Genuine OEM Audi Timing Chain Tensioner, part number 079109218D. This critical engine component is responsible for maintaining the correct tension on the timing chain, which is essential for precise valve timing and smooth engine operation. It is installed within the engine's timing system. Weighing 0.195 kg, this tensioner measures 0.096m in length, 0.048m in width, and 0.06m in height. Opting for a genuine OEM timing chain tensioner ensures it provides the exact hydraulic pressure and durability required to prevent timing chain slack and potential engine damage.