How to Replace a Subaru Key Fob Battery Like a Pro: Complete Guide

Ever found yourself locked out because your Subaru key fob battery died at the worst possible moment? Frustrating, right? But fret not, you’re not alone in this struggle. Imagine being able to swiftly replace that battery yourself, saving time and hassle. In this article, you’ll discover the simple steps to change your Subaru key fob battery like a pro. No need to rush to the dealership or wait for assistance. It’s all about empowering you to take control of your key fob’s battery life. Let’s dive in and equip you with the knowledge you need to tackle this task confidently.

Gather the Necessary Tools

To replace your Subaru key fob battery, you’ll need a few essential tools. Here’s what you’ll need:

  • New battery: Check your Subaru’s manual for the specific battery type needed.
  • Small flathead screwdriver or a coin: To open the key fob case.
  • Tweezers: Helpful for handling the small battery with precision.
  • Clean cloth: Use it to keep your work area tidy.

Remember to gather these tools before you begin the battery replacement process.

Identify the Key Fob Model

To begin the process of changing your Subaru key fob battery, you need to identify the specific model of your key fob. Here are the main steps to help you with this:

  • Check the Car Manual: Start by referring to your Subaru’s manual, which should contain details about the key fob model used for your vehicle.
  • Physical Examination: Examine the key fob itself for any markings or labels that indicate its model number or name.
  • Online Resources: If you’re unable to find the information in the manual or on the key fob, consider looking up your Subaru model online or contacting a Subaru dealership for assistance.

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Remember, knowing your key fob model is crucial for selecting the correct replacement battery.

Open the Key Fob

When it’s time to change the battery in your Subaru key fob, the first step is to open the casing. Here’s how you can do it easily:

  • Locate the Notch: Look for a small indent or notch along the seam of your key fob. This is where you’ll insert a flathead screwdriver or a coin to pry open the casing.
  • Carefully Pry Open: Gently insert the screwdriver or coin into the notch and twist it slightly to separate the two halves of the key fob. Be cautious not to apply too much force to avoid damaging the casing.
  • Separate the Halves: Once you’ve loosened the casing, carefully work your way around the key fob to separate the two halves completely. Take note of any buttons or components that may fall out during this process.
  • Access the Battery: With the key fob open, you’ll have clear access to the battery compartment. Depending on the model, you may need to use tweezers or a small screwdriver to remove the old battery.
  • Replace the Battery: Identify the type of battery needed, usually CR2032, and insert the new battery with the correct orientation. Make sure it sits securely in the compartment.
  • Close the Key Fob: Once the new battery is in place, align the two halves of the key fob and press them together until you hear a satisfying click. Ensure that the casing is securely closed before testing the key fob.

Remember, taking your time and being gentle during the process will help you avoid any mishaps while changing the battery in your Subaru key fob.

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Replace the Battery

When it’s time to replace the battery in your Subaru key fob, follow these straightforward steps:

  • Step 1: Locate the battery compartment after opening the casing.
  • Step 2: Carefully remove the old battery, ensuring not to damage any other components inside.
  • Step 3: Insert the new battery with the correct side facing up.
  • Step 4: Gently press the battery in place.
  • Step 5: Close the casing securely to prevent any issues.

Remember: Handling the key fob delicately throughout the process is crucial to avoid damaging any internal parts. After replacing the battery, always make sure the casing is properly closed before testing the key fob’s functionality.

Important Note:
Always use the recommended battery type, such as CR2032, to ensure optimal performance.

Test the Key Fob

Now that you’ve replaced the battery in your Subaru key fob, the next step is to test it and ensure everything is functioning correctly. Here’s what you need to do:

  • Check Functionality: Press the buttons on the key fob to test if it locks and unlocks your car as it should. Test all the buttons to confirm proper functionality.
  • Range Test: Step away from your vehicle and try using the key fob from different distances to check its range. This will help you identify any potential issues with the signal strength.
  • Battery Alignment: Make sure the new battery is properly aligned and securely in place. A loose battery can cause intermittent connection problems.
  • Reprogram if Necessary: If the key fob isn’t working after battery replacement, you may need to reprogram it. Refer to your vehicle’s manual or contact your dealer for guidance.
  • Troubleshooting: If the key fob still doesn’t work correctly, double-check the battery placement and contacts. Clean any dirty contacts that may be affecting connectivity.
  • Professional Assistance: If you’ve followed all the steps and the key fob still isn’t working, it might be time to seek help from a professional locksmith or your Subaru dealer.

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Testing your key fob after replacing the battery is crucial to ensure seamless operation. Follow these steps to make sure your key fob is ready for everyday use.


Ensuring your Subaru key fob functions properly after changing the battery is crucial for hassle-free daily use. By following the outlined steps, you can guarantee that your key fob operates smoothly. Remember to test its functionality, range, and alignment post-battery replacement. If any issues arise, troubleshoot them promptly or seek professional help. With these simple yet essential practices, you can maintain the efficiency of your Subaru key fob and avoid any unexpected inconveniences.

Frequently Asked Questions

Can I replace the battery in my Subaru key fob on my own?

Yes, you can replace the battery in your Subaru key fob on your own. Just make sure to use the correct battery type recommended for your specific key fob model.

What are the crucial steps to test the key fob after replacing the battery?

After replacing the battery, test the key fob by checking its functionality, testing the range, ensuring proper battery alignment, reprogramming if necessary, and troubleshooting any issues that may arise.

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

Testing the key fob after battery replacement is essential to ensure its seamless operation for everyday use. It helps verify that the key fob is working correctly and avoids potential issues with its 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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