When the battery is removed from the key fob, the fob can lose its ‘memory’ or programming. If the key fob is not working after replacing its battery, a reprogramming procedure may be required.

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.

How To A Program GM Key Fob A key fob, also called a keyless entry remote or keyless transmitter, controls your vehicle’s locks, trunk and alarm from a distance. Every key fob must be programmed to ...

Others allow only dealers to han-dle reprogramming. Depending on the brand of car, the cost to reprogram a key could range from a couple of hundred dollars to over a thousand dollars.

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.