How do you change a fuel filter on a 91 Mazda 626?

To change the fuel filter on a 1991 Mazda 626, first, ensure the engine is off and relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls. Next, locate the fuel filter, typically mounted along the frame rail or near the fuel tank, and use a wrench to disconnect the inlet and outlet fuel lines, taking care to catch any spilled fuel. Replace the old filter with a new one, ensuring the flow direction matches the markings on the filter, and reattach the fuel lines securely. Finally, replace the fuel pump fuse and start the engine to check for leaks.