Genuine OEM Volkswagen Engine Roller Rocker Arm, part number 07K109417E. This precision-engineered component transfers the rotational motion of the camshaft lobe into linear motion for the engine valves, ensuring accurate valve opening and closing. It is located within the cylinder head, part of the valve train assembly. Made from hardened steel with a low-friction roller, it is designed for high wear resistance and smooth operation. Selecting a genuine OEM rocker arm guarantees factory-specified tolerances and material strength, crucial for maintaining valve train integrity and engine efficiency.