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

Ever found yourself locked out of your Subaru because the key fob battery decided to call it quits at the worst possible moment? Frustrating, right? But don’t worry, you’re not alone. If you’re tired of these unexpected surprises, it might be time to take matters into your own hands.

Step-by-Step Guide to Disassembling the Key Fob

To change the battery in your Subaru key fob, you first need to disassemble it. Follow these steps:

  • Step 1: Look for the small notch on the side of the key fob.
  • Step 2: Insert a flathead screwdriver or a coin into the notch and twist gently to separate the key fob into two halves.
  • Step 3: Be careful not to damage the key fob or lose any small parts during this process.
  • Step 4: Once the key fob is open, locate the battery compartment.

Remember, it’s essential to handle the key fob components delicately to avoid any accidental damage.

Identifying the Battery Type for Your Subaru Key Fob

To determine the battery type required for your Subaru key fob, you can follow these steps:

  • Check the Owner’s Manual: Locate the section that details the key fob specifications, including the type of battery used.
  • Inspect the Battery: Open your key fob and examine the battery for any identifying markings (e.g., model number or type).
  • Research Online: If you can’t find the information in the manual or on the battery, consider searching online using your key fob model number.
  • Visit an Auto Parts Store: Take the old battery to an auto parts store where the staff can help you identify and provide a replacement.

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Battery Type Compatibility
CR1620 Subaru Legacy, Outback, Impreza
CR2032 Subaru Forester, Crosstrek, Ascent

Remember, using the correct battery type ensures smooth key fob operation and avoids potential inconveniences.

Let’s move on to the next step in replacing your Subaru key fob battery.

Purchasing the Right Replacement Battery

When it comes to replacing the battery in your Subaru key fob, selecting the correct replacement battery is crucial. Here’s how to ensure you purchase the right one:

  • Check the owner’s manual: It often contains specific information about the compatible battery for your key fob.
  • Inspect the current battery: Look for any markings on the existing battery that indicate its type and specifications.
  • Research online: Websites or forums related to Subaru vehicles may provide insights on the recommended battery for your key fob.
  • Visit an auto parts store: The experts at the store can assist you in finding the exact battery needed for your Subaru key fob model.

Having the appropriate replacement battery is essential to sustain the functionality of your Subaru key fob. Ensuring compatibility will help you avoid any issues with the key fob operation in the future.

Removing the Old Battery Safely

When it’s time to replace the battery in your Subaru key fob, it’s essential to remove the old battery safely to prevent any damage. Here’s how you can do it in a few simple steps:

  • Locate the Battery Compartment: Look for a small slot or indent on the key fob where the battery is housed.
  • Use a Thin Tool: Carefully insert a thin tool, like a flathead screwdriver or a coin, into the slot to pop open the cover.
  • Remove the Old Battery: Once the cover is open, gently take out the old battery and make sure to note its position.
  • Dispose of the Old Battery Properly: Remember to recycle the old battery following the proper guidelines in your area.

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Taking these steps will ensure a smooth transition to installing a new battery in your Subaru key fob.

Installing the New Battery Properly

When installing the new battery in your Subaru key fob, it’s crucial to pay attention to the following steps to ensure it’s done correctly:

  • Select the Correct Battery: Refer to your key fob manual to find the specific battery model required for your Subaru key fob.
  • Handle the New Battery Carefully: Avoid touching the battery terminals with your fingers. Grease and dirt can affect the battery’s performance.
  • Insert the Battery Correctly: Place the new battery in the compartment with the (+) side facing up as indicated in the manual to prevent damage.
  • Close the Battery Cover Securely: Make sure the cover is properly closed to prevent the battery from dislodging during use.
  • Test the Key Fob: After replacing the battery, test your key fob to ensure it’s functioning correctly. If there are any issues, double-check the battery installation.

By following these steps, you’ll be able to safely and effectively install a new battery in your Subaru key fob.

Testing the Key Fob Functionality

After changing the battery in your Subaru key fob, it’s crucial to test it to ensure proper functionality. Here are the steps to follow:

  • Check Remote Operation:
  • Press the buttons on the key fob to see if it unlocks and locks your car.
  • Ensure the panic button functions as intended.
  • Test Proximity Feature:
  • Try starting your car to verify that the key fob’s proximity feature is working correctly.
  • Verify Signal Strength:
  • Test the key fob from different distances to confirm that the signal strength is consistent.
  • Replace the Battery Cover:
  • Double-check that the battery cover is securely in place to prevent it from coming loose.

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To guarantee continued reliable performance, don’t forget to periodically check your key fob’s battery and replace it when necessary.


You now have the knowledge to confidently change the battery in your Subaru key fob. Remember to follow the steps carefully, test the key fob’s functions post-replacement, and keep an eye on the battery’s performance. By taking these simple steps, you can ensure that your key fob continues to operate smoothly and reliably. Happy key fob maintenance!

Frequently Asked Questions

What battery model should I use for my Subaru key fob?

You should use a CR2025 battery for your Subaru key fob.

How should I handle the battery when replacing it in the key fob?

Handle the battery carefully by avoiding bending or damaging it.

How do I insert the new battery into the key fob?

Insert the new battery with the positive side facing upwards.

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

Test the key fob by checking remote operation, proximity feature, signal strength, and battery cover security.

Why is it important to periodically check the key fob’s battery?

It is important to ensure continued reliable performance of the key fob.

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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