In this primer on how to replace a car key fob, Consumer Reports says getting another high-tech key fob can be a pricey proposition.

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.

There’s usually a mechanical key hiding inside the key fob for cars with push-button start systems, so you can still unlock your door if the car battery or your fob battery runs out of juice.

A car expert reveals how one can start their car with a dead key fob, even if their car has keyless ignition.

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.

It's available in many models made by Chevrolet, GMC, Cadillac, and Buick. Here's how to use it, how to extend the engine's run time, and a few points to keep in mind.

A key fob with remote locking/unlocking and push-button start. A key fob with push-button start and keyless entry that owners can leave in their purse or pocket for virtually all functions.