Genuine OEM Volkswagen Timing Belt Tensioner Pulley, part number 04L109243H. This essential component is responsible for maintaining the correct tension on the engine's timing belt, ensuring precise synchronization of the crankshaft and camshafts. It is situated within the timing belt assembly, guiding the belt and absorbing vibrations. Weighing 0.619 kg, this pulley is engineered to withstand high rotational speeds and engine temperatures. Opting for a genuine OEM tensioner pulley guarantees factory-specified tolerances, material quality, and spring tension, which are crucial for preventing timing belt slippage or premature wear, thereby protecting the engine from severe damage.