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 ...

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.

You’ll find all the instructions in the owner’s manual. Just know that most customer-programmable key fobs will require two current working keys in order to program the new one.

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.

How to Replace Your Car's Key Fob Consumer Reports looks at what you should know before heading out to find an expensive new key fob.

Consumer Reports recommends the dealer for autos under 5 years old. But after that, you can get a mechanic, locksmith or online fob replacement.

You’ll find all the instructions in the owner’s manual. Just know that most customer-programmable key fobs will require two current working keys in order to program the new one.