A woman with an electronic car key fob© F.j. Jimenez/Getty Images A person trying to reprogram a key© Aleksandr Potashev/Getty Images A person reprogramming car keys© Potashev Aleksandr ...

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 ...

The key fob is your lifeline to your car, letting you unlock the doors and set off the alarm, at a minimum, but how can you tell if it needs a new battery?