Genuine OEM Audi Engine Timing Chain Tensioner, part number 059109467AF. This critical component is designed to maintain proper tension on the engine timing chain, ensuring precise valve timing and smooth engine operation. It is located within the engine's timing system. Weighing approximately 0.038 kg and measuring 0.14 meters in length, it is constructed from durable composite materials with metal inserts. Using a genuine OEM timing chain tensioner guarantees the correct material hardness, dimensional accuracy, and spring tension for reliable and long-lasting engine timing, preventing costly engine damage.