Genuine OEM Audi Timing Chain Tensioner Guide, part number 079109507G. This critical engine component is responsible for maintaining the correct tension on the engine timing chain, which is essential for precise valve timing and engine operation. It is located within the engine's timing chain assembly. Constructed from durable metal with a low-friction guide surface, it weighs approximately 0.902 kg. Genuine OEM timing chain tensioner guides are manufactured to exact tolerances, ensuring optimal chain engagement and reducing wear for reliable, long-term engine performance.