Genuine OEM Volkswagen Engine Left Timing Chain Tensioner, part number 06M109217L. This vital engine component is designed to maintain the correct tension on the engine's timing chain, which is essential for synchronized operation of the crankshaft and camshafts. It is specifically for the left side of the engine. Proper tension prevents chain slack, reducing wear and ensuring precise valve timing for optimal engine performance and efficiency. Constructed from durable metal, this tensioner weighs approximately 0.143 kg. Opting for a genuine OEM timing chain tensioner guarantees factory-specified tensioning force, material quality, and precise fitment, which are crucial for preventing catastrophic engine damage and ensuring long-term reliability.