Genuine OEM Volkswagen Control Unit, part number 03L906012FQ2HA. This is the main control unit for the diesel engine, responsible for managing fuel injection, emissions, and other critical engine functions. It is typically mounted in the engine bay. The unit weighs approximately 0.88 kg and has dimensions of 0.205m x 0.18m x 0.04m. Genuine OEM control units are essential for precise engine management, ensuring optimal performance, fuel efficiency, and emissions compliance.