Locksmiths or automobile dealerships will use an auto key programmer, whereas a smart key fob programmer can be used for other mechanical key fob fixes and replacements. Regardless of the issue, when dealing with the inner workings of your fob, it’s best to not attempt to gain entry without first reprogramming your current fob or seeking out a replacement key. Since each manufacturer possesses a unique system for programming keys and may require proprietary software to gain access to your fob, be sure you enquire about the program to gain access to the right key programming tool.