Genuine OEM Jaguar Engine Idler Pulley, part number C2Z29183. This pulley guides and supports the engine's internal drive belt, ensuring proper belt routing and smooth rotation within the timing or accessory drive system. It is located within the engine assembly, often near the crankshaft or balance shafts. Weighing 0.224 kg, this precision-machined metal pulley is designed for exact fitment and factory tolerance, crucial for maintaining engine timing and preventing premature belt wear.