Genuine OEM Audi Engine Coolant Hose, part number 1EA121057P. 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 curved hose, connecting to a component near the top left of the engine assembly. Weighing 0.07 kg and measuring 0.195 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.