Genuine OEM Volkswagen Toothed Belt Pulley, part number 0XW105263. This pulley is responsible for driving the timing belt, which is essential for maintaining precise synchronization between the camshaft and crankshaft. Accurate timing is critical for optimal engine performance and efficiency. This part is located within the engine's timing system. Genuine OEM pulleys are manufactured with exact tolerances to ensure proper belt tension and longevity.