How to change battery on hyundai elantra key fob

You’re walking out of the store with your hands full and you press the button on your key fob to unlock your Hyundai. Nothing happens. It seems you have a dead battery. Let us show you how to fix that.

Table of Contents Show

Changing Your Hyundai Key Fob Battery
Video Tutorial
Is Your Smart Key Still Not Working?
What kind of battery does a Hyundai Elantra key fob take?
How do you open a Hyundai Elantra key fob?
Do I have to reprogram my key fob if I change the battery?

Here’s out step-by-step guide for changing a dead battery on a Hyundai Smart Key fob. For more visual learners, you can skip to the bottom for the video tutorial.

Keys Not Working?

Changing Your Hyundai Key Fob Battery

Replacing your Hyundai key fob’s battery is straightforward. All you need is a replacement CR 2032 3V battery. A 5-pack of them usually costs around $3-$5. You will be touching a motherboard during this process, so it’s recommended that you also wear latex gloves to avoid accidental damage.

Remove emergency key from bottom of fob
Insert key into groove between release button and key slot
Turn the key (like you’re unlocking a door) until the fob pops open
Face buttons downward (or they will fall out) and open the fob
Set aside fob half with buttons and remove the barrier and motherboard
Use key to remove dead battery from its bracket
Put the new battery in its bracket + side down
Replace the motherboard, barrier, and button-half of fob
Line up the release button peg with its corresponding hole
Snap the fob back together

And you’re done! To test your Hyundai Smart Key, press any of the buttons. A small red light above the unlock button should flash if everything was done correctly.

Video Tutorial

Is Your Smart Key Still Not Working?

If your Hyundai Smart Key still isn’t working, schedule a service appointment. It may be something other than a dead battery. If you have any questions, give us a call. We’ll be happy to help.

What kind of battery does a Hyundai Elantra key fob take?

Most Hyundai key fobs use a CR2032 battery. Once you have your new Hyundai key fob replacement battery in hand, place it into your key fob in the exact same position as the old one.

How do you open a Hyundai Elantra key fob?

Begin by removing the metal key by pressing and holding the metal tab or button. Next, use the metal key to open the back cover on your key fob by inserting it into the small opening and turning it in either direction. The case should pop right open.

Do I have to reprogram my key fob if I change the battery?

Typically, you do not need to reprogram the key fob after changing the battery. However, if you've replaced not just the batteries but also some of the internal wiring and electronics, you may need to reprogram it by pairing it with your vehicle once again.