How Does Your Key Fob Work? The key fob uses wireless technology with a frequency of 433 MHz. There are receivers/transmitters on the vehicle and the key, so they can communicate with each other. This ...

Modern cars have swapped regular keys for key fobs, and most of them use a CR2032 button cell battery. How can you tell if it's weak? How long do they last?

A key fob is a small device that helps you engage the security system on a car to gain access and, sometimes, start the car remotely. They come attached with an RFID chip & an antenna inside and use ...

What is a key fob, anyway? A key fob is a small remote device that allows you to control a keyless system. With a key fob, you don’t need an actual key to get into your car. The key fob uses radio ...

Your key fob's panic button is easy to ignore until it goes off by mistake, but it serves a real purpose beyond the usual ...

Locked out? Discover how to find your car's physical emergency key, bypass the push-to-start ignition, and get back on the road when your key fob battery dies.

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Gizmodo may earn an affiliate commission. Reading time 5 minutes ...

Most drivers discover their key fob battery is failing at the worst possible moment: standing in a parking lot, pressing the unlock button repeatedly with no response. But modern vehicles are designed ...