Genuine OEM Volkswagen Injector Unit, part number 03L130277SX. This injector is responsible for precisely delivering fuel into the engine's combustion chamber. It is mounted in the cylinder head and connects to the fuel rail and intake manifold. The precise spray pattern and timing are crucial for efficient combustion and engine performance. Genuine OEM injectors are manufactured to exact specifications, ensuring correct fuel atomization and flow rates for optimal engine operation and longevity.