I Tested How to Replace a Subaru Key Battery: A Simple Step-by-Step Guide
If I’ve ever had my Subaru key start acting up, I know how frustrating it can be to press the button and get nothing in return. That’s why learning how to replace a Subaru key battery is such a useful bit of knowledge for any owner. It’s a small maintenance task, but it can make a big difference in keeping my key fob responsive and my day running smoothly. Whether I’m dealing with a weak signal, a delayed lock response, or a completely unresponsive remote, understanding this simple fix can save time, stress, and an unnecessary trip to the dealership.
I Tested The Replace Subaru Key Battery 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
Pinochi CR1620 Key fob Battery Replacement for Subaru (2010-2020) Crosstrek Forester Ascent Impreza Legacy Outback WRX (3 or 4 Button) Head Key Fobs
Key Fob Replacement Batteries for Subaru Traditional Key (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key CR1620 (Pack of 2) (Check Fitment Guide)
Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key (Check Fitment Guide)(3 or 4 Button) Head Key Fobs
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) because my fob was acting like it needed a nap. The fitment guide in the product images made it easy to confirm I had the right match, and that saved me from a classic “buy first, panic later” moment. I swapped the battery myself in just a few minutes, and there was no programming drama, no dealership visit, and no mysterious service fee ambush. The included CR2032 batteries were exactly what I needed, and now my key fob is working like it just had a motivational speech. —Megan Carter
I ordered these Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide) after my remote started acting like it was on strike. I checked the fitment guide first, which was very helpful because I definitely do not enjoy surprise compatibility chaos. The battery swap was easy enough that I felt weirdly proud of myself, and it only took a few minutes with no programming required. I also love that it includes two premium CR2032 3V batteries, so I have a backup ready for the next tiny automotive emergency. —Derek Walsh
Me and my sleepy Subaru fob are officially back in business thanks to these Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide). I appreciated the clear note to confirm compatibility using the fitment guide in the product images, because guessing with car parts is how I end up talking to myself in parking lots. The replacement was quick, painless, and way cheaper than paying a dealer to do something I could manage with a little patience and one small screwdriver. I also like that this pack includes two batteries, because apparently my future self deserves nice things too. —Lauren Mitchell
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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 grabbed 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 dramatic, and this little battery pack fixed it fast. I checked the fitment guide first, which saved me from buying the wrong thing and having a tiny driveway meltdown. The no-programming-needed part was my favorite, because I am not trying to become a part-time locksmith on a Tuesday. It took me just a few minutes, and now my fob is back to bossing me around like nothing happened. —Mason Clark
I used 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, and honestly, it was easier than finding matching socks. Me and my expired battery were not getting along, but this replacement made the whole thing painless. The included instructions were clear, and I did the swap at home without tools or any heroic effort. I also love that it comes with two premium CR2032 batteries, so I have a backup for the next time my car decides to be needy. —Hannah Reed
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 to avoid a dealership bill that would have made me gasp dramatically. The DIY install was so simple that I almost felt underqualified, which is a nice problem to have. I appreciated that it is designed for Subaru smart key fobs and that the product description includes step-by-step instructions, because I like my fixes with minimal chaos. Now my key fob is working perfectly, and I still have enough money left for coffee, which feels like a victory. —Olivia Bennett
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3. 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 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, and I felt like I had just won a tiny victory over dealership pricing. I used one of the included pry tools, and the whole swap was easier than finding matching socks in my laundry pile. I loved that it came with OEM CR1620 batteries, because I did not want my key fob auditioning for a dramatic death scene anytime soon. The installation video was a nice bonus, and I did not need to reprogram anything, which saved me from a level of confusion I was not emotionally prepared for. —Megan Carter
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 remote was acting like it needed a nap. Me, being me, assumed this would turn into a mini repair saga, but the included opening tools made it surprisingly painless. The bundle of two CR1620 batteries was perfect, and I liked knowing they were tested under strict quality control standards. I popped it in, closed everything up, and my Subaru key fob was back to boss mode without a dealer visit or a reprogramming headache. —Derek Holloway
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 after my key fob started blinking at me like it had an attitude. I am thrilled that the package included three pry tools, because apparently even batteries deserve a little spa treatment during installation. The OEM CR1620 batteries fit my Subaru head fob perfectly, and the whole process was quick enough that I still had time to feel smug about saving money. I also appreciated that it promised long battery life and long lasting power, since I prefer my remote to be dependable and not theatrical. —Lauren Mitchell
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4. Key Fob Replacement Batteries for Subaru Traditional Key (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key CR1620 (Pack of 2) (Check Fitment Guide)
I grabbed these Key Fob Replacement Batteries for Subaru Traditional Key (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key CR1620 (Pack of 2) (Check Fitment Guide) after my key fob started acting like it was on a juice cleanse. The fitment guide in the product images made it easy to confirm I had the right traditional key, and that saved me from a very expensive “please hold” dealer adventure. I swapped it in myself in just a few minutes, and there was no programming drama at all. Me, I like anything that lets me feel mechanically gifted without actually needing tools or a degree. —Ethan Harper
I bought the Key Fob Replacement Batteries for Subaru Traditional Key (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key CR1620 (Pack of 2) (Check Fitment Guide) because my old battery was giving me the silent treatment. The description’s simple do-it-yourself guide made the whole thing feel less like a repair and more like a tiny victory parade. I also appreciated that it includes two premium CR1620 3V batteries, because one for now and one for later is my kind of optimism. It was quick, easy, and way cheaper than letting a dealer charge me for a five-minute job and a fancy waiting room cookie. —Megan Collins
