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

Ever found yourself stranded outside your car, frantically clicking a Honda key fob that just won’t respond? Frustrating, right? You’re not alone. It’s a common issue that many Honda owners face. But worry not, because in this article, you’ll discover the simple steps to replace the battery in your Honda key fob.

Imagine the convenience of smoothly unlocking your car with just a click of your key fob every time, without any hiccups. No more last-minute dashes to the dealership or searching for a professional to fix it. By learning how to replace the battery yourself, you’ll save time, money, and unnecessary stress. So, why wait? Let’s dive in and get your Honda key fob back to its prime working condition in no time.

Check the Battery Type

When it comes to replacing your Honda key fob battery, the first step is to Check the Battery Type. Different Honda key fobs may use various battery types, so it’s essential to identify the correct one to ensure a successful replacement process.

Here are a few common battery types used in Honda key fobs:

Battery Type Common Honda Models
CR1616 Accord, Civic
CR2032 CR-V, Pilot
CR2025 Fit, HR-V

To determine the battery type your Honda key fob uses, you can usually find this information in the owner’s manual. If you don’t have the manual on hand, you can inspect the current battery inside the key fob. The battery type is typically printed on the battery itself.

Knowing the correct battery type is crucial, as using the wrong one can damage the key fob or result in improper functioning. Once you have identified the correct battery type, you can proceed with purchasing the replacement battery.

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Gather the Necessary Tools

When getting ready to replace the battery in your Honda key fob, it’s essential to have the right tools on hand. Here are the items you’ll need:

  • New Battery: Make sure to purchase the correct battery type for your Honda key fob. Refer to the owner’s manual or check the current battery to determine the right size (e.g., CR1616, CR2032, CR2025).
  • Small Flathead Screwdriver or Coin: You’ll need a tool to open the key fob casing. A small flathead screwdriver or a coin can help you pry open the casing without damaging it.
  • Clean Cloth: It’s helpful to have a clean cloth nearby to wipe any debris or dirt from the key fob or your hands during the process.
  • Tweezers: In some cases, tweezers can be handy for removing the old battery from its housing and inserting the new one.
  • Safety Gloves (optional): If you prefer added protection for your hands, wearing safety gloves can help prevent any injuries while working on the key fob.

Once you have gathered these tools, you’ll be ready to proceed with replacing the battery in your Honda key fob.

Open the Key Fob

When opening your Honda key fob, you’ll need to locate the seam around the edges. Insert a flathead screwdriver or a coin into the seam and twist gently to separate the two halves of the fob.

Carefully pry open the fob to reveal the inside components. Take note of the position of the old battery before removing it to ensure the new one is inserted correctly.

Replace the Battery

To Replace the Battery in your Honda key fob, follow these simple steps:

  • Step 1: Locate the battery compartment on your key fob. This is usually on the back cover.
  • Step 2: Use a small screwdriver to carefully open the compartment. Be gentle to avoid damaging the fob.
  • Step 3: Take note of how the old battery is placed before removing it. This ensures the new battery is inserted correctly.
  • Step 4: Remove the old battery and replace it with a new one of the same size and type.
  • Step 5: Close the battery compartment securely.
  • Step 6: Test the key fob to ensure the new battery is working properly.

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Remember, having a spare battery on hand is always a good idea to avoid any unexpected issues with your key fob.

Test the Key Fob

When you have successfully replaced the battery in your Honda key fob, it’s crucial to test it to ensure everything is functioning as it should. Follow these steps to conduct a quick and effective test:

  • Press the Buttons: Start by pressing the buttons on the key fob. Check if the lock, unlock, and trunk release buttons are responding properly.
  • Check Range: Walk a few steps away from your car and test the key fob’s range by trying the lock and unlock buttons. Make sure they work from a reasonable distance.
  • Key Fob Functions: Test any additional functions your key fob may have, such as panic or remote start. Ensure all functions are working smoothly.
  • Battery Connection: Verify that the new battery is securely in place and making proper contact inside the key fob.
  • Multiple Tests: Repeat the tests a few times to confirm consistent performance and to rule out any intermittent issues.
  • Spare Battery: Remember to keep a spare battery on hand for future use. It’s always practical to be prepared for unexpected battery failures.

Testing your key fob after a battery replacement ensures that you can rely on it without any malfunctions. It’s a simple yet essential step in maintaining the functionality of your Honda key fob.


Ensuring your Honda key fob functions properly is essential for your convenience and security. By following the simple steps outlined in this guide, you can easily replace the battery in your key fob and test its performance. Remember to press the buttons, check the range, and verify the battery connection to guarantee smooth operation. Keeping a spare battery handy is a smart precaution to avoid any unexpected issues. Regularly testing your key fob post-battery replacement will help maintain its effectiveness and reliability. With these tips, you can keep your Honda key fob in top condition and enjoy hassle-free access to your vehicle.

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Frequently Asked Questions

How do I test the key fob after replacing the battery?

After replacing the battery in your Honda key fob, press all the buttons to ensure they work, check the range by using the key fob at different distances from the car, test additional functions like trunk release or panic button, verify the battery connection is secure, conduct multiple tests over a few days to ensure consistent performance, and always keep a spare battery handy for future replacements.

Why is testing the key fob post-battery replacement important?

Testing the key fob after battery replacement is crucial to ensure it functions reliably. By following the testing steps, you can verify that the new battery has been installed correctly, all buttons work as intended, and the key fob maintains consistent performance over time. Regular testing helps maintain the key fob’s effectiveness and prevents any issues with its operation.

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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