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.

First off, before paying for a new key fob, check your car’s basic warranty, insurance, or roadside assistance coverage to see if they cover lost or damaged keys.

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.

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

Many of the less-advanced fobs can be laser-cut and programmed by your local mechanic or locksmith, but if you’re up for the challenge, programming it yourself can be a fun project.

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.

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.