2020 Subaru Ascent Battery Size
The 2020 Subaru Ascent uses a BCI Group 35 battery, rated about 540-640 cold cranking amps (EFB).
Key takeaways
- Battery: BCI Group 35, 540-640 CCA, EFB.
- Replace with the same Group 35.
- In cold weather, choose a battery at or above 640 CCA.
- It comes with a flooded battery; you can upgrade to AGM in the same group size.
- Battery type (OEM)
- EFB
- Cold cranking amps (CCA)
- 540-640
- Terminal position
- Standard-terminal layout
- Dimensions (L×W×H)
- 230×175×225 mm
Start-stop trims ship an EFB battery. Always confirm against your owner's manual or current battery label.
The right battery for your 2020 Subaru Ascent
Match the group size (Group 35) and aim for at least 540 CCA - more in cold climates. A standard flooded battery is fine, or upgrade to AGM for longer life. A battery is heavy to ship, so buying in person can win once you count free install and the core-charge refund - but to compare prices and reviews:
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Shop the Group 35 batteryWhat does a 2020 Subaru Ascent battery cost?
| Typical price | $200-235 |
| Typical service life | 4-6 years |
| Cost per year | ~$33-59 |
| Core charge | ~$22 (refundable) |
Expect roughly $200-235 for an EFB (enhanced flooded) battery in Group 35, which is what this car takes. Over a typical 4-to-6-year service life that works out to about $33-59 a year.
This one is the exception for the brand: none of the 2015-and-newer Subaru vehicles we hold specs for use AGM, so most Subaru owners are in the cheaper flooded bracket - but this configuration is not, and a flooded battery is not the right part for it.
See the full breakdown of what car batteries cost - by type, by make, and what the extras actually add.
This car needs the battery registered
This car came with an EFB battery, which usually means a smart charging system. Registration is most strictly required on European makes, but plenty of stop-start vehicles from other brands still want a battery reset or relearn after a replacement. Worth two minutes checking before you fit one.
How battery registration works - what it does, and how to have it done.
What Group 35 means
A BCI group number describes the battery's physical size and terminal layout, not its power. It is what guarantees the battery drops into the tray and the cables reach the right posts. A Group 35 case measures roughly 230 × 175 × 225 mm. Standard-terminal layout.
Group 35 is one of the most common battery sizes on the road: it is the 3rd most common of the 30 sizes across every vehicle we hold specs for, fitted to 13.5% of them. Every store stocks it, and you will never struggle to find one.
How many cold cranking amps?
Aim for 540 CCA at minimum. Cold cranking amps measure how much current the battery can deliver at 0°F, which is the one moment a battery is really tested. The 540-640 range reflects the different batteries fitted across this vehicle's trims and options. Going above the OEM rating is safe and does no harm - the starter draws what it needs and no more, so a higher-CCA battery is not "too strong" for the car. It is worth paying for if you park outside in a cold climate, and largely wasted money if you do not. Going below 540 is the one thing to avoid, because that is where hard winter starts come from.
How long it should last
An EFB (enhanced flooded) battery typically lasts 4 to 6 years. Heat is what kills batteries, not cold - cold just exposes one that was already failing, which is why so many die on the first freezing morning after a hot summer. Short trips that never fully recharge it shorten its life too. Once this battery passes its third year, get it tested annually rather than waiting to be stranded.
The warning signs are worth knowing because they are easy to miss: cranking that sounds slower than it used to, headlights that dim at idle and brighten when you rev, or a car that starts fine every day until the first cold morning and then does not. A battery rarely warns you twice.
Frequently asked
What size battery does a 2020 Subaru Ascent take?
The 2020 Subaru Ascent uses a BCI Group 35 battery, rated around 540-640 cold cranking amps.
Does the 2020 Subaru Ascent need an AGM battery?
No - it comes with a efb battery from the factory. You can usually upgrade to AGM in the same Group 35 size, but it isn't required.
How many cold cranking amps (CCA) does it need?
Aim for roughly 540-640 CCA. Choosing at or above the OEM rating is fine; going below can cause hard starts in cold weather.
Where is the battery located on a 2020 Subaru Ascent?
Check the engine bay first - that is where most vehicles carry the battery. Be aware that some models put it in the trunk or under a seat instead (many BMW and Mercedes-Benz models, plus the Chrysler 300 and Dodge Charger, among others), so if the engine bay has none, look there or in your owner's manual. Standard-terminal layout.
How much does a 2020 Subaru Ascent battery cost?
Expect roughly $200-235 for an EFB (enhanced flooded) battery in Group 35, which is what this car takes. Over a typical 4-to-6-year service life that works out to about $33-59 a year.
Does a 2020 Subaru Ascent battery need to be registered?
This car came with an EFB battery, which usually means a smart charging system. Registration is most strictly required on European makes, but plenty of stop-start vehicles from other brands still want a battery reset or relearn after a replacement. Worth two minutes checking before you fit one.
How long should a 2020 Subaru Ascent battery last?
An EFB (enhanced flooded) battery typically lasts 4 to 6 years. Heat is what kills batteries, not cold - cold just exposes one that was already failing, which is why so many die on the first freezing morning after a hot summer. Short trips that never fully recharge it shorten its life too. Once this battery passes its third year, get it tested annually rather than waiting to be stranded.
Other vehicles that use Group 35
See all cars that take a Group 35 battery →Group 35 is one of the most common battery group sizes in the US.
More verified specs for your 2020 Subaru Ascent
Other vehicles that use a Group 35 battery
Group 35 is a common size, so the same battery fits many other vehicles - including: