New key fobs must be programmed with codes that the vehicle has to read before it unlocks the door or allows starting the engine.

To better understand the steps needed to replace a key fob—and the costs—we set out to buy and program several of them. Along the way we learned several valuable lessons that can help you save ...

Electronic keys introduce new components that can be expensive, even without paying a dealer to program them. If you can do the job yourself, you can save both time and money by not having to visit ...

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.

Just know that most customer-programmable key fobs will require two current working keys in order to program the new one. RELATED: How to replace your key fob | Your key fob may have hidden features ...

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.

But maybe you’ve experienced the downside: The cost to replace the latest key fobs can be as much as $400 depending on the brand. Then add another $20 to $130 to program it to work with your car.

Like anything else relying on a battery, you car key fob can die—often at the worst time. Thankfully, these batteries are easy to replace.

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.