GarageDex

2018 Subaru Outback Battery Size

The 2018 Subaru Outback uses a BCI Group 25 battery (Group 35 also fits), rated about 550-640 cold cranking amps (Flooded).

BCI Group Size25also fits Group 35The case-size code that sets the physical fit and terminal layout.Verified fit
Battery type (OEM)
Flooded
Cold cranking amps (CCA)
550-640
Terminal position
Standard-terminal layout
Dimensions (L×W×H)
230×175×225 mm
Location
Under the hood (engine bay)

Group 24/34 are drop-in substitutes. Always confirm against your owner's manual or current battery label.

Verified fitLast checked
Sources: AutoZone
It comes with a standard flooded battery. You can usually step up to an AGM in the same Group 25 for longer life, but it isn't required. A 550-640 CCA rating is typical for this class. Matching or slightly exceeding the OEM figure is fine; going below it risks hard starts in winter. Group 25 defines the case size and terminal layout (standard-terminal layout), so any reputable Group 25 battery will fit the tray and connect correctly. Some trims or engines use Group 35 instead, so always confirm against the label on your current battery.

Where to buy a Group 25 battery

A car battery is heavy and expensive to ship, so buying in person (Walmart, Costco, or a local auto-parts store) often beats online once you count free installation and the core-charge refund on your old battery. To compare prices and reviews online:

Search Group 25 batteries on Amazon550+ CCA, Flooded

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Frequently asked

What size battery does a 2018 Subaru Outback take?

The 2018 Subaru Outback uses a BCI Group 25 battery (Group 35 also fits), rated around 550-640 cold cranking amps.

Does the 2018 Subaru Outback need an AGM battery?

No - it comes with a flooded battery from the factory. You can usually upgrade to AGM in the same Group 25 size, but it isn't required.

How many cold cranking amps (CCA) does it need?

Aim for roughly 550-640 CCA. Choosing at or above the OEM rating is fine; going below can cause hard starts in cold weather.

Where is the battery located?

Under the hood (engine bay). Standard-terminal layout.

Other vehicles that use Group 25

See all cars that take a Group 25 battery →
2013 Chevrolet Impala2012 Chevrolet Impala2011 Chevrolet Impala2010 Chevrolet Impala

Also check the wiper sizes for your 2018 Subaru Outback →