Genuine OEM Volkswagen High Pressure Pump, part number 03L130851AX. This pump is a critical component of the fuel system, responsible for increasing fuel pressure to the level required for direct injection into the engine cylinders. It is typically mounted on the engine and driven by the camshaft or a dedicated pump drive. Its precise internal tolerances and robust construction ensure consistent and accurate fuel delivery for optimal engine performance and efficiency. Genuine OEM high pressure pumps are manufactured to exact specifications for reliable operation and longevity.