How to Change a Battery in an Auto Car Key

Change the battery in your remote entry car key.

Many cars and trucks today come standard with keyless entry remote systems. With keyless entry, a remote fob uses a transmitter to open and lock doors, set your car alarm and sound a panic alarm. Eventually the battery in your key remote will wear out and you'll need to change it.

Things You'll Need

• Small coin
• Screwdriver
• New battery

Instructions

1. Look at your key fob. Some have a battery cover with a notch. Others have a notch on the side. And some have small screws holding the fob together.

2. Open the fob to access the battery. For fobs with notches, use a small coin to either turn the battery cover or pry the two pieces apart. For fobs with screws, remove the screws and open the fob.

3. Remove the old battery. Be careful not to touch any of the electrical components.

4. Insert the new battery. For most fobs, you insert the battery with the positive sign side up. Check with your owner's manual for the correct way to insert the battery.

5. Reassemble the key fob.

Tips & Warnings

• Check your owner's manual for the battery type you need.

References

• Edmunds.com: How to Find your Car Owner's Manual Online