How to Replace Buick Key Fob Battery: Step-by-Step Guide

Ever found yourself stuck outside your Buick, frantically pressing the key fob button with no response? Frustrating, right? Well, what if I told you that a simple solution lies in replacing the key fob battery? Imagine the convenience of swiftly unlocking your car with just a click of a button.

Picture this: You’re rushing to an important meeting, and your key fob decides to act up. Sounds like a nightmare, doesn’t it? But fear not, for in just a few minutes, you could be back on track with a fully functional key fob.

Step 1: Gather the necessary tools

When it comes to replacing your Buick key fob battery, the first step is to gather all the essential tools. Here’s what you’ll need:

  • Replacement Battery: Ensure you have the correct battery model for your Buick key fob.
  • Small Flathead Screwdriver or Coin: You’ll need this to open the key fob case.
  • Clean Cloth: Useful for wiping any dirt or residue from the key fob.

It’s important to have everything ready before you start the battery replacement process to make it as smooth as possible.

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Step 2: Locate the battery compartment

Let’s find where the battery in your Buick key fob is tucked away. It’s typically situated on the back of the fob. Look for a small slot or button marked with an unlocking icon.

  • Most key fobs: Check the back cover for a small groove where you can insert a flathead screwdriver. Gently press or slide the tool into the slot to release the cover.
  • Keyless entry fobs: Some models have a push-button or slide mechanism. Look for a tab or indent on the side that you can press or move to access the battery compartment.

Once you locate the opening mechanism, apply gentle pressure to release it. Avoid using excessive force to prevent damage to the key fob casing.

Remember, each key fob design may vary slightly, so be patient when exploring how to access the battery compartment in your specific model.

Step 3: Remove the old battery

To access the old battery in your Buick key fob, carefully remove the cover by following these steps:

  • Locate the battery compartment on the key fob.
  • Use a small screwdriver to gently pry open the cover.
  • Remove the old battery from its slot.
  • Dispose of the old battery properly.

Remember, each key fob model may vary slightly, so refer to your specific instructions if needed.

Keep in mind the importance of handling the battery with care to avoid any damage when replacing it.

Important Tips
Handle the battery by the edges to prevent any contact with skin oils.
Ensure the new battery is properly aligned before closing the cover.

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Step 4: Insert the new battery

When it comes to inserting the new battery in your Buick key fob, follow these straightforward steps to ensure a smooth process:

  • Identify Battery Orientation: Check the orientation of the new battery – it typically fits with the engraved side facing up.
  • Align and Insert: Carefully align the new battery in the compartment, ensuring it fits snugly. More force isn’t better; gentle pressure is sufficient.
  • Securely Close the Compartment: Once the new battery is correctly placed, close the cover of the battery compartment securely.

Following these steps correctly will help you effortlessly replace the battery in your Buick key fob.

Step 5: Test the key fob

To ensure your Buick key fob is working correctly after replacing the battery, follow these simple steps:

  • Testing the Lock and Unlock Buttons: Press the lock and unlock buttons on the key fob to verify that they respond by locking and unlocking your car doors.
  • Check the Remote Start Functionality: If your key fob has a remote start button, test it to see if it successfully starts your car remotely.
  • Testing the Trunk Release Button: If your key fob has a trunk release button, press it to confirm that it opens your car’s trunk.
Functionality Tested Result
Lock/Unlock Buttons OK
Remote Start OK
Trunk Release OK


You’ve learned the essential steps to replace the battery in your Buick key fob with ease. By following the instructions to check the battery orientation, align it correctly, and securely close the compartment cover, you can ensure your key fob functions smoothly. Remember to test the key fob after battery replacement by checking the lock and unlock buttons, remote start feature, and trunk release button. The results from the testing table confirm that your key fob is in good working order. Keep these tips in mind for hassle-free maintenance of your Buick key fob.

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Frequently Asked Questions

How do I insert a new battery into a Buick key fob?

To insert a new battery into a Buick key fob, first, check the battery orientation. Align the new battery properly in the compartment. Securely close the compartment cover.

What should I do after replacing the key fob battery?

After replacing the key fob battery, test the key fob functions. Check the lock and unlock buttons, remote start functionality, and trunk release button to ensure they are working correctly.

How can I verify the key fob functions after battery replacement?

Verify the key fob functions by testing the lock and unlock buttons, remote start feature, and trunk release button. Confirm that each function operates properly according to the testing table provided in the article.

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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