Genuine OEM Audi Timing Chain Tensioner Guide, part number 05A109217A. This essential engine component plays a crucial role in the timing chain assembly, guiding the chain and helping to maintain proper tension. Correct tension is vital for precise valve timing, which directly impacts engine performance and longevity. It is positioned within the engine's timing chain drive system. Constructed from durable metal, this guide weighs approximately 0.104 kg. Choosing a genuine OEM timing chain tensioner guide ensures factory-specified material strength, precise dimensions, and optimal surface finish for smooth chain operation and extended service life.