BMW z3 (98-02) Radiator Hose Upper to Thermostat Housing engine coolant water Radiator Hose Upper Radiator to Thermostat Housing Brand NEW part with full 1 year warranty. BMW part# 11 53 1 716 641, note the mid-year splits. Recently made by CONTITECH (OEM), not been lying around. Please NOTE the mid-year split on PRODUCTION date. Not sure about your car? email us your VIN to confirm.