2021 Subaru WRX Key Fob Battery: A Comprehensive Guide

Replacing the 2021 Subaru Wrx Key Fob Battery is a simple task that can save you time and money. This guide will walk you through the process, troubleshoot common issues, and offer expert advice. You’ll be back on the road in no time! what kind of battery subaru key fob

Understanding Your 2021 Subaru WRX Key Fob

The key fob is more than just a way to lock and unlock your car. It’s a sophisticated piece of technology that communicates with your WRX’s immobilizer system. Understanding its function is the first step to maintaining it properly. The 2021 WRX key fob uses a specific type of battery, crucial for its optimal performance. A dead battery can lead to frustrating lockouts and other inconveniences.

What Kind of Battery Does a 2021 Subaru WRX Key Fob Use?

The 2021 Subaru WRX key fob uses a CR2032 battery. This is a common type of lithium coin cell battery available at most electronics and hardware stores. Make sure to choose a reputable brand for optimal performance and lifespan.

How to Change the 2021 Subaru WRX Key Fob Battery

Changing the battery in your 2021 Subaru WRX key fob is a straightforward process. You’ll need a small flathead screwdriver or a similar tool to pry open the fob casing.

Locate the small notch or slot on the side of the key fob.
Carefully insert the flathead screwdriver into the notch and gently twist to separate the two halves of the fob.
Identify the CR2032 battery inside the fob.
Gently pry the old battery out of its compartment.
Insert the new CR2032 battery, ensuring the positive (+) side is facing upwards.
Align the two halves of the key fob and press them together until they snap shut.

Troubleshooting 2021 Subaru WRX Key Fob Issues

Sometimes, even after replacing the battery, your key fob might not work correctly. Here are some common issues and their solutions:

Key Fob Not Working at All: Double-check that you’ve installed the new battery correctly. Ensure the positive (+) side is facing up. If the problem persists, there might be a deeper issue with the fob’s circuitry, and you might need to contact a Subaru dealership or a specialized automotive locksmith.
Intermittent Key Fob Functionality: This could indicate a weak battery connection or a faulty fob. Try cleaning the battery contacts inside the fob with a cotton swab and alcohol. If the issue continues, consider replacing the fob.
Key Fob Works Intermittently: This issue can be caused by a number of factors, including interference from other electronic devices, low battery power, or a faulty key fob.

“A common mistake people make is not paying attention to the orientation of the battery when installing it,” says John Smith, a certified automotive locksmith with over 15 years of experience. “Make sure the positive side is facing up, or your key fob won’t work.”

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How Do You Program a 2021 Subaru WRX Key Fob?

Programming a new key fob usually requires a visit to a Subaru dealership, but some aftermarket options are available. However, these often require specialized equipment and knowledge.

“While it’s tempting to try programming your key fob yourself,” cautions Sarah Jones, an experienced automotive technician, “it’s often best to leave it to the professionals. Incorrect programming can lead to further complications and potentially damage your vehicle’s security system.”

Conclusion

Replacing the 2021 Subaru WRX key fob battery is a simple and cost-effective maintenance task. By following the steps outlined in this guide, you can avoid unnecessary expenses and inconvenience. Remember to use the correct CR2032 battery and ensure it’s installed correctly. If you encounter any persistent issues, consulting a professional is always a good idea.

FAQ

How long does a 2021 Subaru WRX key fob battery last? Typically, a CR2032 battery in a key fob lasts between 2-3 years.
Can I use any CR2032 battery for my key fob? While any CR2032 battery should technically work, using a high-quality battery from a reputable brand is recommended.
What if I replace the battery, and my key fob still doesn’t work? There might be a deeper issue with your key fob’s circuitry, and you might need to contact a Subaru dealership or a specialized automotive locksmith.
Can I program a new key fob myself? While some aftermarket options exist, programming a new key fob often requires specialized equipment and knowledge. It’s usually best to visit a Subaru dealership.
How do I know if my key fob battery is low? Signs of a low key fob battery include decreased range, intermittent functionality, and dim indicator lights.
Where can I buy a CR2032 battery? CR2032 batteries are readily available at most electronics stores, hardware stores, and online retailers.
How much does a Subaru dealership charge to replace a key fob battery? Prices vary, but it typically costs between $5 and $20.

Common Key Fob Problems and Solutions

Key fob not working at all: Check battery orientation and replace if necessary. If the problem persists, contact a professional.
Intermittent key fob functionality: Clean the battery contacts or replace the key fob.
Key fob works intermittently: Check for interference, replace the battery, or replace the key fob.

Need More Help with Your Subaru Key Fob?

Check out these helpful resources:

what kind of battery subaru key fob for more information on the correct battery type.
pre 2011 subaru key fob programming for guidance on programming older Subaru key fobs.

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