Genuine OEM Volkswagen Engine Roller Rocker Arm, part number 036109411D. This arm transmits motion from the camshaft to the valves, ensuring precise engine timing and valve operation. It is located within the cylinder head assembly. Weighing 0.053 kg and measuring 0.048m in length, this component is manufactured to exact factory specifications. Using a genuine OEM rocker arm ensures correct valve lift, duration, and overall engine performance, preventing premature wear and maintaining optimal engine efficiency.