Genuine OEM Audi Coolant Hose with Coupling, part number 7M3122101N. This hose is a critical component of the engine cooling system, designed to transport coolant efficiently between various engine components and the radiator. Its specific routing and integrated coupling ensure a secure, leak-free connection within the cooling circuit. Genuine OEM hoses are manufactured to exact material specifications and pressure ratings, preventing premature cracking or swelling and maintaining system integrity.