The Genuine Audi Radiator Coolant Hose - 4L0121051B is a high-quality replacement part for your Audi vehicle's cooling system. This hose is designed to transport coolant from the radiator to the engine, helping to regulate the engine's temperature and prevent overheating. It is made from durable materials and is an exact fit for your specific Audi model. This hose is an essential component for maintaining the proper functioning of your vehicle's cooling system and ensuring optimal engine performance.