Genuine OEM Audi Timing Belt Idler Pulley, part number 077109244C. This component is crucial for guiding and supporting the timing belt, maintaining its correct path and tension within the engine's timing system. Weighing approximately 0.096 kg, this pulley measures 45mm in length and 29mm in diameter. Choosing a genuine OEM idler pulley ensures precise dimensions, proper bearing quality, and reliable, vibration-free operation essential for the longevity of your engine's timing system.