BMW e39 emissions smog Air Pump HOSE (pump 2 valve) aux circulation pipe line Air Pump Hose Emission Control Pump to Valve Brand NEW part with full 1 year warranty. BMW part# 11 72 1 435 456, check fit below. Genuine BMW part, recently made: not been lying around. Please NOTE the mid-year split on PRODUCTION date. Not sure about your car? email us your VIN to confirm.