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Change Jeep Wrangler Key Fob Battery: Step-By-Step Guide

Change Jeep Wrangler Key Fob Battery: Step-By-Step Guide

Has your key fob battery gone out? Fortunately, this problem comes with a simple fix. In the article below, you’ll find an easy step-by-step guide on how to replace the key fob battery for your Jeep Wrangler.

All you need to complete this task is a small flathead screwdriver. This will help you pry open the fob using the designed indent without damaging the outer casing. You should be able to access the battery and replace it without needing any other tools.

In the sections below, you’ll learn how to find a replacement battery. All of your questions are covered, including what to do if you get your key fob wet.

Can I change my Jeep wrangler key fob battery myself?

Yes, you can easily change a Jeep Wrangler key fob battery by yourself. There’s no need to go to the dealership or anywhere else for that matter. Although your key fob may be covered under a bumper-to-bumper warranty if recently purchased.

All you need for tools is a small flathead screwdriver. You’ll also need a replacement 3-Volt battery. Continue below to learn more about how to find a replacement battery and install it.

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What kind of battery does my Jeep Wrangler key fob take?

Please be advised that the specific battery depends on the model year. However, it’ll always be one of those tiny round 3-volt lithium batteries.

You can buy replacement batteries quite easily online. For example, here’s a CR2032 Lithium Ion Battery from Amazon.

As you’ll find out below, it’s simple to access the battery. So your first step should always be to quickly open the fob up and double-check that you are purchasing the correct replacement battery.

Here’s a quick video showing how to replace the Wrangler key fob battery, with written steps below:

How Do I Change The Battery in my Jeep Wrangler Key Fob?

Here’s how to replace the battery in your Jeep Wrangler’s key fob.

Step 1: How To Open Your Car’s Key Fob

If you look ain’t the side of your key fob, you’ll notice a line where the upper and lower (thicker) parts of the plastic fob meet.

  • Continue to look over this line of separation until you find a tiny slot or indent. In many models, this is at the opposite end of the blade.
  • This is where a small flathead screwdriver comes in handy. Take the screwdriver and gently push it upwards to open the key fob.

Step 2: Where To Find The Battery

The battery is small and circular, about the size of and shape of a coin. It should be in the bottom piece of the fob once you open it up.

The battery should pop out easily without any poking or prodding. But if you have trouble, you may once again enlist the help of your flathead screwdriver. It may help to have an even smaller screwdriver.

Step 3: Replacing The Battery & Putting Things Back Together

Once you’ve installed the new battery, it should be simple to snap the two parts of the fob back into place.

Do You Need To Reprogram A Key Fob After Replacing The Battery?

There should be no need to reprogram the key fob if all you’ve done is replace the battery. If you are still having trouble, then you may need a replacement key fob.

There’s also the potential that you may have inadvertently pressed or bumped one of the interior components of the fob. At least the most recent models of key fobs tend to separate the battery from the rest of the fob with a set of screws.

But in the older key fobs, the circuit board for the button controls and the battery itself are more tightly-packed together. One potential solution would be to carefully take apart a spare key (without disturbing the battery)  to double-check how everything fits together.

Alternatively, you might take your key into a Jeep dealership and ask for help.

How Do I Know That I Need To Replace My Key Fob Battery?

Before the battery completely dies out, you should notice a prolonged period of reduced response. Maybe you have to stand closer to your vehicle to unlock it. Or perhaps you find yourself pushing the button harder to get a response.

In newer models, you may be equipped with a key fob that allows for remote start. In some cases of poor response when you push a button, the battery may not be the problem. Cell phones and other electronic devices can interfere (source: owners manual) with the key’s wireless signal.

Put away your cell phone for a quick second and then try using the key fob. If you are still having trouble, then there’s a good chance that the battery will need to be replaced.

How long do Key Fob Batteries last?

It all comes down to the frequency of usage. However, you can typically expect the batteries in a Jeep Wrangler key fob to last anywhere between 3-5 years.

The good thing is that most key fobs use the same batteries. So if you stock up on replacement batteries now, you shouldn’t have too much trouble putting them to use in the future.

Are Key Fobs Waterproof? How To Fix A Wet Key Fob

Key fobs are not waterproof. If your keys have become submerged, you must dry things out as soon as possible. There could end up being a shortage in the circuit board. The battery may also drop its charge.

To dry out a key fob, do this:

  • Take the key fob apart, including removing the battery.
  • Leave the key in a warm and dry room.
  • Avoid trying to heat the fob or run a hair over it. Excess heat or air pressure may damage the parts.
  • You may place the fob near a vent, where there is gentle air pressure.

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Final Thoughts

You can replace your key fob’s battery with a flathead screwdriver. A key fob will take a small, coin-shaped 3V lithium battery, which can be ordered online. Once you have replaced the battery, you shouldn’t have to do anything else.

If you are still having trouble getting the key fob to work, you are encouraged to scan through the troubleshooting tips in the above sections.

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