engine bay. The unit weighs 0.824 kg and measures 0.205m x 0.18m x 0.04m. Genuine OEM control units are critical for ensuring correct firmware, sensor calibration, and signal characteristics, which directly impacts engine performance and longevity.