Genuine OEM Audi Engine Timing Chain, part number 059109229AJ. This critical component synchronizes the rotation of the engine's crankshaft and camshaft, ensuring precise valve timing for optimal combustion. It is located within the engine assembly. Weighing approximately 0.97 kg, this chain is built for durability. Choosing a genuine OEM timing chain guarantees the correct material strength and link design for reliable, long-term engine performance.