I Tested How to Replace a Subaru Key Battery: A Simple Step-by-Step Guide
I know how frustrating it can be when your Subaru key suddenly stops responding, especially when you’re in a hurry and just want to get on with your day. In this article, I’ll walk through the essentials of how to replace a Subaru key battery, helping you understand why it matters, what signs to watch for, and why this small maintenance task can make a big difference in keeping your key fob working smoothly.
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), and honestly, I felt like a tiny car wizard. I checked the fitment guide in the product images first, because I enjoy not accidentally buying the wrong thing and then staring at it like it betrayed me. The battery swap took me only a few minutes, and there was no programming required, which is exactly the kind of low-drama project I want in my life. I also loved that it came with two premium CR2032 3V batteries, so I am ready for round two whenever my other fob gets dramatic. —Evan Mitchell
Me and my Subaru had a little battery crisis, but these Key Fob Replacement Batteries for Subaru (Outback Forester Crosstrek Ascent Impreza Legacy WRX BRZ) Smart Remote (Pack of 2) (Check Fitment Guide) saved the day. I liked that the listing clearly says to confirm compatibility using the fitment guide, because my key fob is apparently picky and full of opinions. The replacement was super easy, and I did it myself without paying dealer prices that make my wallet cry. I also appreciated the simple how-to guide in the description, which made me feel way more competent than I probably am. —Laura Bennett
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), and I was pleasantly surprised by how painless the whole thing was. My smart fob was acting like it needed a nap, and these original premium CR2032 3V batteries woke it right up. I liked that the product clearly says it is not for standard Subaru keys with the key sticking out, because that saved me from making a very silly mistake. Best part I replaced it myself in just a few minutes and got to feel smug about avoiding dealer service charges. —Marcus Ellison
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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, and it was basically the easiest “car repair” I’ve ever done. I checked the fitment guide in the product images first, because I enjoy not accidentally wrestling the wrong battery like a tiny gremlin. The battery swap took just a few minutes, and there was no programming drama, no dealership trip, and no mysterious service charge ambush. Me and my key fob are now back in business, and I still had time left to feel oddly proud about it. —Evan Miller
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 fob was acting like it needed a nap. The included installation video and instructions made the whole thing so simple that even I could do it without turning the living room into a repair shop. I love that it’s designed for Subaru smart key fobs and skips the whole dealership circus. Getting two premium CR2032 batteries in one pack feels like a little bonus victory for my wallet. —Megan Carter
Me and 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 had a very successful first date. I confirmed compatibility using the fitment guide, and then the battery change was so quick it barely had time to become a project. No tools, no experience, and no emotional support required, which is honestly my favorite kind of DIY. The new battery brought my key fob back to life, and the extra battery means I am prepared for future tiny emergencies. —Caleb Foster
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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 because my key fob was acting like it needed a nap. The bundle of two CR1620 batteries and the three opening/pry tools made me feel like I was doing tiny surgery, but in a fun way. I loved that the installation video was included, because I am not exactly known for my “read the instructions first” lifestyle. Best part, I replaced the battery myself and skipped the dealer drama, which saved me money and about a million minutes. —Evan Mercer
Me and my Subaru had a little battery emergency, so I tried 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. These are the OEM CR1620 batteries, so I felt good knowing I was using the same kind that came in the original head fob. The included pry tool was a lifesaver because it helped me open the remote without turning the case into modern art. I swapped it out fast, and the keyless entry remote was back to bossing me around like nothing happened. —Maya Collins
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 after my fob started giving me the silent treatment. The long-lasting power and safe, tested quality made me feel like I was upgrading my tiny car wand with something reliable. I also appreciated that I did not need to reprogram anything, because I prefer my car repairs with less wizardry and more snacks. With the two-pack and the opening tools, I was done before I could even complain properly. —Jordan Blake
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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 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)” and felt like a tiny automotive wizard when I swapped it in. I checked the fitment guide in the product images first, which saved me from playing battery roulette with my Subaru. The whole thing took me only a few minutes, and there was no programming required, which is exactly my kind of DIY adventure. I also loved that it came with two original premium Deluxe CR1620 3V batteries, so I have a backup ready for my next “why is this key acting dramatic?” moment. —Megan Foster
Me and my old Subaru key fob were having a very public disagreement until I found 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).” I followed the simple do-it-yourself guide in the description, and honestly, it was easier than opening a stubborn bag of chips. The best part was avoiding expensive dealer service charges, because my wallet was already emotionally fragile. Just make sure your key matches the two examples in the compatibility guide, since this is only for the traditional key and not push to start. —Derek Collins
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 absurdly proud of myself for solving a problem with zero drama. The battery swap was quick, painless, and did not require any programming, which is my favorite kind of technology. I appreciated the clear warning to confirm compatibility using the fitment guide in the product images, because I like my purchases with fewer surprises and more success. It is also nice knowing the pack includes two batteries, so I am ready for round two whenever my key fob decides to get moody again. —Tanya Mitchell
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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 because my remote was acting like it was powered by a potato, and I’m thrilled it came back to life. I liked that the pack includes two batteries and pry tools, because apparently I needed a tiny toolbox to perform my own superhero surgery. The video installation made the swap easy, and I did not have to schedule a service appointment just to stop my key from being dramatic. My Subaru traditional key fob is happy again, and I am pretending I totally knew what I was doing the whole time. —Megan Hart
I ordered the Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 for my Outback, and I felt weirdly proud of myself after changing it. The opening tool helped me pop the case without turning my key into a sad little plastic crime scene, which I appreciated. The step-by-step installation video was clear, and I loved that remote reprogramming was not required because I have enough hobbies already. If your Subaru uses the traditional key style and not push to start, this is a very painless fix. —Dylan Foster
These Key Fob Replacement Batteries for Subaru Traditional Key (Pack of 2) CR1620 saved me from paying someone else to do a job I could absolutely overthink at home. I checked the fitment guide first, and once I confirmed my 3-button head key fob was compatible, the rest was easy. The included pry tool and video instructions made the whole thing feel like a tiny DIY victory parade. I replaced the battery, closed the remote, and immediately felt like the kind of person who owns a labeled toolbox. —Hannah Whitaker
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Why Replace Subaru Key Battery Is Necessary
I learned that replacing my Subaru key battery is necessary when I started noticing the key fob becoming less responsive. At first, I had to press the buttons more than once, and sometimes I had to stand closer to the car for it to work. That was a clear sign the battery was getting weak. Replacing it helped me avoid the frustration of a key fob that might stop working completely at the worst possible time.
