BMW Genuine Water Pump Pulley (112 mm Diameter) for 840Ci 740i 740iL 740iLP 540i 540iP ALPINA V8 X5 4.4i X5 4.6is BMW Genuine Water Pump Pulley (112 mm Diameter) BMW Manufacturer Warranty: 12000 miles or 1 year Please see Product Description below for vehicle compatibility.