Genuine OEM Volkswagen Idler Pulley, part number 6RF145276. This pulley guides or tensions a belt in a drive system, often used in conjunction with other pulleys. It is a component within the engine's accessory drive system. The pulley has a diameter of approximately 75mm and a height of 95mm. Genuine OEM idler pulleys are manufactured to precise tolerances to ensure smooth operation and longevity, preventing premature belt wear.