Genuine OEM Volkswagen Control Unit, part number 03L906023SG. This is the main control unit for the diesel engine, responsible for managing various engine functions. It is a critical electronic component that dictates engine performance and emissions. The unit measures 0.18m in length, 0.2m in width, and 0.04m in height, weighing 0.419kg. Genuine OEM engine control units are essential for ensuring the correct firmware, sensor calibration, and overall engine management system integrity.