BMW Genuine Water Pump with Gasket and Heater Return Pipe O-Ring X5 4.4i X5 4.8is 545i 645Ci 645Ci 745i ALPINA B7 745Li BMW Genuine Water Pump with Gasket and Heater Return Pipe O-Ring This part is used in Waterpump - Thermostat -- Manufacturer Warranty: 24000 miles or 2 years Please see Product Description below for vehicle compatibility