Push on ignition key.
Mazda 3 key fob battery replacement 2010.
Test new fob battery.
Push the metal ignition key piece back in to the fob until it clicks in to place.
Fold the metal ignition key back down in to the fob and double check that the parts are secure.
Insert the new battery.
Pull out the dead key fob battery from the mazda keyless remote.
Released in 2004 the vehicle is currently in its fourth generation.
Remove the key fob battery cover from your mazda remote.
Place the back mazda key fob case aside.
Make sure the positive symbol is facing you.