Genuine OEM Audi Engine Coolant Hose, part number 8K0121444A. This hose is a vital component of the engine cooling system, designed to carry coolant between various engine components to maintain optimal operating temperatures. It is a flexible hose, weighing approximately 0.206 kg and measuring about 0.455 meters in length. Using a genuine OEM hose ensures the correct routing geometry, material composition, and resistance to temperature and pressure fluctuations for reliable, leak-free performance.