You've just found out that the key fob on Your 2015 Hyundai Sonata doesn't work and it looks like its the battery. The battery type used on Your Sonata is CR2032. To replace the battery on Your key fob is very simple. If You've done it before it's a piece of cake and You don't need me. If You've never done it before, go ahead and grab a tiny flathead screwdriver or a credit card. Use the screwdriver or credit card to pry open the key fob gently. Once the key is open, remove the old battery and place in the new one. Close the key fob and You'll be good to do.
William B.
April 10, 2020
You can replace the key fob battery in your 2015 hyundai sonata with the cr2032 battery at a little under 6 dollars, for a do-it-yourself repair that's simple and inexpensive.
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