Genuine OEM Audi Engine Coolant Hose, part number 4K2819371F. This hose is a critical component in the engine cooling system, designed to circulate coolant and regulate engine temperature. It is a small, curved hose within the complex cooling assembly. Weighing 0.053 kg and measuring 0.14m in length, this hose is engineered to precise factory specifications. Using a genuine OEM hose ensures correct routing geometry and resistance to extreme temperatures and pressures, preventing leaks and maintaining cooling system integrity.