Genuine OEM Audi Timing Belt Tensioner Roller, part number 06B109243F. 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 installed within the engine's timing belt system. Weighing 0.783 kg, this roller is engineered for smooth operation and long service life. Choosing a genuine OEM tensioner roller guarantees factory-specified tolerances, material quality, and reliable performance, which are crucial for preventing timing belt slippage and potential catastrophic engine failure.