Genuine OEM Volkswagen Control Unit, part number 04L906016FS. This control unit is essential for managing the diesel engine's operations, including fuel injection timing, emissions control, and overall performance. It is typically located within the engine bay. The unit has dimensions of 0.205m x 0.18m x 0.04m and weighs 0.824 kg. Genuine OEM electronic control units are critical for ensuring the correct firmware, sensor calibration, and signal characteristics required for optimal and reliable engine function.