“My Hyundai Sonata smart key fob remote is no longer working as well as before. What’s the best method for a Hyundai Sonata key fob battery replacement?”
Without a doubt, the Hyundai Sonata has been the brand’s top luxury 4-door sedan for what seems like an eternity. It was the first car that made me consider buying a Hyundai (even though a rival brand would dub it [“So not a” car]).
Over the years, it has used four different types of key fobs. The “D-Shaped”, “Flip”, “Rectangular”, and “3-Button Grey Hatch” key fobs. All use the same internal CR2032 coin battery.
In this article, we save you the extra cost of a service appointment as you will discover the simplest guide to DIY Hyundai Sonata replacement battery.
For other Hyundai models, see our Hyundai key fob battery page.
| MODEL | TRIMS | YEARS | BATTERY | BUY |
|---|---|---|---|---|
| Sonata | D-Shaped | 2015, 2016, 2017, 2018, 2019, 2020 | CR2032 | Check on Amazon |
| Sonata | Flip | 2015, 2016, 2017, 2018, 2019 | CR2032 | Check on Amazon |
| Sonata | Rectangular | 2011, 2012, 2013, 2014, 2015 | CR2032 | Check on Amazon |
| Sonata | 3-Button Grey Hatch | 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 | CR2032 | Check on Amazon |
How to Replace the Hyundai Sonata “D-Shaped” Smart Key Fob Battery (2015-2020)
Scroll down to see a full video tutorial or keep reading for a step-by-step guide on your Hyundai Sonata key fob battery replacement.
The replacement kit you will need:
• 1x CR2032 battery
• Flat-head screwdriver
• Precision screwdriver (3.0mm/PH0 or smaller)
-or-
• Pen, pencil, toothpick or another thin tool
Buy Small Screwdriver Set on Amazon
How to Change the Hyundai Sonata “D-Shaped” Smart Key Fob Battery
Total Time: 3 minutes
1. Press key fob button to release internal key
Start by pushing the button on the bottom of the key fob to release the internal key.
2. Insert screwdriver, twist to separate key fob halves
Next, insert your flathead screwdriver in the plastic slot next to the keyhole. Gently twist the screwdriver for the two halves of the key fob to pop apart.
3. Swap old battery with new CR2032, positive down
Now, locate the battery. You will need a small screwdriver or similar tool to remove it. Insert your tool into the side of the battery and gently pry it out. Take a new CR2032 battery and click it into place with the positive side facing down.
4. Reattach halves, return key, press button, check light
Reattach the two halves of the key fob and return your internal key. Finally, press one of the buttons and make sure the red light on the front of the key fob comes on. If it does, you’re all set!
Great job replacing your dead battery!
How to Replace the Hyundai Sonata “Flip” Key Fob Battery (2015-2019)
Keep reading for step-by-step instructions for the key fob remote replacement.
What you will need:
• 1x CR2032 battery
• Flat-head screwdriver
• Precision screwdriver (3.0mm/PH0 or smaller)
-or-
• Pen, pencil, toothpick or another thin tool
Buy Small Screwdriver Set on Amazon
Step 1
Use your small flathead screwdriver to pop open the outer case in two spots. Be careful to pop open both spots and not just one! If you just try to pry open one side, you’ll likely break the plastic on the key fob.
Step 2
Once you have the fob plastic shell open, you will need to remove two small Phillips screws to get access to the battery. Once you’ve removed those, take your small flathead and pry out the dead battery.
Step 3
Time to fix in your new battery. Install the new CR2032 coin battery and you’re all set!
Lastly, screw back on the battery cover and pop the outer plastic shell back in place.
That was an easy replacement, wasn’t it?
How to Replace the Hyundai Sonata “Rectangular” Smart Key Fob Battery (2011-2015)
Scroll down to see a full video tutorial or keep reading for a step-by-step guide.
What you will need:
• 1x CR2032 battery
• Flat-head screwdriver
• Precision screwdriver (3.0mm/PH0 or smaller)
-or-
• Pen, pencil, toothpick or another thin tool
Buy Small Screwdriver Set on Amazon
Step 1
The first thing is to hold down the button on the front of the key fob to remove the internal key.
Step 2
With your key out, you can see a slot just beneath the keyhole. Now, take a flat-head screwdriver, insert it into the slot, and twist gently. The two halves of the key fob will come apart seamlessly.
Step 3
Now, use your precision screwdriver (or another thin tool) to pry the battery out. The easiest way to achieve this is to come in from the right side of the battery, push it down to the bottom, and gently pull the tool backward until the battery pops out.
Step 4
Take a new CR2032 battery and install it with the face-down.
Finally, push the two halves of the key fob back together and return the internal key. To determine if the battery has power, the light on the front of the key should turn on when you push a button.
Does the power come on? Great. Excellent work!
How to Replace the Hyundai Sonata “3-Button Grey Hatch” Key Fob Battery (2006-2014)
Changing the battery in this Hyundai Sonata key fob is pretty simple. Scroll down to see a full video tutorial or keep reading for a step-by-step guide.
What you will need the following replacement kit:
• 1x CR2032 battery
• Flat-head screwdriver
Step 1
Locate the slot at the top of the key fob just above the light. There’s a slot that you can use to open the device. Take a flat-head screwdriver, insert it into this slot, and twist carefully. The key fob will pop open, giving you access to the battery.
Step 2
Now, use your screwdriver to push on the bottom of the battery. Push until the battery is loose enough to remove with your fingers.
Step 3
It’s time to replace the old battery with a new one. Fix in the new CR2032 battery under the metal housing until it’s snugly in place. Ensure the positive
Step 4
Finally, click the two halves of the smart key fob remote battery back together.
Test your battery by pushing a button on the key fob; if the light comes on, you did everything right, and you’re good to go. Nice work!
Frequently Asked Questions
What kind of battery does a Hyundai Sonata key fob take?
Most models of Hyundai Sonata use CR2032 battery.
Can I replace the Hyundai Sonata key fob by myself?
Yes, you can easily replace your old battery with a new one when you follow my Hyundai Sonata key fob battery replacement guides above.
Bottom Line
While a smart key fob battery is expected to last for several years, there may be a need for an earlier replacement due to some factors such as moisture, sunlight, or heat. The good thing is that our DIY Hyundai Sonata battery replacement will perfectly guide you as long as you’re purchasing the right replacement kit.
If your key fob still doesn’t work after following the above guide, be sure to check the owners manual details to verify that you’re using the correct remote battery type.