Genuine OEM Volkswagen Control Unit, part number 04L906016CC. This electronic control module is responsible for managing various functions of the diesel engine. It is typically mounted in the engine bay. The unit has dimensions of 0.205m x 0.18m x 0.04m and weighs 0.824kg. Genuine OEM control units are essential for ensuring the correct firmware and sensor calibration, which is critical for reliable engine operation and emissions compliance.