Genuine OEM Audi Engine Timing Chain, part number 059109106E. This vital component is responsible for synchronizing the rotation of the engine's crankshaft and camshaft, ensuring precise valve timing and efficient combustion. Located within the engine, it is a key part of the valvetrain system. Using a genuine OEM timing chain ensures factory-specified material strength and link design, crucial for long-term engine reliability and preventing catastrophic engine damage.