Genuine OEM Audi Right Upper Timing Chain Tensioner, part number 079109218AA. This critical component maintains proper tension on the engine's timing chain, ensuring precise valve timing and preventing chain slack or jumping. It is positioned on the upper right side of the timing chain assembly. Constructed from durable metal with a low-friction guide, it weighs approximately 0.473 kg. Choosing a genuine OEM timing chain tensioner ensures factory-specified tension, material quality, and precise fitment for long-term engine reliability and performance.