Genuine OEM VAG Control Unit For Diesel Engine, part number 04L906056HJ. This electronic control module is responsible for managing various functions of the diesel engine. It is typically located within the engine bay. The unit weighs approximately 0.75 kg and has dimensions of 0.185m x 0.182m x 0.04m. Genuine OEM electronic control modules are crucial for ensuring correct firmware, sensor calibration, and overall engine performance.