DIY Guide: How to Change Subaru Crosstrek Key Fob Battery in 5 Easy Steps

If you are a Subaru Crosstrek owner and suddenly find your key fob remote not working properly or not responding to your commands, you may need to replace the battery. A key fob battery replacement is a simple and straightforward process that you can do yourself with some basic tools. In this DIY guide, we will show you how to change the Subaru Crosstrek key fob battery in 5 easy steps.


This article is aimed at Subaru Crosstrek owners who wish to take care of minor car maintenance issues themselves. The audience will have some basic knowledge of car maintenance but may not be confident in changing the key fob battery.

When to Replace Your Key Fob Battery

The battery life of a key fob remote varies from one brand to another, and it’s not uncommon for key fob batteries to last up to three years before needing a replacement. However, if your key fob has been giving you trouble or shows signs of weakness, such as reduced range, slow response, or dim lights, it’s time to replace the battery.

Tools Required

To change the battery in your Subaru Crosstrek key fob, you will need the following tools:

  • A small flathead screwdriver
  • A fresh battery (CR2032)

Step-by-Step Guide

Follow these simple steps to replace the battery in your Subaru Crosstrek key fob:

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Step 1: Open the Key Fob

Take the small flathead screwdriver and locate the tiny notch or slot on the edge of the key fob. Insert the screwdriver into the notch and twist it gently until the cover pops open. Be careful not to use too much force as this could damage the key fob.

Step 2: Remove the Old Battery

Once you have opened the key fob, locate the old battery and gently remove it using the flathead screwdriver. Be careful not to touch the circuit board or any other components inside the key fob.

Step 3: Insert the New Battery

Take the new CR2032 battery and insert it into the battery compartment with the positive (+) side facing up. Make sure the battery is securely in place and does not move around.

Step 4: Reassemble the Key Fob

With the new battery in place, gently press the cover back onto the key fob until it snaps into place. Ensure that both halves of the key fob are aligned correctly and that there are no gaps or misalignments.

Step 5: Test the Key Fob

Once you have reassembled the key fob, press the buttons to ensure that the key fob is working correctly. If your key fob has a panic button, you may need to hold it down for a few seconds to activate it.

Congratulations! You have now successfully changed the battery in your Subaru Crosstrek key fob. With this simple DIY guide, you have saved yourself a lot of time and money by not having to visit a mechanic.

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Q: What if I replace the battery and the key fob does not work?

A: If the key fob does not work after replacing the battery, there could be other issues with the key fob. You may need to take it to a Subaru dealer or a certified mechanic for further inspection.

Q: How do I know which battery to use with my key fob?

A: The recommended battery for the Subaru Crosstrek key fob is a CR2032 battery. You can check your key fob manual or the old battery for the exact battery type.


Changing the battery in your Subaru Crosstrek key fob is a simple process that can save you time and money. By following the easy steps above, you can replace the battery yourself and get your key fob back to working condition. Don’t let a dead key fob hold you back from enjoying your Subaru Crosstrek!

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Joseph Weaver

With a background in engineering and a passion for cars, Joseph brings a unique perspective to our blog. He's particularly interested in the technology and innovation behind Subaru's advanced safety features, and his articles on this topic are always insightful and informative. When he's not writing, he enjoys playing video games and spending time with his family.

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