How to Replace Battery in Subaru Keyless Fob: Step-by-Step Guide

Ever found yourself locked out of your car at the worst possible moment, all because of a tiny battery? Frustrating, right? Well, worry no more! Today, we’re diving into the world of Subaru keyless fobs and the simple steps you can take to replace their batteries.

Imagine being able to effortlessly unlock your car with just a click of a button, without any battery hiccups. With this quick guide, you’ll not only save time and money but also regain that peace of mind knowing your key fob is always ready to go.

Ready to bid farewell to those last-minute panics and endless searches for spare batteries? Stick around, as we walk you through the easy process of replacing the battery in your Subaru keyless fob.

Understanding Subaru Keyless Fobs

When it comes to your Subaru keyless fob, understanding how it works is essential for a seamless user experience. Here’s a breakdown of the key points:

  • Battery Function: Your keyless fob relies on a small battery to transmit signals to your Subaru’s locking system.
  • Signal Transmission: The fob sends signals with a unique code that matches your car’s system, allowing for secure access.
  • Proximity Sensors: Many keyless fobs operate via proximity sensors, enabling you to unlock or lock your car with just a touch.

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With this foundation in mind, you’ll have a better grasp of how the Subaru keyless fob operates, setting the stage for an effortless battery replacement process.

Signs of a Low Battery

  • Keyless entry system not responding when you press the buttons
  • Reduced signal range for locking and unlocking your car
  • Intermittent functionality of the key fob

Tools Needed for Battery Replacement

To replace the battery in your Subaru keyless fob, you will need a few essential tools. Here’s what you’ll need to get started:

  • Replacement Battery: Make sure you have a compatible battery for your Subaru keyless fob. Refer to your vehicle’s manual for the correct battery type.
  • Small Flathead Screwdriver: This will come in handy for safely opening the keyless fob casing without causing any damage.
  • Tweezers: Useful for handling the small components inside the fob with ease and precision.
  • Clean Cloth: Having a clean cloth nearby can help you keep the keyless fob components free from dirt and debris during the replacement process.
  • Patience and Care: While not a physical tool, these qualities are equally important. Take your time and handle the components carefully to avoid any mishaps.

Remember, having the right tools for the job can make the battery replacement process smoother and more efficient. So, gather these tools before you begin replacing the battery in your Subaru keyless fob.

Step-by-Step Guide to Replace the Battery

Replacing the battery in your Subaru keyless fob is a straightforward process that you can easily do yourself. Here’s a simple guide to help you through it:

  • Replacement battery compatible with your keyless fob
  • Small flathead screwdriver for opening the casing
  • Tweezers for handling components
  • Clean cloth to prevent debris

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2. Opening the Fob:
Use the small flathead screwdriver to carefully pry open the casing of the keyless fob. Be gentle to avoid damaging the fob.

3. Removing the Old Battery:
Once the casing is open, use the tweezers to remove the old battery from its slot. Ensure you note the position of the battery for correct placement of the new one.

4. Inserting the New Battery:
Take the replacement battery and insert it into the slot, following the orientation of the old battery. Make sure it fits snugly in place.

5. Closing the Fob:
Carefully align the casing of the keyless fob and press it firmly until it snaps back into place. Ensure it is secure to prevent any issues with the fob’s functionality.

6. Testing the Fob:
Test the keyless fob to ensure that the new battery is working correctly. Check if the buttons respond as they should.

7. Final Checks:
Once everything is in place, give the keyless fob a final check to guarantee that the battery replacement was successful.

By following these simple steps, you can replace the battery in your Subaru keyless fob with ease and ensure it continues to function smoothly.


That’s it! You now know how to replace the battery in your Subaru keyless fob like a pro. Remember to use the right tools and follow the steps carefully for a hassle-free experience. With a new battery in place, your keyless fob will be ready to go, keeping you on the move without any interruptions. Happy driving!

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Frequently Asked Questions

Q: What tools do I need to replace the battery in a Subaru keyless fob?

A: You will need a replacement battery, small flathead screwdriver, tweezers, and a clean cloth.

Q: How do I open the Subaru keyless fob?

A: Use the small flathead screwdriver to gently pry open the keyless fob.

Q: How do I remove the old battery from the Subaru keyless fob?

A: Use tweezers to carefully take out the old battery from its compartment.

Q: How do I insert the new battery correctly?

A: Place the new battery in the compartment with the correct polarity (+ and -).

Q: How do I securely close the Subaru keyless fob after replacing the battery?

A: Press the two halves of the fob together firmly until they click into place.

Q: What should I do to test the functionality of the keyless fob after battery replacement?

A: Test that the keyless entry and other functions work properly.

Q: Are there any final checks I should perform after replacing the battery in the keyless fob?

A: Ensure the fob is functioning correctly and the buttons respond as intended.

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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