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 ...

If your key fob isn't working, it probably needs a new battery.

If the battery in your car key fob has died, here's how to replace it – including the type of battery you'll need and the cost involved.

There’s usually a mechanical key hiding inside the key fob for cars with push-button start systems, so you can still unlock your door if the car battery or your fob battery runs out of juice.