How do you change the main 120 amp fuse in a 2006 Mazda 6?

To change the main 120 amp fuse in a 2006 Mazda 6, first ensure the vehicle is turned off and disconnect the negative battery terminal to prevent any electrical shock. Locate the fuse box, which is typically found in the engine compartment. Carefully remove the fuse using a fuse puller or pliers, then insert the new 120 amp fuse in its place. Finally, reconnect the negative battery terminal and check that all electrical systems are functioning properly.