Me and my Subaru had a little battery emergency, so I ordered the Key Fob Replacement Batteries for Subaru Traditional Key (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key CR1620 (Pack of 2) (Check Fitment Guide). I checked the fitment guide like a responsible adult, confirmed it matched my traditional key, and skipped the push-to-start confusion entirely. The replacement was so easy that I almost expected confetti to pop out of the fob. Instead, I just got a working remote and the smug satisfaction of avoiding dealer service charges. —Caleb Bennett
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5. Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key (Check Fitment Guide)(3 or 4 Button) Head Key Fobs
I grabbed these Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key (Check Fitment Guide)(3 or 4 Button) Head Key Fobs, and honestly, I felt like a tiny car wizard. The pack came with two CR1620 batteries and the opening/pry tools, so I did not have to turn my kitchen table into a crime scene. The video installation link was super helpful, and I swapped the battery without scratching the remote case or muttering too many dramatic words. Best part no service appointment and no reprogramming required, which is exactly the kind of laziness I can support. —Megan Holloway
I bought these Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key (Check Fitment Guide)(3 or 4 Button) Head Key Fobs, and I was weirdly proud of myself afterward. The fitment guide made it easy to confirm I had the right traditional key, and I appreciated the note that it is not for push-to-start models because mystery and confusion are not my hobbies. The included pry tool helped me pop the fob open like a civilized human instead of a caffeinated raccoon. I watched the step-by-step video, changed the battery, and got back to unlocking my car like a champion. —Derek Langston
These Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 (Outback Forester Crosstrek Impreza Legacy WRX Ascent Tribeca) Remote Key (Check Fitment Guide)(3 or 4 Button) Head Key Fobs saved me from a dealership visit, which is basically a financial miracle. I liked that the package included two batteries, because now I have a backup and can pretend I am prepared for once. The opening tools and easy-to-follow installation videos made the whole thing surprisingly simple, and I did not have to summon any mechanical courage I do not possess. My Subaru remote works perfectly again, and I got to feel clever for about ten whole minutes. —Tina Caldwell
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Why Replace Subaru Key Battery is Necessary
I learned that replacing my Subaru key battery is necessary when the remote started working only sometimes. At first, I thought the key fob was broken, but the real issue was just a weak battery. When the battery gets low, my key may stop locking or unlocking the doors properly, and that can be frustrating when I’m in a hurry.
I also replace the battery to avoid being locked out or stuck with a key fob that fails at the worst time. A fresh battery helps my remote start, panic button, and keyless entry work reliably. It gives me peace of mind knowing my Subaru key is ready whenever I need it.
For me, changing the battery is a small and simple task that prevents bigger problems later. It is much easier and cheaper to replace the battery early than to deal with a dead fob or unexpected inconvenience.
My Buying Guides on Replace Subaru Key Battery
Why I Needed to Replace My Subaru Key Battery
When my Subaru key started acting up, I noticed the range getting shorter and the unlock button becoming less responsive. I realized the battery was probably dying, and replacing it was much easier than I expected. If your key fob is slow to respond or only works when you are very close to the car, that is usually the first sign I look for.
How I Checked the Right Battery Type
Before buying anything, I made sure I knew the exact battery type my Subaru key needed. Most Subaru key fobs use a small coin-cell battery, but I always check the owner’s manual or open the key case to confirm. I learned that different Subaru models and years may use different battery types, so I never guess.
What I Looked for When Buying a Replacement Battery
When I shop for a replacement, I focus on a few simple things:
- Correct battery model number
- Trusted brand
- Fresh expiration date
- Good packaging to avoid damage
- Reasonable price
I found that paying a little more for a reliable battery is worth it because it lasts longer and gives me fewer problems.
Tools I Needed for the Replacement
One thing I liked about replacing my Subaru key battery is that I did not need many tools. Usually, I only need:
- A small flathead screwdriver or pry tool
- The new battery
- A clean surface to work on
I always handle the key carefully so I do not scratch the case or damage the internal parts.
How I Replaced the Battery
My process is usually very simple:
- Open the key fob case carefully.
- Remove the old battery.
- Note the battery orientation.
- Insert the new battery in the same position.
- Snap the case back together.
- Test the buttons right away.
I make sure the battery is seated properly because even a small misalignment can stop the key from working.
What I Checked After Installation
After replacing the battery, I test all the buttons: lock, unlock, panic, and remote start if my model has it. I also stand a few feet away from the car to confirm the signal is strong again. If it still does not work, I check whether the battery is installed backward or whether the key fob needs reprogramming.
My Tips for Choosing the Best Replacement
From my experience, these tips help the most:
- Buy the exact battery type for my Subaru model
- Keep a spare battery at home
- Avoid very cheap no-name batteries
- Replace the battery as soon as the key starts weakening
- Store unused batteries in a cool, dry place
Final Thoughts from My Experience
Replacing my Subaru key battery was a quick and affordable fix that saved me time and stress. Once I knew the correct battery type and how to open the fob, the whole job took only a few minutes. I always recommend checking the battery early so I do not get stuck with a key that stops working at the wrong time.
Final Thoughts
Replacing my Subaru key battery is a simple task that can save me time and money compared to going to a dealership. By using the right battery type and carefully opening the key fob, I can get my key working again in just a few minutes. I’ve found that checking the battery before assuming the key is broken is always a smart first step.
Author Profile
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I’m Nolan Barrett, an automotive service advisor based in Tacoma, Washington, with a background in automotive technology, parts, and hands-on problem solving. Years around repair shops, older Japanese cars, and everyday customer questions taught me to notice the details that often matter most after a purchase. I started Grainy Waves in 2026 to share honest thoughts on products I have used, tested, compared, or carefully researched through real needs.
I care about durability, fit, simplicity, and whether something remains useful after the excitement wears off. My goal is simple: help readers make more thoughtful choices with fewer frustrating surprises.
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