The Genuine BMW Engine Coolant Bypass Hose (part number 17128654824) is a high-quality replacement part for BMW vehicles. This hose is responsible for directing coolant flow from the engine to the radiator and back, helping to regulate the engine's temperature and prevent overheating. It is made from durable materials and designed to fit perfectly in your BMW's engine system. This Genuine BMW product is a reliable and essential component for maintaining the proper functioning of your vehicle's cooling system.