Genuine OEM Audi Camshaft Pulley, part number 038109111A. This metal toothed pulley is a critical component in the engine's timing system, responsible for driving the camshaft and ensuring precise valve operation. Weighing 0.64 kg, it is engineered for durability and accurate rotational control. Using a genuine OEM camshaft pulley guarantees exact tooth profiles, material strength, and dimensional accuracy, which are essential for maintaining correct engine timing and preventing catastrophic engine damage.