Genuine OEM Audi Coolant Hose With Coupling, part number 1EA121053D. This hose is designed to connect various cooling system components, facilitating the crucial flow of coolant to maintain optimal engine operating temperatures. It is positioned within the engine cooling system, routing coolant between key parts. Manufactured from durable, heat-resistant rubber compounds, this hose measures approximately 0.23m in length. Choosing a genuine OEM coolant hose ensures precise fitment, correct routing geometry, and resistance to thermal cycling and pressure, preventing leaks and premature failure.