Genuine OEM Volkswagen Timing Chain, part number 03D109158C. This timing chain is critical for maintaining the correct synchronization between the engine's crankshaft and camshafts, ensuring proper valve timing and engine operation. It is located within the engine's timing system. The chain is constructed from durable metal links designed for long-term wear resistance. Genuine OEM timing chains are manufactured to precise tolerances to prevent stretching and ensure reliable performance throughout their service life.