Genuine OEM Audi Engine Control Unit, part number 03L906018LQ. This control unit is essential for managing diesel engine operations, including fuel injection, ignition timing, and emissions control. It is typically located within the engine bay. The unit measures approximately 0.185m in length, 0.17m in width, and 0.04m in height, with a weight of 0.721 kg. Genuine OEM status ensures correct firmware, sensor calibration, and integration with other vehicle systems for reliable engine management.