Regardless of how many times you press the button or smack the key fob against the palm of your hand, the doors won't unlock. Of course, all hope is not lost because this usually just means the ...

Today’s new cars pack in more high-tech electronic features than ever before, and that includes in the key fob. The device has gone far beyond simply locking or unlocking doors, starting a car ...

If you’re driving a car that uses a physical key and it seems to be stuck in the ignition, the first thing to do is make sure your car’s in park—it won’t come out if you’re still in drive. If that’s ...

Like anything powered by a battery, a car key fob can die—often at the worst time. Here’s how to change the battery in your key fob quickly and safely. Check your battery type. Most fobs use small ...

The original version of this story appeared in Quanta Magazine. For thousands of years, if you wanted to send a secret message, there was basically one way to do it. You’d scramble the message using a ...