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

Ever found yourself locked out of your Buick because the key fob battery decided to call it quits at the worst possible moment? Frustrating, right? But fret not, because in this article, you’ll discover the simple steps to replace the battery in your Buick key fob all on your own.

Imagine the convenience of never having to worry about being stranded due to a dead key fob battery again. With just a few minutes of your time and a new battery, you’ll be back in control of your vehicle’s access in no time. Say goodbye to the stress of unexpected lockouts and hello to hassle-free key fob maintenance.

By the end of this article, you’ll have the knowledge and confidence to tackle the task of replacing your Buick key fob battery like a pro. Get ready to say goodbye to key fob battery woes and hello to a smoother, more efficient driving experience.

Gather the Necessary Tools

When it comes to replacing the battery in your Buick key fob, having the right tools at your disposal can make the process smoother and more efficient. Here’s what you’ll need:

  • New Battery: First and foremost, ensure you have the correct replacement battery for your Buick key fob. Check your vehicle’s manual for the specific battery type required.
  • Small Flathead Screwdriver or Pry Tool: This tool will come in handy when opening the key fob casing without causing any damage.
  • Tweezers or Small Needle-Nose Pliers: These tools will help you handle the small battery with precision and ease during the replacement process.
  • Clean Cloth or Paper Towel: It’s always a good idea to have a clean surface to work on and wipe the key fob clean if needed.
  • Magnifying Glass (Optional): For better visibility, especially if you’re dealing with tiny components inside the key fob.

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Before you start the battery replacement process, gather these tools in one place to ensure a hassle-free experience. Remember, having the right tools at hand can make all the difference in successfully replacing your Buick key fob battery.

Determine the Key Fob Battery Type

To successfully replace the battery in your Buick key fob, you first need to determine the type of battery your device uses. Here’s how you can do it:

  • Check the owner’s manual for specific information on the key fob’s battery type.
  • If you don’t have the manual, look for online resources that provide details on Buick key fob batteries.
  • Alternatively, you can open the key fob to locate and identify the current battery.

Identifying the correct battery type is crucial for purchasing the right replacement. If you’re unsure about which battery to choose, you can always consult a professional or a dealership for guidance.

Open the Key Fob Shell

To open the key fob shell, you’ll need to locate the small grooves or screws around the perimeter. Insert a flathead screwdriver or a prying tool into the indicated slot, gently twist to separate the halves.

Once you’ve loosened the shell, carefully pry the two sides apart. Be cautious not to damage the internal components or the buttons. Take your time to avoid accidents like snapping the shell or losing parts.

After successfully opening the key fob shell, you’ll have access to the key fob’s interior where the battery is housed. Pay attention to how the battery is placed, noting its position and the orientation.

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Some key fobs may have additional layers inside. If you encounter this, handle each layer with care, keeping track of the placement. You’ll need to reassemble the key fob in the reverse order after replacing the battery.

Replace the Old Battery

When it comes to replacing the battery in your Buick key fob, the process is straightforward once you have accessed the battery compartment. Here’s how you can safely and effectively swap out the old battery:

  • Identify the Battery Type: Before removing the old battery, make sure you have the correct replacement on hand. Buick key fobs commonly use CR2032 batteries, but it’s always wise to double-check.
  • Remove the Old Battery: Gently pry out the old battery from its housing. You may need a small tool like a screwdriver to help with this step. Be careful not to damage the surrounding components as you do this.
  • Insert the New Battery: Position the new battery in place, ensuring it is facing the correct way based on the orientation of the old one. Press it down gently to secure it in the compartment.
  • Close the Battery Compartment: Once the new battery is in place, carefully close the battery compartment. Ensure that the halves align properly before snapping them shut.
  • Test the Key Fob: Before reassembling the entire key fob, test it to ensure the new battery is working correctly. Press the buttons to verify that the key fob responds as expected.
  • Reassemble the Key Fob: If the test is successful, proceed to reassemble the key fob by aligning the two halves and securing them together. You’ll want to make sure everything fits snugly back into place.

By following these steps, you can successfully replace the battery in your Buick key fob, ensuring that your key fob continues to function as intended.

Reassemble the Key Fob

After successfully replacing the battery in your Buick key fob, it’s time to reassemble it to complete the process and ensure proper functionality.

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Here’s how to reassemble your key fob:

  • Step 1: Place the key fob shell back together

  • Align the front and back covers of the key fob to ensure they fit snugly together.
  • Step 2: Insert the key fob circuit board

  • Gently place the circuit board back into the key fob shell, making sure it fits properly in its place.
  • Step 3: Close the key fob

  • Carefully press the key fob shell together to close it securely. Ensure that all edges are aligned correctly.
  • Step 4: Test the key fob

  • Press the buttons on the key fob to test if the new battery is working correctly. Make sure all buttons are responsive.
  • Give the key fob a final inspection to ensure everything is intact and properly assembled.

By carefully following these steps, you will successfully reassemble your Buick key fob and can now enjoy using it without any battery-related issues.


You now have all the necessary steps to confidently replace the battery in your Buick key fob. By following the detailed guide provided, you can ensure that your key fob functions smoothly with its new battery. Remember to align the shell, insert the circuit board correctly, close the fob securely, and test the buttons for proper functionality. With these simple yet crucial steps, you can enjoy a hassle-free experience with your Buick key fob. Happy driving!

Frequently Asked Questions

Q: Why is it important to align the shell properly when replacing the battery in a Buick key fob?

A: Aligning the shell ensures the components fit snugly, preventing damage or malfunction.

Q: How should I insert the circuit board when replacing the battery in a Buick key fob?

A: Insert the circuit board gently to avoid any damage to the delicate components.

Q: Why is it crucial to close the key fob securely after replacing the battery?

A: Closing the fob securely prevents dust and moisture from entering, prolonging the key fob’s lifespan.

Q: What should I do after replacing the battery in a Buick key fob to ensure it functions correctly?

A: Test all the buttons on the key fob to verify the new battery’s correct installation and functionality.

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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