How to Replace a Hyundai Elantra Key Fob Battery

The moment we're all familiar with - your Hyundai Elantra key fob starts to become less responsive, or perhaps it stops working altogether.
Hyundai Elantra Key Fob Battery

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The moment we’re all familiar with – your Hyundai Elantra key fob starts to become less responsive, or perhaps it stops working altogether. Does this sound like your current predicament? Well, fret not! More often than not, this issue boils down to a simple battery replacement. Read on to find a step-by-step guide on how to replace a Hyundai Elantra key fob battery.

Understanding the Importance of Your Hyundai Elantra Key Fob

How Does a Hyundai Elantra Key Fob Work?

Your Hyundai Elantra key fob is a small yet powerful device. It uses radio waves to communicate with your vehicle, allowing you to unlock the doors, open the trunk, and even start the engine remotely. Have you ever wondered what powers this convenience? It’s a small battery inside the fob.

Signs Your Hyundai Elantra Key Fob Battery Needs Replacement

Just like any other battery-powered device, your key fob battery will also wear out over time. The most common signs include a less responsive or non-responsive key fob, having to press buttons multiple times for them to work, or the vehicle’s dashboard indicating a low key fob battery.

Step-by-step Guide to Replacing a Hyundai Elantra Key Fob Battery

Gathering the Necessary Materials

Before you begin, ensure you have the correct replacement battery. For most Hyundai Elantra models, a CR2032 battery will be suitable. In addition, a small flathead screwdriver or a coin will also come in handy.

Precautions Before You Begin

Remember, safety first! Make sure you handle the new battery with clean hands, and avoid touching the battery terminals.

Opening the Key Fob

Unlocking the secrets within your key fob can be a straightforward process, varying slightly between older and newer models. Whether it’s delicately prying open the casing or revealing a hidden button, understanding the procedure is key to accessing and replacing the battery. Let’s delve into the steps for both older and newer key fob models to ensure a smooth battery replacement process.

Procedure for Older Models

For older models, you can typically pry open the fob with a small flathead screwdriver. There is a small slot on the side of the fob where you can insert the screwdriver and gently twist to open.

Procedure for Newer Models

For newer models, there’s a small silver button at the back of the fob. Press it and pull out the physical key. You will see a notch where the key used to be. Use a coin to twist and open the fob.

Replacing the Battery

Once open, you’ll see the battery. Use your screwdriver to gently lift the battery out of its slot. Place the new battery in, ensuring the positive side (+) is facing up.

Testing the New Battery

Once replaced, put the key fob back together. Now, test it with your vehicle to make sure the new battery works properly.

Troubleshooting Key Fob Issues After Battery Replacement

If your key fob is still not working after replacing the battery, it might be due to other issues. In such cases, it’s best to consult with a professional or your Hyundai dealer.

Tips to Extend Your Hyundai Elantra Key Fob Battery Life

To make the most out of your key fob battery, avoid exposing it to high temperatures and keep it away from water. Also, try not to press the buttons when the fob is out of range of your car as it can drain the battery.

Frequently Asked Questions (FAQs)

What type of battery does a Hyundai Elantra key fob use?

Most Hyundai Elantra key fobs use a CR2032 battery.

How often should I replace my key fob battery?

It largely depends on usage, but typically, a key fob battery lasts for about 3-4 years.

What should I do if my key fob isn’t working after battery replacement?

You may need to consult with a professional or your Hyundai dealer

Can I replace the battery myself?

Yes, replacing the key fob battery is a straightforward process.

How can I extend my key fob battery’s lifespan?

Avoid exposing the fob to high temperatures or water, and refrain from pressing buttons when it’s out of range.


Replacing a Hyundai Elantra key fob battery is a simple task that you can easily accomplish on your own. With the right tools and instructions, you’ll have your key fob working like new in no time!

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