Genuine OEM Audi Coolant Hose, part number 3D0122073AA. This hose is a vital component of the engine cooling system, responsible for circulating coolant between various engine components to regulate operating temperature. It is positioned within the engine bay as part of the complex cooling circuit. Weighing 0.204 kg, this hose is engineered for specific routing and pressure requirements. Choosing genuine OEM ensures the correct material composition for resistance to heat and coolant chemicals, precise internal diameter, and exact molded shape for leak-free and reliable performance.