Genuine OEM Audi Engine Timing Chain Sprocket, part number 05A109570. This critical component drives the timing chain, ensuring precise synchronization of the engine's camshafts and crankshaft. It is located within the engine's timing assembly, facilitating the coordinated movement of valves and pistons. Weighing approximately 0.132 kg and measuring 0.067 m in diameter, this sprocket is manufactured to exact specifications. Choosing genuine OEM ensures the correct tooth profile, material hardness, and dimensional accuracy for reliable, long-term engine timing and performance.