Genuine OEM Audi Engine Coolant Hose, part number 4K0121448N. This hose is crucial for transporting coolant throughout the engine cooling system, effectively regulating engine temperature. It connects to a heat exchanger, ensuring efficient heat dissipation. Made from durable rubber, this hose measures approximately 0.14 meters in length. Choosing a genuine OEM hose ensures correct routing geometry, material resistance to coolant, and a leak-free connection for reliable engine cooling.