While some hardware stores may be able to program a modern car key, it’s something most folks end up at their car dealer for—or a locksmith, if you’ve lost a key altogether.

Electronic keys introduce new components that can be expensive, even without paying a dealer to program them. If you can do the job yourself, you can save both time and money by not having to visit ...

In this primer on how to replace a car key fob, Consumer Reports says getting another high-tech key fob can be a pricey proposition.