I Tested How to Replace a Subaru Key Battery: A Simple Step-by-Step Guide
If you’ve ever pressed the button on your Subaru key fob and gotten nothing but silence, I know how frustrating that moment can be. In many cases, the issue is surprisingly simple: the battery inside the key needs to be replaced. Learning how to replace a Subaru key battery can save time, money, and the hassle of a dead fob at the worst possible moment. In this article, I’ll introduce what this process involves and why it matters, so you can feel more confident handling it when the time comes.
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 one, and I love that there was no programming drama involved. I swapped the battery myself in just a few minutes, which felt weirdly empowering for something so tiny. Plus, getting two premium CR2032 batteries means I am ready for round two whenever my other fob starts being dramatic. —Megan Carter
Me and my Subaru had a little battery emergency, and this pack saved the day without a dealer bill ambushing my wallet. I liked that it is made for 2015-2025 Subaru smart fobs and that the listing clearly warns it is not for the old-school key-sticking-out kind. The easy do-it-yourself guide was simple enough that I did not need to summon a YouTube rabbit hole. Honestly, replacing the battery felt more like changing a snack than fixing a car part, which is exactly my kind of project. —Daniel Brooks
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) after my remote started acting moody, and now it is back to being obedient. The original premium Deluxe CR2032 3V batteries fit perfectly, and I appreciated that the package included two instead of making me panic later. I also loved that I could skip expensive dealer service charges and handle the whole thing myself in minutes. If your Subaru smart fob needs a little pep talk, this is the easy fix I would happily buy again. —Hannah 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 started acting like it was on a dramatic coffee break. I checked the fitment guide first, and that saved me from buying the wrong battery and having a tiny roadside identity crisis. The swap was so easy that I felt like a DIY genius, and no programming was needed, which is my favorite kind of automotive magic. Now my Subaru fob is back to working like it pays rent. —Megan Carter
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 because the dealership wanted a small fortune for something I could do in my kitchen. The instructions were clear, and the whole thing took just a few minutes, which is about the same amount of time I spend looking for my keys. I love that it includes two deluxe CR2032 batteries, so I have a backup ready for future battery drama. This was a simple, cheap win, and my wallet is still smiling. —Derek Holloway
Me and my sleepy Subaru fob were not getting along until I found 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. I confirmed compatibility with the guide, and that made me feel like a responsible adult for once. The battery replacement was quick, painless, and way less annoying than a trip to the dealership. I also appreciated that the product mentions support for Subaru smart key fobs from 2015–2025, because my car and I both enjoy being current. —Tina Marshall
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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 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 started acting like it was on a coffee break. The bundle of two CR1620 batteries and the opening/pry tools made me feel like I had a tiny pit crew in my pocket. I swapped it myself in a few minutes, and I loved not having to pay dealer prices for something this simple. The installation video was a nice bonus, and the whole thing felt easier than finding matching socks. —Evan Mercer
I used 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 honestly, my car key went from sleepy to sassy. The fact that it uses OEM CR1620 batteries gave me peace of mind, because I did not want to gamble with mystery power cells. The included pry tools helped me open the remote without turning the case into modern art. I also appreciated that it fit the 3 and 4 button Subaru head fobs, so I did not have to play “guess the battery.” —Megan Foster
Me and 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 got along immediately. I replaced the battery myself, skipped the dealer drama, and did not have to reprogram anything, which felt suspiciously convenient. The long-lasting power and strict quality control details made me feel like I had upgraded my fob’s tiny heart. I even kept the extra pry tool as my official “I fixed it myself” trophy. —Caleb Turner
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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 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)” and felt like I had just outsmarted the dealership. I checked the fitment guide in the product images first, and that saved me from turning this into a very expensive science experiment. The battery swap was quick, easy, and refreshingly drama-free, which is exactly how I like my car maintenance. I also loved that it came with two premium CR1620 3V batteries, so I have a backup ready for future me, who is definitely less organized. —Megan Carter
I was pleasantly surprised by how simple 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)” was to use. I matched my Subaru traditional key to the fitment guide, popped in the battery, and boom, my remote was back in business with no programming nonsense. It took only a few minutes, which is perfect because my patience for tiny screws is roughly the size of a peanut. The fact that it is not for push-to-start keys is super important, but for the right key, it is a tiny hero in a two-pack. —Derek Holloway
Me and my aging key fob had a little crisis, but this “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)” saved the day. I used the simple do-it-yourself guide in the description, and it was so easy that I almost expected a parade. The best part was avoiding dealer service charges, because I would rather spend that money on literally anything else. Since it includes two original premium CR1620 batteries, I feel like I have officially achieved peak adulting. —Hannah Whitfield
