When it comes to convenience, nothing beats the ease of a key fob, but even the best ones need a battery change eventually. Many Subaru owners might not realize how simple it is to tackle this task themselves. With just a few basic tools and a little guidance, they can save time and money by avoiding a trip to the dealership. This DIY guide will walk them through the entire process, from identifying the right battery to testing the key fob after the replacement. By the end, they’ll feel confident in their ability to keep their key fob functioning smoothly.

Subaru Key Fob Battery Quick Answer by Model

Most Subaru key fobs you will open for a battery swap use either a CR2032 or a CR2025 coin cell. The safest move is to open the fob first, confirm the old battery code, and then buy the replacement. Across the duplicate Subaru battery pages on WheelsGreed, the real differences were mostly model coverage and shell style, not a different core process.

Subaru model or fob style	Battery often seen	What to check before buying
Outback / Legacy	Usually CR2032	Look at the old battery because some slimmer fobs can use CR2025.
Forester / Crosstrek	Usually CR2032	Compare the shell shape and old cell size before ordering online.
Ascent and other newer smart keys	CR2032 or CR2025	Verify the battery number printed on the old coin cell instead of guessing by model year.
Any Subaru fob that looks different from yours	Varies	If the case design does not match this guide, confirm the battery in the owner’s manual or inside the fob.

What changes from one Subaru page to another

The repeat Subaru pages mostly covered the same steps with small wording changes. The useful takeaway is this: remove the emergency key, find the seam, pry the case open gently, swap in the same battery code with the same orientation, then test lock, unlock, and range before snapping the shell fully closed.

If the new battery still does not fix the fob

• Make sure the positive side of the new battery matches the old battery orientation.
• Check that the metal contacts are not bent down or blocked by dust.
• Confirm you bought the exact coin-cell size that came out of the fob.
• If the battery is too weak to start the vehicle, see our separate guide on starting a Subaru with a dead key fob.
• If you only need the battery code, use our quick reference on what size battery a Subaru key fob uses.

Related Changing Key Fob Guides

• Subaru key fob battery size chart
• How to open a Subaru key fob safely
• How to start a Subaru with a dead key fob
• How to program a Subaru key fob

Key Takeaways

Use the correct battery type (CR2032 or CR2025) for your Subaru key fob to ensure optimal performance.
Regularly inspect your key fob’s battery life and functionality to prevent lockout situations.
Follow a step-by-step process for battery replacement to avoid damaging the key fob.
Store the key fob in a temperature-controlled environment to extend its lifespan and maintain functionality.

Tools You’ll Need

The tools they’ll need include a small screwdriver and a new battery for the key fob. It’s essential to ensure the battery matches the specific model of the key fob. They might also want to have a pair of tweezers on hand, as these can help with handling small components. A clean, flat surface will make the process easier and prevent losing any tiny parts. It’s beneficial to have a small flashlight or a bright workspace, as visibility can be crucial when working with small electronics. If they’re prone to dropping things, using a magnetic tray could help keep screws secure. A soft cloth can also be useful for wiping down the key fob before reassembly. Sometimes, a plastic prying tool can assist in opening the key fob without damaging it. Lastly, having a manual or online guide can provide valuable references during the process.

Identifying the Right Battery

Identifying the right battery for a Subaru key fob can often be confusing for many owners. They might wonder which type of battery is compatible with their specific model. Typically, Subaru key fobs use batteries like CR2032 or CR2025. It’s crucial for owners to check their owner’s manual for precise specifications. Sometimes, the battery type is also printed on the back of the fob. If owners can’t find this information, they may need to consult a dealership or the manufacturer’s website. Using the wrong battery could result in malfunctioning or damage to the key fob. Many owners might also overlook the importance of purchasing a quality battery. Ultimately, ensuring the right battery is used can extend the lifespan of the key fob.

Step-by-Step Battery Replacement

A detailed guide outlines the step-by-step battery replacement process for a Subaru key fob. First, one should gather the necessary tools, including a small screwdriver and a replacement battery. Next, the key fob’s back cover needs to be carefully pried open. Once opened, the old battery’s position gets noted for proper placement of the new one. Then, the old battery’s removed, ensuring not to damage any internal components. After that, the new battery’s inserted, making sure the positive and negative sides align correctly. The back cover’s reattached, ensuring a snug fit. Finally, one should test the key fob to confirm that it functions properly. This process ensures the key fob operates seamlessly once again.

Opening the Key Fob

Opening the key fob requires a careful approach to avoid damaging the casing. It’s essential to gather the proper tools, such as a small flathead screwdriver. They’ll need to locate the seam where the two halves of the fob meet. Once found, they can gently insert the screwdriver into the seam. A slight twist should pop the casing open without excessive force.
Inside, they’ll find the battery compartment, often secured by a small clip. If they’re not cautious, it’s easy to break this clip during the process. After replacing the battery, closing the fob should be done carefully to ensure a tight fit. Finally, they should test the remote to confirm it works properly.

Removing the Old Battery

Once the key fob is opened, it’s time to focus on removing the old battery. It’s essential to identify the correct battery type before proceeding. With the right information in hand, they can efficiently open the key fob to access the battery compartment.

Identifying Battery Type

Understanding the battery type is crucial for ensuring the key fob functions properly. It’s often a small coin cell battery, but it can vary by model. Checking the user manual or looking online can provide the specific information needed. They should also note the battery’s voltage, as it’s important for compatibility. Once they’ve identified the correct battery type, they’ll be ready to proceed with the replacement.

