How To Change Battery In Mazda Cx3 Key Fob. Pry the battery out using a small flat head screwdriver. You need to gentle when separating the two halves of the key.
Take your pry tool and carefully insert it into the gap between the upper cover and body of your key fob. Replacing the CR2025 battery in your Mazda key fob is a cinch. Use a small screwdriver to open the part of the keyfob that has the lockunlock buttons.
Place the new or spare key into the slot.
Insert the manual key back into the fob and test to make sure it is working. Now you can take the ground off the transmitter wire and try out the remote. Replacing the CR2025 battery in your Mazda key fob is a cinch. Same as the remote you can purchase at your local Mazda dealership.
