For instance, if you see someone trying to steal your car, you can press the panic button on the key fob, which will activate your car's alarm system.

If you're looking to pick up a new key fob, or repair one, you might wonder how long programming it takes and whether or not you can do it yourself.

Thieves amplify a vehicle's radio signal to access and copy the key fob signal to steal a vehicle. Here's how to block the signal.