I have a 2006 G35 coupe and i replaced the battery on the lock unlock device and it still doesnt work. Yes i made sure it was the right battery and in the right way. Should i just get a new key and from where?? Dealership??

 

dealership will charge you about 120 and 50 bucks to re program the key aswell.... make sure its not ur car battery. i had a problem like that but it was my car battery once i boosted it everything was good.

 

You may want to try another battery first. It is not unusual to get a new button type of battery that is bad, especially from a low volume dealer.