Genuine OEM Audi Engine Control Unit, part number 05E906018CGGBS. This unit is the central computer for the engine, responsible for managing fuel injection, ignition timing, and other critical functions to ensure optimal performance and emissions. It is typically located within the engine bay. This unit weighs 0.745 kg and measures 0.185m x 0.17m x 0.038m. Genuine OEM ECU units are essential for ensuring the correct firmware and sensor calibration, which is critical for engine reliability and performance.