Make sure the positive symbol is facing you.
Mazda 3 key fob battery replacement 2010.
Stand near your mazda3 and press the lock or unlock buttons to test the new key fob battery.
Test new fob battery.
Cr2025 battery lithium button coin cell batteries 3v 3 volt remote watch jewelry led key fob replacement 2025 cr pack set bulk 2 pack 4 4 out of 5 stars 485 6 47 6.
Push on ignition key.
Fold the metal ignition key back down in to the fob and double check that the parts are secure.
The positive is on top while the negative side of the button cell battery is facing the key fob.
Push the metal ignition key piece back in to the fob until it clicks in to place.
Place the back mazda key fob case aside.
Pull out the dead key fob battery from the mazda keyless remote.
Save money doing it yourself.
Remove the key fob battery cover from your mazda remote.
Insert the new battery.