Is your 2021 Subaru key fob not working as reliably as it used to? Don’t worry, you’re not alone. One of the most common issues with key fobs is a dying battery. Fortunately, replacing the battery in your Subaru key fob, especially for models like the 2021, is a straightforward process you can easily do yourself. This guide will walk you through identifying the type of battery you need for your Subaru key fob and provide step-by-step instructions on how to replace it, ensuring you’re back on the road with a fully functional key fob in no time.
Whether you drive a recent model or an older Subaru, understanding your key fob is the first step. Subaru has utilized a few different key fob designs over the years. To ensure you use the correct battery and follow the right procedure, it’s helpful to know which type you have. If you’re unsure, your Subaru owner’s manual is the best resource to identify your specific key fob. Once you know your key fob type, you can easily determine the correct battery and follow the corresponding instructions below for a successful battery replacement.
Battery Replacement for Subaru Key Fob: Bulging Rectangle Shape (2032 Battery)
This type of key fob, often found in newer Subaru models including many 2021 vehicles, has a distinctive bulging rectangular shape. It utilizes a CR2032 battery. Here’s how to replace it:
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Remove the Emergency Key: Locate the small silver tab on the back of your key fob. Press and hold this tab to release and remove the metal emergency key.
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Open the Key Fob Casing: Carefully pry open the key fob. You can use a flathead screwdriver inserted into the seam between the two halves to gently separate them.
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Locate and Remove the Old Battery: Once opened, you’ll see the round, flat key fob battery. It might be positioned above or below the transmitter circuit board depending on how you opened it. Gently release the old battery from its housing.
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Insert the New 2032 Battery: Place the new CR2032 battery into the compartment, ensuring the correct side (usually marked with a “+” symbol) is facing upwards. Try to minimize touching the flat surfaces of the new battery with your fingers.
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Reassemble the Key Fob: Snap the two halves of the key fob casing back together until they are securely closed. Re-insert the metal emergency key until it clicks into place.
Battery Replacement for Subaru Key Fob: Teardrop Shape (2025 Battery)
If your Subaru key fob has an older, teardrop shape, the battery replacement process is very similar to the rectangular fob. However, this teardrop fob typically uses a CR2025 battery.
The steps are almost identical to the bulging rectangle shape, but remember:
- This older teardrop-shaped fob does not have a removable emergency key, so you can skip step 1 from the previous instructions.
- Ensure you are using a CR2025 battery instead of a CR2032.
Follow steps 2-5 from the “Bulging Rectangle Shape” instructions, substituting the CR2025 battery.
Battery Replacement for Subaru Key Fob: Exposed Metal Key with Buttons (CR1620 Battery)
The oldest style of Subaru electronic key fob features an exposed metal key that is always visible. This type requires a slightly different approach because it involves opening two casings to access the battery. This fob uses a CR1620 battery.
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Open the Exterior Casing: The process for opening the exterior casing is the same as described for the bulging rectangle fob (steps 1 and 2). Remove the emergency key and pry open the main casing.
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Open the Interior Casing: Inside the exterior casing, you will find a second, smaller casing. This inner casing has small tabs that you need to press to open it. Carefully locate and press these tabs to separate the two halves of the interior casing.
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Replace the CR1620 Battery: Once the interior casing is open, you can access the battery. Remove the old CR1620 battery and replace it with a new one, again ensuring the correct side is facing up.
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Reassemble Both Casings: Close the interior casing first, making sure it snaps together securely. Then, place the interior casing back into the exterior casing and snap the main casing closed.
What if a New Battery Doesn’t Solve the Problem?
If you’ve replaced your Subaru key fob battery and it’s still not working, the issue might be more complex. In some cases, especially with newer Subaru models, the key fob may need to be reprogrammed.
For newer Subaru models, programming often requires specialized equipment and is best handled by a dealership like Subaru North Orlando. They have the tools and expertise to program your key fob correctly.
However, for older Subaru models, there is a possibility to program the key fob yourself at home. The process involves a sequence of steps including opening the key fob to locate an 8-digit code, and then performing a series of door lock and ignition actions in a specific timeframe.
Self-Programming (For Older Models – Consult Owner’s Manual):
While specific steps can vary and it’s crucial to consult your owner’s manual for your exact model, a general outline for older models is as follows:
- Open your key fob to reveal the circuit board and locate the 8-digit code.
- Sit in the driver’s seat with all doors and windows closed.
- Follow a sequence of turning the ignition to accessory mode and back off multiple times, combined with opening and closing the driver’s side door.
- Enter the 8-digit code using the lock and unlock buttons in a timed sequence.
Important Note: Programming procedures can be intricate and may not always be successful at home. If you encounter difficulties or drive a newer Subaru model, it is highly recommended to contact your Subaru dealership for professional key fob programming or replacement services.
Rely on Expert Service if Needed
Replacing your Subaru key fob battery is usually a simple fix. By identifying your key fob type and following these steps, you can often resolve the issue quickly and get your key fob working again. However, if you’re uncomfortable with DIY battery replacement or if programming becomes necessary, Subaru North Orlando or your local Subaru dealership are ready to assist. They can handle battery replacements, key fob programming, and even provide new key fobs if needed. Consider checking their service specials for potential cost savings on your visit.
