How do you replace a fuel pump on a 2005 Mazda 6?

To replace the fuel pump on a 2005 Mazda 6, first disconnect the negative battery cable and relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Then, access the fuel pump by removing the rear seat cushion and the inspection cover. Disconnect the fuel lines and electrical connectors, then unscrew the pump assembly and replace it with a new unit. Reassemble everything in reverse order, reconnect the battery, and check for leaks before starting the engine.