Poplar › fit in › Subaru Outback
Will the Britax Poplar fit in a 2015–2024 Subaru Outback?
Yes — the Britax Poplar fits a 2015–2024 Subaru Outback.
The Poplar is about 18.5" wide; the Outback's usable rear bench is about 52". It fits one rear position comfortably. Three across is tight (55.5" needed vs 52").
The Poplar is about 18.5" wide; the Outback's usable rear bench is about 52". It fits one rear position comfortably. Three across is tight (55.5" needed vs 52").
18.5"Poplar width
52"Outback rear bench
Tightthree across
★★★★☆NHTSA Ease-of-Use
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What fits this Outback
- One seat, rear position: Yes. The Poplar installs in an outboard rear position of a 2015–2024 Subaru Outback with room to spare.
- Three across: Tight — three need ~55.5" against only ~52". A narrower seat is the better bet.
- Modes this seat covers: rear-facing → forward-facing.
- LATCH: lower anchors up to 40 lb; the Outback has 2 lower-anchor positions.
ℹ️ Informational only — built from NHTSA public car-seat ratings and published seat/vehicle dimensions. This is not a safety certification and not a substitute for the seat and vehicle manuals. Always confirm the fit and install yourself before every trip. The Poplar's width (Britax published spec) and the Outback's rear-bench width (Subaru dimensions + owner measurements (approx); a popular 3-across car) are both approximate — confirm with a test-fit before buying.
Common questions
Will the Britax Poplar fit in a 2015–2024 Subaru Outback?
Yes — the Britax Poplar (18.5" wide) fits a single rear seating position in a 2015–2024 Subaru Outback. Three across is tight — its rear bench is about 52" and three of these would need 55.5".
Can you fit three Poplars across a Outback?
Probably not — three Poplars need about 55.5" but the Outback's usable bench is only about 52". Consider a narrower seat — see our narrowest-seats guide.
Sources: seat ratings & modes — NHTSA (pulled 2026-06-17); dimensions — manufacturer specs and owner measurements. Informational only — built from NHTSA public car-seat ratings and published seat/vehicle dimensions. This is not a safety certification and not a substitute for the seat and vehicle manuals. Always confirm the fit and install yourself before every trip.