Subaru Outback Battery Size (BCI Group and CCA)

Each row links to the full specification for that generation, including trim-by-trim breakdowns and the part numbers. Where engines within a generation differ, that page separates them.

The battery on a Subaru Outback is set by its generation, not its model year, so each generation has one page carrying the complete figures, part numbers and fitment notes for every year it covers.

What size battery does a Subaru Outback take?

BCI group 35 (Q85). Group size is a physical dimension and terminal-position standard, so a battery from a different group may not clamp down or may put the terminals on the wrong side.

Does the Subaru Outback need an AGM battery?

The factory battery is an EFB type. Match the type when you replace it.

Where is the battery on a Subaru Outback?

Engine bay, driver side.

Does a Subaru Outback need the battery registered after replacement?

Factory battery is a Panasonic Enhanced Flooded Battery (EFB) in a Group 35 case, needed for the standard auto start-stop system. An AGM Group 35 replacement (e.g. Optima Yellowtop, Odyssey, DieHard Platinum AGM) is commonly used and supports start-stop.