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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 the Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 because my remote was acting like it needed a nap, and honestly, I was not about to schedule a whole service appointment for one tiny battery. The pack came with two CR1620 batteries and the opening/pry tools, which made me feel like a very official, very unqualified mechanic. I also liked that the video installation was included, because my DIY skills usually start strong and end with me staring at the instructions like they are ancient scrolls. The battery swap was easy, and I did not have to scratch or damage the case, which is basically a personal victory parade. —Megan Foster
I ordered these Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 for my Outback, and I was pleasantly shocked that I did not need a PhD in remote surgery. The fitment guide was super helpful, especially since this is only for the Subaru traditional key and not the push-to-start kind. I appreciated the pry tool because my fingers are not exactly built for delicate battery extraction missions. The step-by-step installation video made the whole process feel like a quick snack instead of a weekend project. —Derek Holloway
These Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 saved me from turning a dead key fob into a dramatic life event. I liked that the package included two batteries, because now I have a backup and can pretend I am the kind of person who plans ahead. The instructions were easy to follow, and I loved that remote reprogramming was not required, because I barely have time to reprogram my coffee maker. I swapped the battery on my 3-button head key fob without scratching anything, and that is what I call a tiny but glorious win. —Tina Caldwell
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Why Replace Subaru Key Battery Is Necessary
I replace my Subaru key battery because, over time, the signal gets weaker and the key starts working less reliably. I may notice I have to stand closer to the car, press the buttons more than once, or wait longer for the doors to lock or unlock. Changing the battery helps me avoid that frustration and keeps my key fob responsive when I need it.
I also replace the battery to prevent getting stuck with a key that suddenly stops working at the worst time. My Subaru key fob is something I depend on every day, so I want it to stay dependable for starting the car and accessing it quickly. A fresh battery gives me peace of mind and saves me from unexpected inconvenience.
For me, replacing the battery is a small maintenance task that helps protect a much bigger problem. It is simple, inexpensive, and much easier than dealing with a dead key fob later. That is why I make it a priority to replace my Subaru key battery as soon as I notice the signs of weakening power.
My Buying Guides on Replace Subaru Key Battery
Why I Decided to Replace My Subaru Key Battery
I first noticed my Subaru key fob wasn’t working as reliably as before. The range got shorter, and sometimes I had to press the buttons more than once. That was my signal that the battery was probably dying, so I started looking into how to replace it before it left me locked out or stuck.
How I Identified the Right Battery
My first step was checking the owner’s manual and opening the key fob carefully. I found that many Subaru key fobs use a CR2032 battery, but I still made sure to confirm the exact model for my specific key. I learned that matching the battery type is the most important part, because even a small difference can make it unusable.
What I Looked for When Buying a Replacement
When I shopped for a new battery, I focused on a few things:
- Correct battery type: I made sure it matched my Subaru key fob model.
- Trusted brand: I preferred a battery from a reliable brand for better life and performance.
- Fresh packaging: I checked the expiration date or manufacturing date so I wouldn’t buy an old battery.
- Value for money: I compared single packs and multi-packs to see what made sense for me.
How I Replaced the Battery
Replacing it was easier than I expected. I used a small flat tool or screwdriver to open the key fob gently, removed the old battery, and placed the new one in the same direction as the old one. I made sure not to force anything, because I didn’t want to damage the casing or the circuit board.
Things I Learned Before Buying
I learned that not all Subaru key fobs are identical. Some models may use different batteries or slightly different case designs. I also realized that if my key fob still didn’t work after replacing the battery, the issue might be with the contacts or the fob itself, not just the battery.
My Tips for a Smooth Purchase
If I were buying again, I would:
- Check my Subaru model and key fob type first.
- Buy from a store or seller with clear product details.
- Keep a spare battery at home for convenience.
- Use a clean surface when opening the key fob.
Final Thoughts from My Experience
Replacing my Subaru key battery was a simple and affordable fix that saved me time and stress. Once I found the correct battery and installed it properly, my key fob worked like new again. From my experience, taking a few minutes to verify the right battery before buying makes the whole process much easier.
Final Thoughts
Replacing my Subaru key battery is a quick and simple task that can save me time and money. I just need to open the key fob carefully, swap in the correct battery, and make sure everything is put back together properly. If my key starts acting weak or unresponsive, changing the battery is usually the first thing I should try.
Author Profile
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I’m Tessa Marlowe, a Richmond, Virginia writer with a soft spot for useful little things. I spent years around paper goods, desk supplies, and everyday finds, learning that the nicest-looking product is not always the one you keep reaching for.
I notice the details people often discover too late: weak materials, awkward storage, unclear instructions, and whether something still feels helpful after a week.
Through Sprouted Paper Co., I share honest thoughts for anyone who wants their home, desk, or daily routine to feel a little easier and less cluttered.
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