How to Change a Hyundai Key Fob Battery

Picture of a Hyundai key fob 

Many drivers search for how to change the battery in a Hyundai key fob, but the process may not always be as easy as it seems. Luckily, your friends here at Colonial Hyundai in New London, CT, are here to offer some guidance on changing a Hyundai key fob battery; plus, we're always available to schedule you for a service appointment right here at the dealership. Without further ado, let's get into it.

Importance of Key Fob Maintenance

As a Hyundai owner and driver, taking care of your key fob is a good idea. Not only does your Hyundai key fob let you into your car, truck, or SUV, but it also allows you to start your Hyundai vehicle remotely. If you need to know how to change the battery in a Hyundai key fob, you can refer back to this step-by-step guide to avoid too much disruption on or off the road.

Tools Needed

The tools you need to change the battery in a Hyundai key fob include a new battery, as well as a small flathead screwdriver or a coin to pry open the fob. That said, newer fobs come with a tool to remove from them to open the back casing.

List of Required Tools

Your tools required to change a Hyundai key fob battery are:

  • CR2032 battery (suggested battery type)
  • Flathead screwdriver (for older models)

Recommended Battery Type

The best battery to use when replacing the one inside your Hyundai key fob is a CR2032 battery. Depending on what is currently inside your key fob, you might also want to search for a small lithium coin cell battery, like the CR2032, CR2025, or CR2016. Always try to use the exact type of battery that is first included in the fob by Hyundai.

How to Change the Battery in a Hyundai Key Fob

If you're wondering how to change the battery in a Hyundai key fob, follow this simple step-by-step guide to do it at home.

Step 1: Identify Your Key Fob Model

The first thing you want to do when changing your Hyundai key fob battery is to inspect it, note its model and opening method, and refer to your user manual if you are having trouble.

Step 2: Open the Hyundai Key Fob

In newer Hyundai key fobs, you will find a metal key to open the back cover by inserting it into a small slot and twisting, while older fobs require a coin or flathead screwdriver to remove the back cover.

Step 3: Remove the Old Battery

Once you find the necessary tools to open your Hyundai key fob, you want to remove the back cover, gently remove the battery, and inspect it to see what type it is. We recommend taking a photo of how the battery looks inside the fob before removing it.

Step 4: Insert the New Battery

With your new and correct model battery, you can insert it directly into the fob, following the same position as the first one. Your battery should operate once the new battery is inside, so try to test unlocking or locking your Hyundai before putting the cover back on.

Step 5: Reassemble the Key Fob

After you get the new battery into the Hyundai key fob of your car, it is time to reassemble it. Like before, you want to use the provided tool or your coin/screwdriver. Once you have the back cover, put it back on your key fob and store the tool back into the fob or place it somewhere safe where it will not get lost.

Testing the Key Fob

After installing a new battery into your Hyundai key fob, the best thing to do is to test it out. As we said earlier, you can try this with the back cover still removed if you aren't sure the new battery is correct, or you can wait until everything is assembled again. In the worst case, you will need to disassemble it again, try another position or battery, and repeat this process.

If your Hyundai key fob does not work and you think something is wrong, the pros at Colonial Hyundai will be here to step in. We offer weekday servicing here in New London and will be ready to get you a replacement fob if necessary.

Troubleshooting Common Issues

Common Hyundai key fob battery issues we troubleshoot have to do with a dead battery, signal interference, or even de-programming your fob altogether. Typically, a new battery will do the trick if that is what is causing the failure in the first place. However, if this does not work, you could be dealing with a defect or damaged fob that needs to be swapped out for a new one.

We also want to note that electronic devices or strong radio signals can interfere with the key fob's signal, causing it not to turn on your Hyundai, lock or unlock doors, or work following a new battery.

When to Visit a Hyundai Dealership

The best time to see your local Hyundai team is when your at-home key fob troubleshooting fails. Here at Colonial Hyundai, we bring in new and used car owners struggling with their key fobs weekly, so there is no reason we cannot handle your request as soon as you need it. A new battery is a standard solution to a dead fob, but if the battery you install is wrong, that could also be causing the hiccup.

Remember, you want to use a small lithium coin cell battery, like the CR2032, CR2025, or CR2016, with the CR2032 most commonly needed for Hyundais.

Schedule Service at Colonial Hyundai

Anytime you need service for your Hyundai car, truck, or SUV, the team at Colonial Hyundai in New London, CT, is always here to step in. Now that you know how to change the battery in a Hyundai key fob, you can try replacing it at home. But if you need help, our service center is open every week from Monday to Friday, so do not hesitate to give us a call or swing by when you need help with your vehicle.