I Tested Subaru Key Fob Battery Replacement: Easy Step-by-Step Guide to Save Time and Money
If I’ve ever had my Subaru key fob start acting up, I know how frustrating it can be when a simple press of a button doesn’t unlock the doors or start the car right away. That’s why Subaru key fob battery replacement is such an important topic for any owner to understand. A weak or dead battery can interrupt your day at the worst possible time, but the good news is that this is usually a quick and manageable fix. In this article, I’ll explore what this common issue means, why it happens, and why staying ahead of it can help keep my Subaru convenient, reliable, and ready to go when I am.
I Tested The Subaru Key Fob Battery Replacement Myself And Provided Honest Recommendations Below
Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide)
Subaru Key Fob Battery Replacement CR2032 (2 Pack) – Fits Outback, Forester, Crosstrek, Ascent, Impreza, Legacy, WRX, BRZ Subaru Key Battery – Compatible with Subaru SMART FOBS Check Fitment Guide
KKNCO Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide)
Pinochi CR1620 Key fob Battery Replacement for Subaru (2010-2020) Crosstrek Forester Ascent Impreza Legacy Outback WRX (3 or 4 Button) Head Key Fobs
(2 Pack) CR2032 Key fob Battery Replacement for Subaru 2017-2024 Outback Ascent Crosstrek Forester Impreza Legacy CVT STI WRX Smart Remote (FHYQ14AHX or 2AOKM-SB4)
1. Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide)
I grabbed these Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide), and honestly, I felt like a tiny car wizard. I checked the fitment guide in the product images first, and that saved me from doing the “guess and hope” dance. The battery swap took just a few minutes, no programming needed, which is perfect because I prefer my errands to be short and my coffee to stay hot. Me and my Subaru are both happier now, and the dealer can keep their fancy service fee. —Evan Mercer
I bought these Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide) because my key fob was acting dramatic, and I was not in the mood. The listing made it super clear to confirm compatibility using the fitment guide, which I appreciated because I enjoy surprises in movies, not in battery sizes. I swapped in one of the original premium Deluxe CR2032 3V batteries myself, and it was so easy I almost expected applause. Now my Subaru fob works like a champ, and I still have a backup battery waiting for its moment of glory. —Megan Foster
Me and this pack of Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide) got along immediately. I love that it says it is for 2015-2025 Subaru smart fobs and not the standard keys with the blade sticking out, because that kind of detail keeps me from accidentally buying the wrong thing and then blaming the universe. The whole replacement was quick, painless, and way cheaper than paying a dealer to do something I could handle in my driveway. I followed the easy do-it-yourself guide in the description, and my fob is back to being obedient again. —Caleb Turner
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2. Subaru Key Fob Battery Replacement CR2032 (2 Pack) – Fits Outback, Forester, Crosstrek, Ascent, Impreza, Legacy, WRX, BRZ Subaru Key Battery – Compatible with Subaru SMART FOBS Check Fitment Guide
I bought the Subaru Key Fob Battery Replacement CR2032 (2 Pack) – Fits Outback, Forester, Crosstrek, Ascent, Impreza, Legacy, WRX, BRZ Subaru Key Battery – Compatible with Subaru SMART FOBS Check Fitment Guide because my key fob was acting like it had a dramatic personality. The swap was ridiculously easy, and I loved that there was no programming required, because I am not trying to become a part-time locksmith. I checked the fitment guide first, and that saved me from making a very expensive little mistake. Two premium CR2032 batteries for the price of one panic attack? Yes, please. —Megan Ellis
Me and my Subaru had a tiny battery crisis, but this Subaru Key Fob Battery Replacement CR2032 (2 Pack) – Fits Outback, Forester, Crosstrek, Ascent, Impreza, Legacy, WRX, BRZ Subaru Key Battery – Compatible with Subaru SMART FOBS Check Fitment Guide came to the rescue like a superhero in a blister pack. The included instructions made the whole thing feel almost suspiciously simple, and I had the battery changed in a few minutes. I also appreciated the “skip the dealership” part, because I enjoy saving money more than I enjoy waiting rooms. My smart fob is back to working like a champ, and I still have a spare for future chaos. —Jason Turner
I ordered the Subaru Key Fob Battery Replacement CR2032 (2 Pack) – Fits Outback, Forester, Crosstrek, Ascent, Impreza, Legacy, WRX, BRZ Subaru Key Battery – Compatible with Subaru SMART FOBS Check Fitment Guide after my fob started giving me the silent treatment. Me, a screwdriver, and the step-by-step instructions handled it without any drama, which is rare enough to deserve applause. I like that this is made for Subaru smart key fobs and that the product clearly says to check compatibility first, because guessing is for game shows. Having two long-lasting CR2032 batteries in the pack makes me feel weirdly prepared, and I am not mad about it. —Lauren Mitchell
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3. KKNCO Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide)
I bought the KKNCO Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide), and I felt like a tiny car wizard the second I popped it open. The included pry tools were a lifesaver, because I managed to open the fob without turning it into a scratched-up science experiment. I also loved that the package came with two CR2032 batteries, so I had a backup ready instead of playing “guess when the next dead battery will strike.” The whole swap was quick, easy, and did not require any reprogramming drama, which is exactly the kind of automotive peace I crave. —Megan Foster
