Genuine OEM Volkswagen Timing Belt Tensioner, part number 038109243N. This critical engine component is responsible for maintaining the correct tension on the timing belt, ensuring precise synchronization of the engine's camshaft and crankshaft. Proper tension is vital for accurate valve timing and preventing catastrophic engine damage. Weighing 0.466 kg, this tensioner is built to withstand the dynamic forces within the engine. Using a genuine OEM timing belt tensioner guarantees the correct spring tension, bearing quality, and precise dimensions, which are essential for reliable engine performance and extended service life.