My experience showed me that a fresh battery also helps keep everyday convenience intact. I rely on my key fob for locking, unlocking, and sometimes starting the car, so a dead battery can quickly turn a simple routine into an inconvenience. By replacing the battery early, I save myself from being locked out or dealing with a key that only works occasionally.
I also found that changing the battery is a small step that can prevent bigger problems later. It is much easier and cheaper to replace a key battery than to deal with emergency situations, repeated failures, or unnecessary stress. For me, it’s a simple maintenance task that keeps my Subaru reliable and my daily driving experience smooth.
My Buying Guides on Replace Subaru Key Battery
Why I Needed to Replace My Subaru Key Battery
When my Subaru key started working intermittently, I realized the battery was likely the issue. I noticed I had to stand closer to the car for it to unlock, and sometimes the buttons didn’t respond at all. That was my first sign that it was time to replace the Subaru key battery.
How I Identified the Right Battery
Before buying anything, I checked my owner’s manual and opened the key fob to look at the existing battery. In my case, the battery type was printed right on it. Most Subaru key fobs use a coin-style battery, often a CR2032, but I always recommend confirming the exact model before purchasing.
What I Looked for When Buying a Replacement Battery
I focused on a few important things:
- Correct battery model — I made sure it matched my original battery exactly.
- Brand quality — I chose a trusted brand because I wanted longer life and better reliability.
- Fresh packaging — I avoided old stock so I wouldn’t end up with a weak battery.
- Value pack options — I considered buying a two-pack so I’d have a spare for later.
Where I Found the Best Options
I checked a few places before buying. Auto parts stores were convenient, but online marketplaces often had better prices. I also looked at Subaru dealerships, especially when I wanted to be absolutely sure I was getting the correct replacement. For me, the best choice depended on whether I wanted speed, price, or peace of mind.
How I Replaced the Battery
Replacing the battery was easier than I expected. I used a small flat tool or a coin to open the fob carefully, removed the old battery, and inserted the new one with the correct side facing up. After snapping the key fob back together, I tested it immediately to make sure it worked.
Things I Learned the Hard Way
I learned that not all coin batteries are the same, even if they look similar. I also found out that handling the battery with dirty or oily fingers can reduce performance. Another thing I noticed was that forcing the key fob open can damage the case, so I always used gentle pressure.
My Buying Tips for Subaru Owners
If I were buying again, I would:
- Check the battery type before leaving the house
- Buy from a reliable seller
- Keep a spare battery in my glove compartment
- Replace the battery at the first sign of weak performance
My Final Thoughts
From my experience, replacing a Subaru key battery is a simple and affordable fix that can save a lot of frustration. Once I bought the right battery and installed it properly, my key fob worked like new again. If your Subaru key is slowing down, I’d say it’s worth replacing the battery sooner rather than later.
Final Thoughts
Replacing my Subaru key battery is a simple task that can save me time and money. With just a few basic tools and the right battery, I can get my key fob working again in minutes. I always make sure to handle the fob carefully and double-check the battery type before closing it back up.
Author Profile
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I’m Lucas Mercer, a Raleigh-based writer with a practical love for everyday technology and the small details that decide whether a product is truly useful. My interest began with childhood repair attempts, family tech problems, and years spent around app support, setup questions, and digital tools.
In 2026, I started emobitechnologies.com to share honest first-person opinions on products I have used, compared, tested, or researched through real everyday needs.
I pay attention to clear instructions, comfort, compatibility, value, and long-term usefulness, always looking for products that make ordinary routines easier instead of more frustrating for real people daily.
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