Pull out the dead key fob battery from the mazda keyless remote.
Mazda 3 key fob battery replacement 2010.
Make sure the positive symbol is facing you.
Test new fob battery.
Simple step by step video on how to replace the battery in a key fob remote.
Stand near your mazda3 and press the lock or unlock buttons to test the new key fob battery.
Save money doing it yourself.
Push on ignition key.
Place the back mazda key fob case aside.
Remove the key fob battery cover from your mazda remote.
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.
Fold the metal ignition key back down in to the fob and double check that the parts are secure.
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