How do you change 2004 Mazda 6 fuel filter?

To change the fuel filter on a 2004 Mazda 6, first relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Then, disconnect the negative battery terminal and locate the fuel filter, which is typically found along the fuel line. Use a wrench to loosen the fittings and carefully remove the old filter, ensuring you have a container to catch any spilled fuel. Install the new filter in the same orientation, reconnect the fuel line fittings, reinstall the fuse, and reconnect the battery.