Genuine OEM Audi Engine Control Chain Sprocket, part number 059109116A. This precision-machined gear is integral to the engine's timing system, driving the control chain to ensure accurate synchronization of engine components. It is located within the engine's timing assembly. Weighing 0.41 kg, it is crafted from hardened steel for extreme durability and wear resistance. Using a genuine OEM timing sprocket ensures accurate engine timing, preventing costly engine damage and maintaining optimal performance.