Genuine OEM Audi Engine Control Unit, part number 04E906027AL. This is the primary electronic control module for the petrol engine, responsible for managing fuel injection, ignition timing, emissions control, and other vital engine operations. It is located within the engine bay assembly. This unit weighs 0.623 kg and measures 0.185m x 0.15m x 0.055m. Genuine OEM engine control units are essential for ensuring the correct firmware, precise sensor calibration, and optimal engine performance and longevity.