Turn off the power to the microwave by unplugging the power cord from the wall outlet.
Open the microwave door. Remove the screws securing the latch on the microwave door, using a Phillips screwdriver.
Pry out the two latches on the door, using a Phillips screwdriver. Set the latches aside.
Insert the new latches into the two slots on the microwave door so that they fit into place.
Reinsert the screws into the latches so that they are securely connected to the door. Close the microwave door and plug the microwave back in.