Genuine OEM Volkswagen Control Unit for Diesel Engine, part number 03L906023MD. This electronic control module manages critical engine functions, processing sensor data to optimize fuel injection, ignition timing, and emissions control. It is typically located within the engine bay, often in a protective housing. The unit measures approximately 0.18m x 0.2m x 0.04m and weighs 1.1 kg. As a genuine OEM part, it guarantees factory-specified calibration and signal characteristics, ensuring reliable engine operation and longevity.