How to Change Battery in 2021 Subaru Key Fob

Changing the battery in your 2021 Subaru key fob is a quick and easy process that can save you the hassle and expense of a dealership visit. This guide will walk you through the steps, offering helpful tips and answering common questions to ensure a smooth battery replacement.

Understanding Your 2021 Subaru Key Fob

Before diving into the battery replacement process, it’s helpful to understand the different types of key fobs Subaru uses. The 2021 models generally utilize either a traditional flip key or a smart key fob. Recognizing which type you have is crucial for selecting the correct battery and following the appropriate replacement procedure. Both types generally use a CR2032 battery, a common type readily available at most stores.

Gathering Your Supplies

You’ll need just a few items: a new CR2032 battery, a small flathead screwdriver or a similar prying tool (a key or a thin dime can sometimes work in a pinch), and optionally, a small container to hold the tiny screws. Having these items ready beforehand streamlines the process.

Steps to Change the Battery in a 2021 Subaru Flip Key Fob

Locate the small release button: On the side of your key fob, you’ll find a small button or switch. Press this button to release the emergency key blade.
Separate the key fob halves: Using the key blade or your flathead screwdriver, gently pry open the key fob casing along the seam where the two halves meet. Be careful not to apply excessive force, as this could damage the plastic.
Identify the battery: Inside, you’ll see the CR2032 battery. Note its orientation.
Remove the old battery: Gently pry the old battery out using your flathead screwdriver. Avoid puncturing the battery.
Insert the new battery: Place the new CR2032 battery into the compartment, ensuring it matches the orientation of the old battery.
Reassemble the key fob: Snap the two halves of the key fob back together. Ensure they click securely into place.
Test the key fob: Try locking and unlocking your car to confirm the new battery is working correctly.

Steps to Change the Battery in a 2021 Subaru Smart Key Fob

While similar to the flip key process, the smart key fob might have slight variations. Consult your owner’s manual for model-specific instructions. Generally, the process involves locating a small slot or button to release the emergency key, which then allows access to the battery compartment.

Locate the release button or slot: This is usually located on the side or back of the fob.
Remove the emergency key: Use the release mechanism to slide out the key.
Pry open the fob: Use the key or a flathead screwdriver to gently pry open the fob at the designated seam.
Replace the battery: Remove the old CR2032 battery and insert the new one, matching the correct polarity.
Reassemble and test: Snap the fob back together and test the functionality.

Replacing the Battery in a 2021 Subaru Smart Key Fob – Step-by-Step Guide with Images

Troubleshooting Tips

If your key fob still doesn’t work after replacing the battery, consider these possibilities:

Incorrect battery installation: Double-check the battery orientation.
Key fob programming: In rare cases, you may need to reprogram your key fob. Consult your owner’s manual or contact a Subaru dealership.
Faulty key fob: If the key fob itself is damaged, it may need to be replaced.

Conclusion

Changing the battery in your 2021 Subaru key fob is a simple DIY task that can be completed in just a few minutes. By following these instructions and having the right tools, you can save time and money. Remember to always refer to your owner’s manual for model-specific details.

FAQs

What type of battery does a 2021 Subaru key fob use? A CR2032 battery.
How often should I change the key fob battery? Typically every 2-3 years, or when you notice reduced range.
Can I damage my key fob by changing the battery myself? It’s possible if excessive force is used. Be gentle when prying open the casing.
What if my key fob still doesn’t work after changing the battery? Double-check the battery orientation, consult your owner’s manual for programming instructions, or contact a Subaru dealership.
Where can I buy a CR2032 battery? Most electronics stores, pharmacies, and online retailers carry CR2032 batteries.
Do I need any special tools? A small flathead screwdriver or a similar prying tool is recommended.
Is it cheaper to change the battery myself or go to a dealership? Changing it yourself is significantly cheaper.

Common Key Fob Battery Issues

Some common issues include a key fob that intermittently works, reduced range, or no response at all. These are typically indicative of a low battery.

Further Resources

Check out our articles on Key Fob programming and other Subaru maintenance tips.

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