---
title: "2015-2019 Subaru Outback Battery: Group 35"
description: "The 2015-2019 Subaru Outback uses a BCI group 35 battery. Fitment, replacement notes, and what to check before you buy."
url: "https://whichcarparts.com/cars/subaru/outback/2015-2019/battery"
updated: "2026-08-21"
---

# 2015-2019 Subaru Outback Battery Size (BCI Group and CCA)

The 2015-2019 Subaru Outback uses a BCI group 35 battery. Fitment, replacement notes, and what to check before you buy.

**Quick answer**: The 2015-2019 Subaru Outback uses a Group 35 battery.

## 2015-2019 Subaru Outback battery specifications (High confidence)

| Spec | Value |
| --- | --- |
| BCI group size | 35 |
| Battery type | FLOODED |
| AGM required | No |
| Location | Engine bay, driver side |

Note: Standard flooded Group 35 battery. Class-action-covered battery-drain complaints exist for this generation. See commonProblems.

## Which Subaru Outback model years does this cover?

These battery specifications apply to every Subaru Outback built from 2015 through 2019, the BS (5th generation), mid-size wagon/crossover. Nothing in this specification changes between those model years.

- [2015 Outback](https://whichcarparts.com/cars/subaru/outback/2015)
- [2016 Outback](https://whichcarparts.com/cars/subaru/outback/2016)
- [2017 Outback](https://whichcarparts.com/cars/subaru/outback/2017)
- [2018 Outback](https://whichcarparts.com/cars/subaru/outback/2018)
- [2019 Outback](https://whichcarparts.com/cars/subaru/outback/2019)

## What changed during the 2015-2019 Subaru Outback

| Years | What changed |
| --- | --- |
| 2015 | Full redesign: all-new FB25, 3.6R moves to CVT, EyeSight driver-assist available for the first time on Outback |
| 2018 | Facelift: revised front/rear styling, updated Starlink infotainment, standard EyeSight on most trims |
| 2019 | Final year of this generation; last model year covered by the FB-engine oil-consumption settlement window |

## 2015-2019 Subaru Outback battery: common questions

### What size battery does a 2015-2019 Subaru Outback take?

BCI group 35. 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 2015-2019 Subaru Outback need an AGM battery?

The factory battery is a conventional flooded type. AGM is a valid upgrade, but never downgrade from AGM to flooded.

### Where is the battery on a 2015-2019 Subaru Outback?

Engine bay, driver side.

### Does a 2015-2019 Subaru Outback need the battery registered after replacement?

Standard flooded Group 35 battery. Class-action-covered battery-drain complaints exist for this generation. See commonProblems.

## Sources

- [sportsubarusouth.com, Subaru Outback oil type by model year](https://www.sportsubarusouth.com/subaru-research/subaru-outback-oil-type/)
- [AMSOIL lookup, 2019 Outback 2.5L FB25 oil spec/capacity](https://www.amsoil.com/lookup/auto-and-light-truck/2019/subaru/outback/2-5l-4-cyl-engine-code-fb25-4/1000/)
- [awdadventure.com, Subaru Outback tire fitment by year (2015-2019)](https://awdadventure.com/pages/lifted-subaru-tire-size-charts)
- [Rohnert Park Transmission, Subaru Outback CVT problems guide by model year](https://rohnertparktransmission.com/blog/subaru-outback-cvt-problems-guide)
- [Subaru Battery Settlement, official settlement site (2015-2020 Outback coverage)](https://www.subarubatterysettlement.com/)
- [Consumer Reports, 2015 Subaru Outback reliability (CVT complaint)](https://www.consumerreports.org/cars/subaru/outback/2015/reliability/)
- [classaction.org, Subaru windshield settlement given preliminary approval (Khona/Powell case background)](https://www.classaction.org/news/subaru-windshield-settlement-given-preliminary-approval-reimbursements-extended-warranty-available)
- [Reddit r/subaru, 2019-2020 CVT warranty extension to 10 yr/100k thread](https://www.reddit.com/r/subaru/comments/1ltsv9m/20192020_us_cvt_warranty_extension_to_10/)

## Other Subaru Outback generations

- [2020-2025 Subaru Outback battery](https://whichcarparts.com/cars/subaru/outback/2020-2025/battery)
- [2010-2014 Subaru Outback battery](https://whichcarparts.com/cars/subaru/outback/2010-2014/battery)

Or [compare all generations](https://whichcarparts.com/cars/subaru/outback/battery).

## More for the 2015-2019 Subaru Outback

- [Oil & filter](https://whichcarparts.com/cars/subaru/outback/2015-2019/oil)
- [Tires & wheels](https://whichcarparts.com/cars/subaru/outback/2015-2019/tires)
- [Wiper blades](https://whichcarparts.com/cars/subaru/outback/2015-2019/wipers)
- [Air & cabin filters](https://whichcarparts.com/cars/subaru/outback/2015-2019/filters)
- [Bulbs](https://whichcarparts.com/cars/subaru/outback/2015-2019/bulbs)
- [Brakes](https://whichcarparts.com/cars/subaru/outback/2015-2019/brakes)
- [Fluids](https://whichcarparts.com/cars/subaru/outback/2015-2019/fluids)
- [Service schedule](https://whichcarparts.com/cars/subaru/outback/2015-2019/service-schedule)
- [Problems & reliability](https://whichcarparts.com/cars/subaru/outback/2015-2019/common-problems)
- [Oil light reset](https://whichcarparts.com/cars/subaru/outback/2015-2019/oil-reset)
- [Key fob battery](https://whichcarparts.com/cars/subaru/outback/2015-2019/key-fob-battery)
- [Specs](https://whichcarparts.com/cars/subaru/outback/2015-2019/specs)

Specifications vary with engine option, production date, and market.