Genuine OEM Volkswagen Control Unit For Diesel Engine, part number 04L906056BF. This is the main engine control module responsible for managing diesel engine operations. It is typically located within the engine bay. This unit has a weight of 0.92 kg and dimensions of 0.205m x 0.185m x 0.04m. Genuine OEM engine control units are critical for precise calibration and ensuring optimal engine performance and emissions compliance.