Genuine BMW upper radiator coolant hose for the F80/F82/F83 M3/M4. Direct-fit factory replacement hose carrying coolant from the engine to the radiator; a cracked or split hose (common as factory rubber hoses age, especially under the S55's higher cooling-system pressures) causes coolant loss and overheating if not replaced.

Fitment: BMW M3/M4, F80/F82/F83 chassis, S55 3.0L twin-turbo engine.