Genuine OEM Volkswagen control unit for petrol engines, part number 04C906025B. This electronic control unit (ECU) is the brain of the engine management system, responsible for monitoring various sensors and controlling critical engine functions such as fuel injection, ignition timing, and emissions. It ensures optimal engine performance, fuel efficiency, and compliance with emission standards. Genuine OEM control units come with the correct firmware and calibration for seamless integration and reliable operation.