Like anything powered by a battery, a car key fob can die—often at the worst time. Here’s how to change the battery in your key fob quickly and safely. Check your battery type. Most fobs use small ...

Q: After losing one of the two key fobs for my 2008 Nissan Altima, I purchased a new fob from a hardware store and they programmed it. After seven months, the car stopped recognizing the key, and the ...