Is your 2021 Subaru Forester key fob refusing to cooperate? Don’t worry, you’re likely just dealing with a dead battery. It’s a common issue, and thankfully, replacing the battery for your 2021 Subaru Forester key fob is a straightforward task you can easily handle yourself. Feeling locked out or unable to start your Subaru can be frustrating, but this guide will walk you through each step to get your key fob back in action quickly.
While you can always schedule a service appointment, replacing the battery for a 2021 Subaru Forester key fob is often a faster and more convenient DIY solution. Let’s dive into how you can do it yourself.
Identifying Your 2021 Subaru Forester Key Fob and Battery Type
For the 2021 Subaru Forester, you’ll primarily encounter the bulging rectangle-shaped key fob. This modern design is user-friendly and relatively easy to open for a battery replacement. Although Subaru has used different key fobs over the years, understanding the type relevant to your 2021 Forester is the first step.
This image shows the typical rectangular key fob used for models like the 2021 Subaru Forester. Recognizing this fob type is the first step in replacing your key fob battery.
The battery for the 2021 Subaru Forester key fob, specifically the rectangular one, is a CR2032 battery. This is a widely available and inexpensive coin-cell battery that you can find at most drugstores, supermarkets, and online retailers. Make sure to have a fresh CR2032 battery ready before you begin the replacement process.
While older Subaru models used teardrop-shaped fobs (requiring a 2025 battery) and fobs with exposed metal keys (using a CR1620 battery), these are less likely to be relevant for your 2021 Forester. However, for comprehensive information, we will briefly cover those types as well.
Step-by-Step Guide: Replacing the Battery in Your 2021 Subaru Forester Rectangular Key Fob (CR2032 Battery)
Let’s get your 2021 Subaru Forester key fob working again! Follow these simple steps to replace the battery for your 2021 Subaru Forester key fob:
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Remove the Emergency Key: Locate the small silver tab on the back of your rectangular key fob. Press and hold this tab to release and remove the metal emergency key. This key is a backup to manually unlock your car door if the electronic functions are not working.
This image illustrates how to detach the emergency key from the rectangular Subaru key fob. This is the first step in accessing the battery compartment.
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Pry Open the Key Fob: Carefully inspect the seam running around the key fob. This is where you’ll need to gently pry it open. You can use a flathead screwdriver or a similar thin, flat tool. Insert the tool into the seam and gently twist to separate the two halves of the fob. Be patient and avoid using excessive force to prevent damage to the casing.
This image demonstrates using a flathead screwdriver to carefully pry open the Subaru key fob casing along its seam to access the battery.
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Locate the Old Battery: Once open, you’ll see the internal components of the key fob. The flat, round CR2032 battery for your 2021 Subaru Forester key fob will be visible, possibly above or below a transmitter circuit board depending on how you opened it.
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Remove and Replace the Battery: Gently release the old battery. You might be able to pry it out with your fingertip or the same flat tool used to open the fob. Take note of the battery’s orientation – the positive (+) side should be facing upwards. Install the new CR2032 battery, ensuring the positive (+) side is facing the correct direction. Minimize touching the flat surfaces of the new battery with your fingers; handling it by the edges is recommended to maintain optimal performance.
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Reassemble the Key Fob: Carefully align the two halves of the key fob and press them firmly back together until they snap securely. Ensure there are no gaps and the fob feels solid.
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Re-insert the Emergency Key: Slide the metal emergency key back into its slot until it clicks into place.
Your battery for the 2021 Subaru Forester key fob is now replaced! Test the key fob to ensure it is working correctly by locking and unlocking your car doors remotely.
Battery Replacement for Other Subaru Key Fob Types (For Informational Purposes)
While less relevant to a 2021 Subaru Forester, here’s a quick look at replacing batteries in other Subaru key fob styles:
Teardrop Shape Key Fob (2025 Battery)
This older, teardrop-shaped fob is similar to the rectangular one but uses a 2025 battery. The process is nearly identical, skipping the emergency key removal step as this fob doesn’t have one. Pry it open, replace the 2025 battery, and reassemble.
Exposed Metal Key with Buttons Key Fob (CR1620 Battery)
This older style features a visible metal key. Replacing the CR1620 battery in this fob involves opening the outer casing (similar to the rectangular fob). However, you’ll find a second, smaller inner casing. You need to open both casings to access and replace the CR1620 battery. Press the small tabs on the inner casing to open it.
Troubleshooting: What if a New Battery Doesn’t Solve the Problem?
If you’ve replaced the battery for your 2021 Subaru Forester key fob and it’s still not working, there are a few possibilities:
- Incorrect Battery Installation: Double-check that the CR2032 battery is installed with the positive (+) side facing up.
- Battery Quality: Ensure you are using a fresh, high-quality CR2032 battery from a reputable brand.
- Key Fob Programming Issues: In rare cases, battery replacement can sometimes cause the key fob to lose its programming, especially in older models.
For newer Subaru models like the 2021 Forester, reprogramming after a simple battery change is unlikely to be necessary. However, if you suspect a programming issue or if battery replacement doesn’t resolve the problem, it’s best to seek professional assistance.
When to Seek Professional Help from Keyfobprog.com
While replacing the battery for a 2021 Subaru Forester key fob is usually a simple DIY task, Keyfobprog.com is here to help if you encounter any difficulties or prefer professional service.
- Programming a New Key Fob: If your key fob is damaged or needs replacement beyond just the battery, you’ll likely need a new fob programmed to your vehicle. Keyfobprog.com can assist with obtaining and programming a new Subaru key fob.
- Persistent Key Fob Issues: If you’ve replaced the battery and your key fob still isn’t functioning correctly, there might be a more complex issue. Our expert technicians at Keyfobprog.com can diagnose and resolve any underlying problems with your key fob or vehicle’s remote entry system.
Contact Keyfobprog.com today for any of your Subaru key fob needs. We offer expert service and reliable solutions to keep you on the road.
Replacing the battery for your 2021 Subaru Forester key fob is a simple maintenance task that can save you time and hassle. By following these steps, you can quickly restore your key fob’s functionality and regain convenient access to your Subaru Forester. Remember keyfobprog.com is your trusted resource for all things key fob related, should you need further assistance.
