Genuine OEM Volkswagen Injection Pump, part number 028130107R. This pump is the core component of the diesel fuel system, precisely metering and delivering fuel under high pressure to the engine's injectors. It is typically mounted to the engine block and driven by the timing belt or chain. The precise internal calibration and robust construction of a genuine OEM injection pump are essential for optimal engine performance, fuel efficiency, and emissions control. Its exact specifications ensure correct fuel delivery timing and volume.