This hose connects from the lower part of the radiator to the thermostat. Over time, rubber hoses can become hard, with the internal walls covered in sediment and the plastic fittings turning brittle or the internal o-rings simply leaking. A must replace hose for any E46 3-Series owner looking to preventively maintain or restore their cooling system. We've found these Febi hoses to be great quality, which iare manufactured by an original equipment supplier and use genuine plastic hose connectors.

OEM Part Number: 11531436408
Rein Part Number: CHR0002P