Genuine OEM Audi Right Control Chain Tensioner, part number 06E109218AP. This essential engine component is responsible for maintaining the correct tension on the control chain, which is vital for synchronized engine operation. It is specifically designed for the right side of the engine's timing assembly. Constructed from durable metal with a low-friction guide surface, it weighs approximately 0.311 kg. Genuine OEM chain tensioners provide precise tensioning force and wear resistance, crucial for preventing chain slack and ensuring reliable engine timing.