Genuine OEM Audi Engine Coolant Hose, part number 1EA121054D. This hose is an essential part of the engine cooling system, responsible for carrying coolant between various engine components to regulate temperature effectively. It is a short, curved hose, connecting to a component on the right side of the engine assembly. Weighing 0.1354 kg and measuring 0.2 meters in length, it is designed for a specific routing. Using a genuine OEM coolant hose guarantees the correct material, diameter, and bend radius for a leak-free connection and long-term resistance to heat, pressure, and coolant chemicals.