This hose connects from the bottom 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 X5 owner looking to preventive maintain or restore their cooling system. We've found these Rein hoses to be great quality, which are manufactured by an original equipment supplier.

OEM Part Number: 11537508688
Rein Part Number: CHR0021P