Genuine OEM Volkswagen Control Unit for Diesel Engine, part number 04L906016D. This electronic control module is responsible for managing various engine parameters and functions. It is typically located within the engine bay. The unit has dimensions of 0.208m x 0.183m x 0.04m and weighs 0.907kg. Genuine OEM electronic control units are critical for ensuring correct firmware, sensor calibration, and overall system compatibility for reliable engine operation.