Purchasing just the fuel pump is less expensive up-front, but a complete Fuel Pump & Housing Assembly provides added benefits. Extend Service Life: New strainer(s), hoses, sensors and other components help resolve problems that could be caused by more than just the pump. Reduce Install Time: Since you don't have to disassemble the housing, which could lead to damage, replacement becomes a simple swap, dramatically reducing installation time. Save Money: The cost of the assembly is often cheaper than buying the components individually, and means you only have to do the job once.