Genuine OEM Audi Engine Timing Belt Pulley, part number 04L105263D. This precision-engineered component is essential for the engine's timing system, working in conjunction with the timing belt to synchronize the rotation of the crankshaft and camshafts. It ensures the correct opening and closing of engine valves relative to piston position. Located on the crankshaft, a genuine OEM timing pulley guarantees exact tooth profiles and dimensions for accurate timing and reliable engine operation.