Genuine OEM Audi Coolant Hose, part number 4F0121447C. This hose is a critical component in the engine's cooling system, responsible for circulating coolant to maintain optimal operating temperatures. It connects to the radiator, facilitating heat exchange. Weighing 0.1395 kg and measuring 0.34 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.