MightyFit 65 › fit in › Toyota 4Runner

Will the Cosco MightyFit 65 fit in a 2010–2024 Toyota 4Runner?

Yes — the Cosco MightyFit 65 fits a 2010–2024 Toyota 4Runner, with a caveat.
The MightyFit 65 is about 18" wide; the 4Runner's usable rear bench is about 52". It fits one rear position comfortably. Three across is tight (54" needed vs 52"). Note: rear legroom here is limited, so a rear-facing install may crowd the front passenger.

18"MightyFit 65 width

52"4Runner rear bench

Tightthree across

★★★☆☆NHTSA Ease-of-Use

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What fits this 4Runner

One seat, rear position: Yes. The MightyFit 65 installs in an outboard rear position of a 2010–2024 Toyota 4Runner, though you may slide the front seat forward for rear-facing.
Three across: Tight — three need ~54" against only ~52". A narrower seat is the better bet.
Modes this seat covers: rear-facing → forward-facing.
LATCH: lower anchors up to 55 lb; the 4Runner 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 MightyFit 65's width (Cosco published spec (~18 in)) and the 4Runner's rear-bench width (Toyota dimensions + owner measurements (approx); body-on-frame, upright rear bench) are both approximate — confirm with a test-fit before buying.

Common questions

Will the Cosco MightyFit 65 fit in a 2010–2024 Toyota 4Runner?

Yes — the Cosco MightyFit 65 (18" wide) fits a single rear seating position in a 2010–2024 Toyota 4Runner. Because this vehicle has limited rear legroom, a rear-facing install may require sliding the front seat forward. Three across is tight — its rear bench is about 52" and three of these would need 54".

Can you fit three MightyFit 65s across a 4Runner?

Probably not — three MightyFit 65s need about 54" but the 4Runner's usable bench is only about 52". Consider a narrower seat — see our narrowest-seats guide.

Sources: seat ratings & modes — NHTSA (pulled 2026-06-18); 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.