How to replace your vehicle’s key fob battery

By Product Expert | Posted in Honda How-To on Friday, May 18th, 2018 at 2:05 pm
man offering key on open palm

That moment of panic when your car doesn’t unlock can ruin anyone’s day, especially if you are in a hurry. Knowing how to replace your car’s key fob battery can save a whole lot of irritation. So, here’s how to replace the battery in both a ‘normal’ vehicle as well as the key fob that has a keyless entry.

Changing the battery in your key fob

Replacing the battery in the normal key fob is relatively painless, all you’ll need is a #1 Philips screwdriver, or a jeweler’s screwdriver, a small flathead screwdriver, and a replacement battery.

car key next to small toy carNow that you have all the tools needed, go ahead and locate the screw on your key fob. Unscrew it with the jeweler’s screwdriver, and gently pry the two pieces open with the flathead. The battery should be exposed. Before you remove the battery, make sure you know what position it is in; meaning, where is the negative side facing, versus the positive. If you forget to do so, don’t panic too much. There should be a marking of positive and negative symbols on the inside of your key fob.

Carefully remove the dead battery and replace it with the new one. Then, snap the two pieces of the exterior of your key fob together, and screw it back together.

To replace the keyless key fob battery, you use the same process. The only difference is that you may not have a screw on your key fob. If this is the case, you won’t need the jeweler’s screwdriver. Instead, you’ll go straight to gently prying the two exterior pieces apart using the small flathead screwdriver.

Read More: How to reset the Engine Oil Life setting in the 2018 Honda CR-V

How do I know what battery to use for my key fob?

Knowing what battery your key fob needs is pretty easy. It should be written on the back of the key. If it isn’t, you’ll be able to tell once you open the key and can take a look at the dead battery.

Need help with your vehicle? No problem! We have a great car service here at Matt Castrucci Honda. All you need to do is give us a call to set up an appointment.

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