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.

The key fob hack, dubbed “Rolling Pwn” by a pair of security researchers, involves a potential vulnerability in the keyless entry system of certain 2012-2022 Honda vehicles.

Learning how to change the battery in a Toyota key fob isn't difficult. Whether you have a new or old model, we'll show you how to do it step by step.