Rein improved all aluminum electric water pump replacement kits offer a valuable solution to failure prone cooling related components on the N54 BWM engine platforms. At the heart of these kits are improved all aluminum electric water pumps and OE-quality thermostat assemblies which are complemented by Rein's problem solver hoses and necessary mounting hardware. These kits ensure that the time-consuming water pump repair is performed in a single effort, eliminating the possibility of a repeat repair. Replacing all related cooling system components at a suggested interval of 80,000 miles on this complicated engine platform and performing a proper coolant flush at the same time will ensure longevity of the system. The OE or Pentosin NF-G11 coolant is recommended for this repair. These kits are backed by a 4 year / 50,000 mile warranty.