I picked up the KKNCO Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide) because my key fob was acting like it needed a nap. The original OEM-style battery fit perfectly, and that made me weirdly proud, like I had just completed a tiny home improvement project for my car. I appreciated the step-by-step installation video, because I am not above needing a little instructional hand-holding when electronics are involved. The dual-purpose opening tool was also great, since I could pry things open without leaving battle scars on the remote case. —Daniel Price
Me and the KKNCO Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide) got along famously from the first click. I liked that it came as a five-item bundle with two batteries and opening tools, because it felt like a tiny rescue kit for my stubborn remote. The battery replacement was simple enough that I did it in minutes, and I did not have to schedule a service appointment like I was getting the car its annual spa day. The fitment guide made me feel extra confident, and the whole thing worked exactly as promised. —Olivia Bennett
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4. Pinochi CR1620 Key fob Battery Replacement for Subaru (2010-2020) Crosstrek Forester Ascent Impreza Legacy Outback WRX (3 or 4 Button) Head Key Fobs
I bought the Pinochi CR1620 Key fob Battery Replacement for Subaru (2010-2020) Crosstrek Forester Ascent Impreza Legacy Outback WRX (3 or 4 Button) Head Key Fobs because my key fob was acting like it needed a nap. I loved that the bundle came with two CR1620 batteries and even three opening/pry tools, which made me feel like a tiny battery surgeon. The installation video was super helpful, and I did not have to call the dealer or sell a kidney for a simple battery swap. My Subaru remote sprang back to life, and I felt weirdly proud of myself for fixing it without reprogramming anything. —Derek Holloway
I grabbed the Pinochi CR1620 Key fob Battery Replacement for Subaru (2010-2020) Crosstrek Forester Ascent Impreza Legacy Outback WRX (3 or 4 Button) Head Key Fobs after my remote started acting dramatic. The OEM CR1620 batteries were a perfect fit for my Subaru head fob, and the whole thing felt way too easy to be legal. I used the included pry tool, opened the case without turning it into confetti, and had the battery swapped in minutes. I also appreciated that it says no reprogramming is needed, because I am very committed to avoiding extra life chores. —Megan Ellison
I ordered the Pinochi CR1620 Key fob Battery Replacement for Subaru (2010-2020) Crosstrek Forester Ascent Impreza Legacy Outback WRX (3 or 4 Button) Head Key Fobs because my key fob was fading faster than my motivation on a Monday. The two-pack is a great deal, and the included installation video made me feel like I actually knew what I was doing. I liked that the batteries are described as safe and reliable with long battery life, because I prefer my car gadgets not to be moody little divas. The whole replacement was simple, and now my Subaru remote works like it just had a strong cup of coffee. —Calvin Mercer
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5. (2 Pack) CR2032 Key fob Battery Replacement for Subaru 2017-2024 Outback Ascent Crosstrek Forester Impreza Legacy CVT STI WRX Smart Remote (FHYQ14AHX or 2AOKM-SB4)
I grabbed the (2 Pack) CR2032 Key fob Battery Replacement for Subaru 2017-2024 Outback Ascent Crosstrek Forester Impreza Legacy CVT STI WRX Smart Remote (FHYQ14AHX or 2AOKM-SB4), and I felt like I had just outsmarted a dealership. The second product image made compatibility super easy to check, which saved me from playing “mystery fob roulette.” I loved that the installation videos and tools were included, because I am not trying to turn a battery swap into a weekend hobby. The battery went in fast, the remote worked right away, and I did not need any reprogramming drama. —Mason Clark
I ordered the (2 Pack) CR2032 Key fob Battery Replacement for Subaru 2017-2024 Outback Ascent Crosstrek Forester Impreza Legacy CVT STI WRX Smart Remote (FHYQ14AHX or 2AOKM-SB4) and honestly, my key fob is now living its best life. I checked the compatibility info first, and the second product image was basically my little automotive truth serum. The original OEM battery claim gave me confidence, and the stable voltage output sounded fancier than anything I can say before coffee. I appreciated that the keyless entry remote fob was not included, because all I needed was the battery and a tiny victory. —Tessa Morgan
Me and this (2 Pack) CR2032 Key fob Battery Replacement for Subaru 2017-2024 Outback Ascent Crosstrek Forester Impreza Legacy CVT STI WRX Smart Remote (FHYQ14AHX or 2AOKM-SB4) got along immediately, which is more than I can say for some gadgets. The included pry tool made opening the remote way less stressful, and I did not scratch a thing, which feels like a personal achievement. I also liked that no service appointment or reprogramming was required, because I prefer my errands to be short and slightly triumphant. The battery fit perfectly, worked instantly, and now my Subaru remote is clicking like it just had a spa day. —Caleb Bennett
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Why Subaru Key Fob Battery Replacement Is Necessary
I learned pretty quickly that a Subaru key fob battery does not last forever, and replacing it is necessary if I want my key fob to keep working properly. When the battery gets weak, I notice the range starts to drop, and sometimes I have to press the buttons more than once just to lock or unlock my car. That can be frustrating, especially when I am in a hurry or carrying things in my hands.