Opening the Key Fob

The key fob’s design often includes small notches that make it easier for them to pry it open without causing damage. They should locate these notches before starting the process. Using a flat tool, they can gently insert it into one of the notches. Once they’ve created a slight gap, they can carefully slide the tool around the edges. This method ensures the fob opens smoothly, allowing access to the battery compartment.

Installing the New Battery

Installing the new battery requires aligning it properly within the key fob. He’s careful to ensure the positive side of the battery faces the correct direction. Once aligned, she gently presses the battery into place until it clicks. After securing the battery, they check that it’s seated firmly. Next, he reattaches the key fob casing, ensuring all clips fit snugly. She’s cautious not to apply too much pressure to avoid damaging the fob. After the casing is secure, he tests the key fob to confirm it’s working. If it doesn’t respond, she may need to reopen it and adjust the battery. With everything in place, he’s satisfied that the key fob is ready for use.

Reassembling the Key Fob

Reassembling the key fob can be a bit tricky, but he’s confident he can get it done. He’s carefully aligned the two halves of the fob, ensuring that all the components fit snugly. As he presses the halves together, he feels a satisfying click, signaling that they’re securely in place. He’s double-checked the orientation of the buttons, making sure they function properly.
Once he’s satisfied with the alignment, he grabs the tiny screws he set aside earlier. He’s using a small screwdriver to tighten them, ensuring the fob won’t accidentally open again. After securing the screws, he gives the fob a gentle shake to confirm everything’s intact. He knows it’s essential to test the buttons to ensure they’re responsive. Finally, he’s feeling a sense of accomplishment, knowing his key fob’s ready for use.

Testing Your Key Fob

Testing the key fob ensures that it’s functioning properly after the battery change. After reassembling the fob, one should press the lock button to see if the car responds. If the doors lock and unlock, it means the fob’s working correctly. However, if there’s no response, it might indicate a problem with the battery installation. Next, one can try the panic button to check for additional functions. If the panic alarm activates, the fob’s circuitry is likely intact. It’s also advisable to test the keyless entry feature from a distance. If the key fob still doesn’t function, one might need to inspect for any loose components. Ultimately, ensuring all functions operate smoothly is crucial for convenience.

Tips for Maintenance and Care

To ensure longevity and functionality, proper maintenance and care of the key fob is essential. It’s important to follow a few simple tips that’ll help keep it in top shape. By adhering to these practices, one can avoid unexpected issues and extend the key fob’s lifespan.

Regularly Inspect Battery Life

Regularly checking battery life helps ensure that the key fob remains functional and reliable. It’s advisable to look for signs of weak battery performance, such as decreased range or unresponsive buttons. If the fob’s performance diminishes, it’s best to replace the battery promptly. Users should also keep the key fob clean and free from debris that may affect its functionality. A proactive approach to battery maintenance can save time and prevent inconvenient lockouts.

Clean Key Fob Externally

Cleaning the key fob externally helps maintain its appearance and functionality. It’s advisable to use a soft cloth to gently wipe away dirt and grime. Regular cleaning prevents residue buildup that can interfere with buttons. Users should avoid harsh chemicals that could damage the fob’s surface. Keeping the key fob clean ensures it remains easy to use and visually appealing.

Store in Safe Location

A safe location for the key fob ensures it won’t get lost or damaged. It’s best to choose a specific spot for storage, like a drawer or a designated hook. When the fob’s stored consistently, it reduces the chances of misplacing it. Using a protective case can also help shield it from physical harm. Regularly checking the storage area keeps the key fob easy to find and ready for use.

Avoid Extreme Temperature Exposure

Exposure to extreme temperatures can damage the key fob’s internal components, so it’s best to keep it away from intense heat or cold. It’s advisable to store the fob in a temperature-controlled environment. Keeping it in a glove compartment during hot summer days isn’t recommended. Leaving it in a freezing car overnight can also lead to problems. Regularly checking the fob’s condition can help catch any issues early.

Frequently Asked Questions

How often should i replace the battery in my subaru key fob?

When it comes to replacing the battery in a Subaru key fob, it generally depends on usage. Most people find that they need to change it every one to two years, especially if they notice a decrease in range or responsiveness. Some might stretch it longer if they don’t use their fob frequently, but it’s always good to keep an eye on its performance. Regular checks can help ensure they won’t get locked out of their vehicle unexpectedly.

Can i use a different brand of battery for my subaru key fob?

It’s generally recommended to use the same brand of battery that originally came with the key fob to ensure optimal performance. While some people may choose to use a different brand, it might not provide the same reliability or longevity. Additionally, variations in quality can affect how well the key fob functions. Therefore, it’s best for them to stick with the manufacturer-recommended battery whenever possible.

What should i do if my key fob still doesn’t work after changing the battery?

If the key fob still doesn’t work after changing the battery, it’s best for them to check if the battery was installed correctly. They should also consider whether the key fob itself might be damaged or malfunctioning. Sometimes, reprogramming the key fob can resolve issues, so they might want to look into that option. If all else fails, consulting a professional or their vehicle’s manual could provide further guidance.

Conclusion

In summary, changing the battery in a Subaru key fob is a straightforward process that anyone can tackle with the right tools and guidance. By following the outlined steps, individuals can ensure their fob remains functional and responsive for years to come. Regular maintenance and proper storage are key to prolonging the life of the device, preventing unforeseen issues. It’s also wise to keep a spare battery handy, as this can save time and hassle during emergencies. Ultimately, taking these simple precautions leads to a more seamless experience with their vehicle’s keyless entry system.

If you’re interested in expanding your automotive knowledge beyond just your Subaru key fob, I highly recommend visiting this insightful page on how to say fiat in different languages. It’s a fun and educational exploration that will enhance your appreciation for cars around the world!