Genuine OEM Audi Engine Oil Pump Chain Tensioner, part number 06E109507G. This critical component is responsible for maintaining the correct tension on the engine oil pump drive chain, ensuring smooth and efficient operation of the oil pump. It is located within the engine's lubrication system, guiding the chain and preventing slack. Weighing approximately 0.068 kg, this tensioner is typically made from durable, wear-resistant polymer. Using a genuine OEM chain tensioner ensures precise fitment and material quality, which is vital for preventing premature wear and maintaining consistent oil pressure.