Radian 3QXT › fit in › Toyota Tacoma Double Cab

Will the Diono Radian 3QXT fit in a 2016–2024 Toyota Tacoma Double Cab?

Yes — the Diono Radian 3QXT fits a 2016–2024 Toyota Tacoma Double Cab, with a caveat.
The Radian 3QXT is about 17" wide; the Tacoma Double Cab's usable rear bench is about 52". It fits one rear position comfortably. Three even fit across the back (51" needed vs 52"). Note: rear legroom here is limited, so a rear-facing install may crowd the front passenger.

17"Radian 3QXT width

52"Tacoma Double Cab rear bench

Yesthree across

★★★☆☆NHTSA Ease-of-Use

Check the Radian 3QXT on Amazon → All seats for a Tacoma Double Cab

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What fits this Tacoma Double Cab

One seat, rear position: Yes. The Radian 3QXT installs in an outboard rear position of a 2016–2024 Toyota Tacoma Double Cab, though you may slide the front seat forward for rear-facing.
Three across: Yes — three need ~51" against a ~52" bench. Test-fit; three-across is decided by half-inches.
Modes this seat covers: rear-facing → forward-facing → booster.
LATCH: lower anchors up to 40 lb; the Tacoma Double Cab has 3 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 Radian 3QXT's width (Diono published spec (17 in)) and the Tacoma Double Cab's rear-bench width (Toyota dimensions + owner measurements (approx); midsize crew cab, upright rear) are both approximate — confirm with a test-fit before buying.

Common questions

Will the Diono Radian 3QXT fit in a 2016–2024 Toyota Tacoma Double Cab?

Yes — the Diono Radian 3QXT (17" wide) fits a single rear seating position in a 2016–2024 Toyota Tacoma Double Cab. Because this vehicle has limited rear legroom, a rear-facing install may require sliding the front seat forward. Three of them also fit across its roughly 52" rear bench.

Can you fit three Radian 3QXTs across a Tacoma Double Cab?

Yes — three Radian 3QXTs need about 51" and the Tacoma Double Cab's usable bench is about 52". It's close, so test-fit before buying.

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.