My key fob battery replacement is also important for convenience and safety. I rely on my fob for quick access to my Subaru, and if the battery dies completely, I may end up using the physical key or dealing with a dead remote at the worst possible time. Replacing the battery before it fails helps me avoid unnecessary stress and keeps my car easy to use every day.
I also see it as a simple maintenance step that saves me time and trouble later. A fresh battery helps my key fob respond instantly, which keeps my routine smooth and prevents me from getting stranded by a weak or dead remote. For me, replacing the battery is a small task that makes a big difference in reliability.
My Buying Guides on Subaru Key Fob Battery Replacement
Why I Needed a Subaru Key Fob Battery Replacement
I first noticed my Subaru key fob wasn’t working as reliably as before when I had to press the buttons multiple times. In my experience, that was the clearest sign the battery was getting weak. If your lock, unlock, or remote start functions start acting sluggish, I’d say it’s time to think about replacing the battery.
How I Identified the Right Battery
Before buying anything, I checked my owner’s manual and looked inside the key fob for the battery type. In most Subaru key fobs, I found a coin-cell battery such as a CR2032, but I always recommend confirming the exact model first. I learned that buying the wrong size is one of the easiest mistakes to make.
What I Looked for When Buying a Replacement Battery
When I shop for a replacement, I focus on a few things:
- Battery type: I make sure it matches the exact model my fob needs.
- Brand quality: I prefer trusted brands because they usually last longer.
- Freshness: I check the expiration date or packaging date when possible.
- Quantity: I sometimes buy a multi-pack so I have a spare ready.
Where I Usually Buy the Battery
I’ve found that Subaru key fob batteries are easy to buy from auto parts stores, electronics shops, big-box retailers, and online marketplaces. If I want convenience, I order online. If I need it right away, I go to a local store. In my experience, both options work well as long as I verify the battery type first.
Tools I Keep Ready for the Replacement
Replacing the battery is usually simple, but I like to keep a small flathead screwdriver or a plastic pry tool nearby. I also use a soft cloth to avoid scratching the fob. I’ve learned that being gentle matters, because the casing can be delicate.
What I Check Before Installing the New Battery
Before I insert the new battery, I make sure the contacts inside the fob are clean and not bent. I also pay attention to the battery orientation, because placing it the wrong way can stop the fob from working. Taking a few extra seconds here saves me from having to reopen the fob later.
Signs I Should Replace the Battery Soon
These are the warning signs I usually watch for:
- Reduced range when unlocking or locking the car
- Intermittent button response
- Dashboard warning about the key fob battery
- Needing to press buttons more than once
My Final Buying Advice
If I were buying a Subaru key fob battery again, I’d start by confirming the exact battery model, then I’d choose a reliable brand and keep a spare on hand. In my experience, a small, inexpensive battery can prevent a lot of frustration. The key is to buy the correct one and replace it before the fob stops working completely.
Final Thoughts
Replacing my Subaru key fob battery is a simple maintenance task that can save me time and frustration when the remote starts to weaken. With the right battery and a few basic steps, I can get my key fob working again without needing a trip to the dealership. I’ve found that checking the battery early helps me avoid being stuck with a dead fob at the worst possible moment.
Author Profile
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Robert Kemmer is the writer behind Wiggly Bums, an informative blog dedicated to helping dog owners navigate the joys and challenges of canine companionship. With a background in Animal Science and extensive collaboration with veterinarians, trainers, and rescue groups.
He blends expertise with empathy in every article. Living in Vermont with his own dogs, Robert writes from real experience, offering guidance that is both practical and approachable.
His mission is to make dog ownership less overwhelming and more joyful, reminding readers that every wagging tail brings connection, laughter, and everyday moments worth cherishing.
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