How to Replace a Hyundai Key Fob Battery: A Step-by-Step Guide

Ever found yourself locked out of your car because your Hyundai key fob battery decided to call it quits at the worst possible moment? Frustrating, right? But fret not, you’re not alone in this key fob battery saga.

Picture this: You’re rushing to get somewhere important, only to realize that your key fob is as lifeless as a rock. That’s where knowing how to change the battery in your Hyundai key fob can be a real lifesaver.

Gather the necessary tools

When it comes to changing the battery in your Hyundai key fob, having the right tools at hand is crucial. Here’s what you’ll need:

  • New Battery: Make sure you have the correct replacement battery for your Hyundai key fob. Refer to your user manual for the specific battery type.
  • Small Flat-head Screwdriver or Key: You’ll need this to open the key fob casing. A flat-head screwdriver or even your house key can work for this task.
  • Tweezers: These can be handy for handling the small battery inside the fob.
  • Clean Cloth: It’s always good to have a clean cloth nearby to wipe any dirt or grime from the key fob while you have it open.
  • Patience and Care: Changing the battery may require gentle handling of delicate components, so take your time and handle everything with care.
  • Well-Lit Workspace: Ensure you have enough light to see what you’re doing clearly.

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Now that you’ve gathered all the necessary tools, you’re ready to proceed with changing the battery in your Hyundai key fob. Let’s move on to the next steps.

Locate the battery compartment

When changing the battery in your Hyundai key fob, the first step is to Locate the battery compartment. Here’s how:

  • Search for a groove: Look for a small groove or slot on the back of your key fob.
  • Use a tool: Insert a small flat-head screwdriver or even your key into the groove.
  • Gently pry open: Apply gentle pressure to pry open the key fob.

Once you’ve found the battery compartment, you’re ready to move on to the next step in replacing the battery.

Remove the old battery

When replacing the battery in your Hyundai key fob, the next step is to remove the old one carefully. Follow these steps:

  • Locate the old battery within the compartment.
  • Use a small tool, like a flat-head screwdriver or key, to gently pry the old battery out.
  • Take note of the battery’s position to ensure you insert the new one correctly.
  • Dispose of the old battery properly according to local regulations.
  1. Identify the battery orientation.
  2. Slide your tool under the battery and lift it out gently.
  3. Avoid using excessive force to prevent damaging the key fob casing.

Follow these steps carefully to safely remove the old battery from your Hyundai key fob.

Insert the new battery

When inserting the new battery into your Hyundai key fob, it’s essential to handle it carefully to avoid any damage to the device. Follow these simple steps for a smooth replacement process:

  • Check the Battery Orientation: Ensure the new battery is facing the correct way before placing it into the key fob.
  • Gently Insert the Battery: Carefully slide the new battery into the slot, making sure it fits snugly.
  • Double-Check Positioning: Confirm that the battery is in the correct position to guarantee proper functioning.
  • Secure the Battery: Press down gently on the battery to secure it in place within the compartment.

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Remember, patience is key when handling delicate components. With these steps, you’ll successfully insert the new battery into your Hyundai key fob without any issues.

Test the key fob

To ensure that the battery replacement process was successful, test the key fob after inserting the new battery. Here’s how to do it:

  • Step 1: Go near your Hyundai car.
  • Step 2: Press any button on the key fob to check if it responds.
  • Step 3: Ensure the range within which the key fob works.
  • Step 4: Test each button on the key fob, including the lock, unlock, trunk release, and panic buttons.
  • Step 5: If the buttons don’t work, try reinserting the battery, ensuring the correct orientation.

Tips for Testing the Key Fob

  • Ensure precision: Press the buttons deliberately to accurately test the fob’s functionality.
  • Range check: Test the key fob’s range from different distances to ensure it functions across various scenarios.
  • Observe response: Note how quickly the car responds to the key fob signals.

Key Fob Testing Troubleshooting

  • If the key fob still does not work after battery replacement, you may need to consult a professional or refer to the car manual for more detailed troubleshooting steps.
  • Sometimes, issues might not be related to the battery but to the key fob itself. In such cases, it’s best to seek professional assistance.

Testing the Key Fob: A Crucial Step

Testing the key fob is vital to confirm that the new battery is functioning correctly and that your Hyundai car responds accurately to the fob signals.


Ensuring your Hyundai key fob has a properly functioning battery is essential for seamless access to your vehicle. By following the outlined steps in this guide, you can easily replace the battery in your key fob and avoid any potential lockout situations. Remember to test the key fob after replacing the battery to confirm its responsiveness and functionality. Troubleshooting any issues promptly will help maintain the effectiveness of your key fob and ensure it communicates effectively with your car. With these simple steps, you can keep your Hyundai key fob in optimal working condition, providing you with convenient and reliable access to your vehicle.

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Frequently Asked Questions

Where is the battery compartment located in a Hyundai key fob?

The battery compartment in a Hyundai key fob is typically located on the back of the device. Look for a small groove or tab that can be used to open the compartment easily.

How do I remove the old battery from my Hyundai key fob?

Carefully open the battery compartment using a flathead screwdriver or a coin. Take out the old battery by gently sliding it out, avoiding any unnecessary force that may damage the key fob.

What type of battery should I use to replace the one in my Hyundai key fob?

When replacing the battery in your Hyundai key fob, make sure to use a CR2032 battery or the specific type recommended by the manufacturer.

How can I test my Hyundai key fob after replacing the battery?

After replacing the battery, test the key fob by checking if the buttons respond correctly, the range is adequate, and the functionality remains intact.

What should I do if my Hyundai key fob is still not working after replacing the battery?

If your Hyundai key fob is not working after battery replacement, try reinserting the battery, ensuring correct orientation. If issues persist, consult the vehicle manual or contact a professional for further assistance.

Battery industry professional with 5+ years of experience. Bachelor of Science in Electrical Engineering from Georgia Tech. Specializes in power systems and renewable energy.

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