How to Change Hyundai Car Key Battery: A Simple Guide for Everybody

If your Hyundai car is not locking/unlocking with the key fob or not starting with the remote, the most common reason is that the key fob battery is dead. But there’s no need to worry! In this article, we’ll explain in simple language how to replace the battery in a Hyundai key fob — and you won’t need a mechanic’s help at all.

How to Know It’s Time to Change the Battery?

If you notice any of the following signs, it means the battery is getting weak:

It takes time to lock or unlock the car using the key fob.
The remote range has reduced.
The key fob’s indicator light is dim or not working.
The car won’t start with the Push Start button.

What You’ll Need Before Changing the Battery

To change the battery, you’ll need a few essential items:

A new battery (usually CR2032 or CR2025, but the correct type will be written on the back of the key)
A small screwdriver or a thin object (like a paper cutter)
A clean cloth or tissue

How to Replace the Hyundai Key Fob Battery – Easy Steps

Step 1: Open the Key Fob

First, carefully hold the key fob in your hand. You’ll see a small slot (opening) on the edge or back.
Gently insert the screwdriver or thin object into that slot.
Apply light pressure to separate the two halves.
(Note: Don’t apply too much force, or the plastic might break.)

Step 2: Remove the Old Battery

Inside the key fob, you’ll find a round battery.
Carefully take it out.
While removing, note the direction in which the battery was placed.

Step 3: Insert the New Battery

Now insert the new battery in the same direction as the old one.
Make sure the side positioning is the same.
Ensure the battery is properly fitted.

Step 4: Close the Key Fob

Rejoin both halves and press lightly to snap the key fob back together.
If you hear a “click” sound, the key is securely closed.

What to Do After Replacing the Battery?

After replacing the battery, test the key fob.
Try locking/unlocking the car and starting it.
If everything works fine, you’ve done it successfully!

Some Important Tips

Always use a good quality battery (such as Duracell, Panasonic, etc.).
Don’t throw the old battery in the trash take it to a battery recycling center or an e-waste collection box.
If you’re changing the battery for the first time, read the article carefully or watch a video tutorial if available it will make the process easier to understand.