Subaru Key Fob Battery Replacement – Buy Key Fob for Subaru

If your Subaru key fob has started working only at close range, needs repeated button presses, or triggers a low key battery warning, the good news is that the fix is usually R2032 or CR2025 battery, while some older designs use a CR1620, and swapping the battery usually takes just a few minutes at home. If you also drive a Subaru and want to compare 12V battery options for the vehicle itself, see Subaru. This guide covers what battery a Subaru key fob uses, how to choose the correct replacement, Subaru key fob battery replacement by model, step-by-step instructions, common problems after installation, and when it may be better to replace the full fob instead of just the battery.

• Table of Contents:
• Buy Key Fob Battery Replacement for Subaru
• Subaru Key Fob Battery Replacement by Model
• How to Replace a Subaru Key Fob Battery
• Common Subaru Key Fob Problems
• Battery Replacement vs New Key Fob for Subaru
• Subaru Key Fob FAQ

Buy Key Fob Battery Replacement for Subaru

When buying a Subaru key fob battery replacement, the most important thing is matching the exact battery type used inside your remote. Subaru has used several fob designs over the years, and the battery is often determined by the shape of the remote rather than the model name alone. In general, many newer rectangular Subaru smart keys use a CR2032, many older teardrop-shaped remotes use a CR2025, and some older exposed-metal-key designs use a CR1620. Before ordering, it is always smart to open the fob and confirm the code printed on the old battery. To compare current options, you can browse Subaru key fob battery replacements, or look directly at CR2032 replacements for Subaru key fobs, CR2025 replacements for Subaru key fobs, and CR1620 replacements for older Subaru key fobs.

• CR2032 battery for newer Subaru smart keys: This is one of the most common choices for newer Subaru rectangular push-button-start remotes. It is a thicker coin cell with strong capacity and is often the right match for newer Outback, Forester, Ascent, and Crosstrek key fobs. A quick way to compare options is through CR2032 Subaru key fob battery listings. Typical price: about $5 to $14 for a multi-pack.
• CR2025 battery for older Subaru teardrop remotes: Many older Subaru key fobs use the slimmer CR2025 battery. It looks similar to a CR2032 but is thinner, so it should only be used if that exact code is printed on your old battery. You can compare CR2025 options for Subaru key fobs. Typical price: about $5 to $12 for a multi-pack.
• CR1620 battery for older Subaru key styles: Some older Subaru remotes with an exposed metal key use CR1620 cells. Because these are less common today, it helps to search specifically for CR1620 Subaru key fob batteries instead of shopping by model name only. Typical price: about $5 to $10 for a small pack.
• Name-brand battery multipacks: If you want better shelf life and more consistent performance, a name-brand Panasonic CR2032, Energizer CR2025, or similar replacement can be a smart upgrade over no-name cells. Typical price: about $6 to $15 depending on brand and quantity.
• Subaru key fob shell and battery kits: If the remote still works but the case is cracked or the buttons are worn smooth, it can help to compare Subaru key fob shell and battery kits so you can refresh the battery and housing at the same time. Typical price: about $10 to $25.

Subaru Key Fob Battery Replacement by Model

• Subaru Outback key fob battery replacement: Many newer Outback key fobs use a CR2032, especially rectangular smart key designs with push-button start. Some older Outback remotes may use a different battery, so the safest move is to verify the number on the old battery before ordering from Outback battery listings.
• Subaru Forester key fob battery replacement: Newer Forester smart keys commonly use CR2032, while some older fob styles may use CR2025. If your Forester shows a low battery warning but still starts normally, a fresh battery is usually the first thing to try.
• Subaru Crosstrek key fob battery replacement: Many Crosstrek fobs use CR2032 in newer rectangular smart key housings. If you want to compare options in advance, browse Crosstrek replacement batteries and then match the printed code inside the remote.
• Subaru Ascent key fob battery replacement: The Ascent commonly uses the newer Subaru smart key style, which often takes a CR2032. Because family SUVs see heavy daily use, replacing the battery at the first sign of weak range can prevent lockout frustration later.
• Subaru Legacy key fob battery replacement: Legacy sedans may use different Subaru fob styles depending on year and trim. Older remotes often point to CR2025, while newer smart keys often point to CR2032. Search terms like Legacy key fob battery options can help narrow the choices.
• Subaru Impreza key fob battery replacement: Impreza key fobs span older teardrop remotes and newer smart key designs, so battery type depends heavily on the actual fob style. Always open the remote before choosing between CR2025 and CR2032.
• Subaru WRX and STI key fob battery replacement: Because WRX and STI owners often keep older and newer models on the road, these cars are a perfect example of why confirming the original battery code matters. Some older fobs use CR2025, while newer smart remotes often use CR2032.
• Subaru BRZ key fob battery replacement: BRZ key fobs can vary by generation and trim, but the battery replacement process is usually quick once the emergency key is removed and the housing is opened carefully. Keeping a spare BRZ replacement battery in the garage is a good idea if the car is not driven every day.

To choose the right replacement key fob battery for Subaru, focus on the actual remote design and the battery code already installed inside it rather than relying only on the vehicle model. Subaru has used multiple remote shapes across Outback, Forester, Impreza, Legacy, Crosstrek, WRX, BRZ, and Ascent, so two different Subaru key fobs can use different batteries even if the vehicles are close in year. The best match is always the same size and code as the original battery, plus a quality lithium coin cell from a trusted brand. If the fob housing is damaged too, you can also compare Subaru replacement key fob shells so you can refresh the remote in one go.

