Replacing a BMW key battery is a simple task that can be completed in a few minutes with the right tools. A new battery will ensure that your key fob continues to function properly, allowing you to lock and unlock your car, open the trunk, and start the engine.
The first step is to identify the type of battery that your key fob uses. This information can be found in your vehicle’s owner’s manual or by searching online. Once you know the type of battery you need, you can purchase a replacement at your local hardware store or online.