Genuine OEM Audi Engine Coolant Hose, part number 4M0121444D. This hose is crucial for transporting coolant throughout the engine cooling system to regulate engine temperature. It is a short, curved hose connecting components within the cooling circuit. Weighing 0.036 kg, it measures 0.11 m in length. Choosing a genuine OEM hose ensures correct routing geometry, material resistance to heat and pressure, and a leak-free connection for optimal cooling system performance.