Genuine OEM Audi Idler Pulley with Bolt, part number 06M260938H. This component plays a vital role in the engine's accessory drive system, guiding and maintaining proper tension on various engine belts. It is typically mounted on the engine block or an accessory bracket, directing the path of the serpentine belt. The pulley measures approximately 60mm in diameter and includes the necessary mounting bolt. Opting for a genuine OEM idler pulley ensures precise bearing tolerances and material quality, crucial for quiet operation and long-term reliability of the belt drive system.