Genuine OEM Volkswagen Control Unit, part number 03C906016CD. This electronic control module is responsible for managing various engine functions, including fuel injection and ignition timing. It is typically located in the engine bay. The unit has dimensions of 0.205m x 0.18m x 0.04m and weighs 0.882 kg. Genuine OEM electronic control units are critical for ensuring correct firmware, sensor calibration, and signal characteristics, which are essential for reliable engine operation and emissions compliance.