Genuine OEM Audi Coolant Hose, part number 8W0122101BH. This hose is crucial for circulating coolant throughout the engine's cooling system, maintaining optimal operating temperatures. It connects various cooling components, including the expansion tank. Weighing 0.389 kg and measuring 0.525 m in length, this hose is manufactured to exact factory specifications. Using a genuine OEM coolant hose ensures precise fitment, proper fluid flow, and long-term durability, preventing leaks and system failures.