Just picked up a 2013 Mazda 3 grand touring sedan and it only came with 1 key fob or smart key, not sure the correct name. You don't have to use a key to open the doors or start the car. It only came with 1 and want to get a backup, understand the dealer or locksmith has to program it but looking on eBay there are a lot that say it will work with a 2013 Mazda 3 but non of them have the same FCC ID or Model number. The one I have is a 3 button SKE11A-03 and some of the others are a 4 button that say it will work.