Connecting the lower 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 BMW owner looking to preventively maintain or restore their cooling system. We've found these Febi hoses to be great quality, which is manufactured by an original equipment supplier and use the Genuine plastic hose connectors.
Rein Part Number: CHR0462