Genuine OEM Audi Coolant Hose, part number 7P0121051B. This hose is an essential component of the engine cooling system, responsible for transporting coolant between various components like the radiator, engine, and auxiliary heat exchangers. It is positioned to facilitate the circulation of coolant for effective temperature regulation. Measuring approximately 0.423 meters in length, this hose is made from high-quality, heat-resistant rubber to withstand engine temperatures and pressures. Using a genuine OEM coolant hose ensures a perfect fit, leak-free connections, and long-term durability, crucial for preventing engine overheating.