Genuine OEM Audi Coolant Hose, part number 4H0121082P. This hose is designed to transport coolant efficiently throughout the engine cooling system, playing a critical role in regulating engine temperature. It is positioned near the coolant expansion tank, facilitating proper fluid circulation. Weighing 0.222 kg and measuring 0.375 meters in length, it is engineered for specific routing. Choosing a genuine OEM coolant hose ensures the correct material composition, pressure resistance, and exact routing geometry for a leak-free and reliable cooling system.