How to Replace a Subaru Key Fob Battery

1. Gather the tools and parts first. You will need your Subaru key fob, the correct replacement battery, and a small pry tool or screwdriver. Many owners use a small flathead screwdriver, a precision screwdriver set, or plastic pry tools to open the case more gently.
2. Remove the emergency key. Press the release button on the back or side of the Subaru key fob and slide out the metal emergency key. This usually reveals the seam or notch used to open the remote.
3. Find the opening seam. Look near the emergency key slot or the outer edge of the fob for a small gap where the case halves meet. Subaru smart keys often separate most easily from this point.
4. Open the key fob carefully. Insert the tip of the screwdriver or pry tool into the seam and twist gently. Work slowly so you do not crack the plastic or bend the clips. If the fob does not open easily, move to a different point on the seam rather than forcing one section.
5. Note the battery position before removing it. Once the case is open, look closely at how the battery sits in the holder. Pay attention to the positive (+) side so the new battery goes in the same way.
6. Confirm the battery code. Read the printed number on the old battery. Many Subaru fobs use CR2032 or CR2025, while some older designs use CR1620. This is your final confirmation before installing the replacement.
7. Remove the old battery gently. Use your fingernail, a non-metal tool, or the edge of the screwdriver carefully to lift the battery out without damaging the metal contact points.
8. Install the new battery in the same orientation. Slide the fresh battery into place with the same polarity as the original. If the battery is upside down or not fully seated, the Subaru key fob may not respond even though the battery is new.
9. Inspect the inside before closing. Check that the buttons, rubber membrane, and internal contacts are aligned correctly. If there is dust inside the fob, wipe it gently with a dry cloth rather than using moisture.
10. Snap the case back together and test it. Press the two halves together until they click, reinsert the emergency key, and test lock, unlock, panic, trunk or hatch release if equipped, and push-button-start recognition if your Subaru has it.

Common Subaru Key Fob Problems

• Subaru key fob still does not work after battery replacement: The most common reasons are wrong battery size, incorrect orientation, or the battery not seated properly under the retaining clip. Recheck whether the original battery was CR2032, CR2025, or CR1620.
• Weak range after installing a new battery: If the Subaru only responds when you stand very close, the replacement battery may be low quality or old from storage. Switching to a fresh name-brand replacement battery often helps.
• Key fob case will not close fully: This often happens when a thicker battery is installed in a fob designed for a thinner one, such as using CR2032 where CR2025 belongs. Never force the housing shut.
• Dashboard low key battery warning stays on: Some Subaru vehicles may need a short drive cycle for the warning to clear, but if the message returns quickly, the battery may be poor quality or the fob may have an internal issue.
• Buttons feel worn or sticky: In that case, the battery may not be the only problem. A replacement shell can sometimes restore button feel without needing a fully new electronic remote.
• Push-button start recognizes the key only when very close: This is a classic low-battery symptom on Subaru smart keys and one of the best signs that battery replacement is overdue.
• Emergency key works but remote buttons do not: That usually points to a key fob battery, contact, or circuit issue rather than a door lock problem on the vehicle itself.

Battery Replacement vs New Key Fob for Subaru

For most Subaru owners, replacing the battery is the first thing to try and usually the right fix. If the remote range has dropped, the vehicle shows a low key battery warning, or the buttons need multiple presses, a fresh replacement battery is usually much cheaper and faster than replacing the entire remote. This is especially true when the case is intact and the fob still works intermittently.

A full new key fob makes more sense when the Subaru remote has broken internal electronics, water damage, a cracked board, or severe physical wear that goes beyond the battery. If the housing alone is worn, a replacement shell may be enough. But if the remote no longer communicates with the vehicle even after installing the correct new battery, then replacing the complete fob may be the better long-term solution. In most cases, battery first, shell second if needed, and full fob replacement only when the remote itself has failed is the most cost-effective Subaru-specific approach.

Subaru Key Fob FAQ

What battery does a Subaru key fob use?

Most Subaru key fobs use either a CR2032 or CR2025 lithium coin battery, while some older Subaru key designs use a CR1620. The easiest way to confirm is to open the fob and read the battery code printed on the old battery.

How do I know if my Subaru key fob battery is dying?

Common signs include reduced lock and unlock range, needing to press buttons multiple times, inconsistent push-button-start recognition, or a low key battery warning on the dashboard.

Can I replace a Subaru key fob battery myself?

Yes. In most cases, Subaru key fob battery replacement is a simple DIY job that takes only a few minutes with the correct battery and a small pry tool or screwdriver.

Will changing the battery erase my Subaru key fob programming?

No, replacing the battery normally does not erase the key fob programming. If the remote stops working afterward, the usual cause is incorrect battery orientation, the wrong battery type, or poor battery contact.

Can I use a CR2032 instead of a CR2025 in my Subaru key fob?

Only if your Subaru key fob was designed for a CR2032. The two batteries have the same diameter but different thickness, so using the wrong one can prevent proper fit and reliable contact.

How long does a Subaru key fob battery last?

Battery life varies with usage, climate, and battery quality, but many Subaru key fob batteries last around two to four years before the range and responsiveness begin to drop.

What should I do if my Subaru key fob still does not work after changing the battery?

Reopen the fob and check the battery number, polarity, and seating. Also inspect the internal contacts and the case. If it still does not work, the remote may have a damaged board, worn shell, or another fault beyond the battery.

Do I need a new key fob or just a new battery for my Subaru?

If the Subaru remote still works sometimes and mainly shows weak range or a low battery warning, a battery is usually all you need. If the remote has broken buttons, water damage, or no response at all even with the correct fresh battery, then a shell replacement or full new key fob may be the better choice.