Genuine OEM Audi Engine Timing Chain, part number 06M109229AA. This precision-engineered chain is vital for synchronizing the rotational movements of the engine's crankshaft and camshafts. It ensures that the engine valves open and close at the precise moment relative to piston position, specifically for the left side of the engine. Made from high-strength steel, it weighs approximately 0.34 kg and measures 0.115m in length, 0.115m in width, and 0.01m in height. An authentic OEM timing chain guarantees exact pitch and material specifications, crucial for maintaining precise valve timing, preventing catastrophic engine damage, and ensuring long-term reliability.