Genuine OEM Volkswagen Control Unit, part number 04L906016DQ. This electronic control module is designed for the diesel engine, managing critical functions such as fuel injection, ignition timing, and emissions control. It is typically located within the engine bay. The unit weighs approximately 0.907 kg. Genuine OEM parts are essential for control units as they guarantee precise calibration, correct firmware, and seamless integration with other vehicle systems for optimal engine performance and longevity.