Unlocking Secrets: How to Reset Your Subaru Key Fob with a Battery Change

Do you own a Subaru car that uses a key fob for entry and ignition? If so, you know how convenient and essential it is to have a functional key fob. It allows you to lock and unlock your car from a distance, start your vehicle remotely, and more. However, what happens when your Subaru key fob stops working due to a dead battery? In this article, we will guide you through the steps to reset your Subaru key fob with a battery change, troubleshooting tips, and more.

The Importance of the Key Fob in Subaru Cars

Subaru key fobs are electronic devices that communicate with your car’s security system. They allow you to arm and disarm your car’s alarm, open your trunk, and, most importantly, start your car’s engine. The key fob transmits a unique signal to your car, allowing it to recognize the fob as authorized, and the car unlocks for the driver.

Without a functional key fob, you would have to manually unlock your vehicle and insert the key into the ignition to start your Subaru manually. Additionally, if you lose your key fob, you may have to replace the entire key fob programming, which can be time-consuming and expensive. Thus, it’s crucial to ensure that your key fob functions optimally and is always in good condition.

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How to Know If Your Key Fob Battery Needs Changing

Before resetting your Subaru key fob, you must determine if the battery needs changing. Identifying that the key fob battery needs replacing is simple. When the battery power is running low, you may notice the following:

  • The key fob’s range becomes shorter
  • The key fob functions erratically or doesn’t work at all
  • You notice a warning symbol on the dashboard

If you are experiencing any of the above issues, it’s time to replace your Subaru key fob battery.

Step-by-Step Instructions on Resetting Your Key Fob After a Battery Change

Resetting your Subaru key fob after a battery change is a straightforward process. However, it’s important to note that the steps may differ based on the year or model of your Subaru vehicle. Check your owner’s manual to confirm the correct procedure for your particular car.

Step 1. Gather the Required Materials

Before you start to reset your Subaru key fob, ensure that you have the following materials:

  • A new battery (typically a CR2025 lithium battery)
  • Your Subaru key fob

Step 2. Open Your Key Fob

Use a small flathead screwdriver to gently pry open the key fob’s case. Be careful not to damage the key fob or harm yourself in the process.

Step 3. Remove Old Battery

Safely remove the old battery with a pair of tweezers or your fingers. Do not throw the old battery in the trash; recycle it instead.

Step 4. Insert New Battery

Insert the new battery into the key fob, ensuring that the positive side (+) faces up.

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Step 5. Reassemble Key Fob

Reassemble the key fob, ensuring that it snaps back into place.

Step 6. Reset Your Key Fob

Follow these steps to reset your Subaru key fob:

  • Sit inside the car with your key fob.
  • Hold the key fob close to the push-button ignition switch.
  • Press and hold the lock and unlock buttons on the key fob simultaneously for approximately 15 seconds.
  • Release the buttons when you hear the car horn beep and see the hazard lights flash.

Congratulations! You have successfully reset your Subaru key fob.

Troubleshooting Tips If the Key Fob Does Not Reset

If your Subaru key fob does not reset after following the steps outlined above, consider the following troubleshooting tips:

  • Ensure that your key fob is within range of the car.
  • Replace your key fob battery with a new and correctly-rated one.
  • Check the battery’s orientation to confirm that the positive side faces up.
  • Clean the battery contacts and ensure they are free of dirt or debris.

If the above tips fail to solve the problem, seek assistance from a technician or visit your local dealership.

Tips for Maintaining Your Key Fob and Ensuring Its Longevity

Now that you have successfully reset your Subaru key fob let’s discuss a few tips on maintaining your key fob and ensuring its longevity:

  • Use only a new and correct battery type when replacing your key fob battery.
  • Avoid exposing your key fob to extreme hot or cold temperatures.
  • Keep your key fob dry and avoid exposing it to water or moisture.
  • Handle your key fob with care and avoid dropping it. Dropping the key fob may damage its internal components.
  • Regularly clean and inspect your key fob for any wear and tear or other damage.
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Frequently Asked Questions

How long does a Subaru key fob battery last?

A Subaru key fob battery typically lasts between two to three years, depending on usage and environmental factors.

How much does it cost to replace a Subaru key fob battery?

A Subaru key fob battery replacement costs between $4 to $10, depending on the dealership or shop.

Can I replace my Subaru key fob battery myself?

Yes. You can replace your Subaru key fob battery yourself by following the steps outlined above.


By resetting your Subaru key fob with a battery change, you can ensure that your vehicle’s security system and ignition functions correctly. It’s a simple process that requires basic technical knowledge and a few tools. Remember to follow the instructions carefully and maintain your key fob for optimal performance.

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Billy Covington

With a passion for all things automotive, Billy is our go-to expert on Subaru performance upgrades and modifications. He's been featured in several car magazines and blogs, and his extensive knowledge and expertise make him a valuable member of our team. When he's not working on cars, he enjoys playing guitar and writing music.

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