Knox › fit in › Kia Carnival
Will the UPPAbaby Knox fit in a 2022–2024 Kia Carnival?
Yes — the UPPAbaby Knox fits a 2022–2024 Kia Carnival.
The Knox is about 18.8" wide; the Carnival's usable rear bench is about 55". It fits one rear position comfortably. Three across is tight (56.4" needed vs 55").
The Knox is about 18.8" wide; the Carnival's usable rear bench is about 55". It fits one rear position comfortably. Three across is tight (56.4" needed vs 55").
18.8"Knox width
55"Carnival rear bench
Tightthree across
★★★☆☆NHTSA Ease-of-Use
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What fits this Carnival
- One seat, rear position: Yes. The Knox installs in an outboard rear position of a 2022–2024 Kia Carnival with room to spare.
- Three across: Tight — three need ~56.4" against only ~55". A narrower seat is the better bet.
- Modes this seat covers: rear-facing → forward-facing.
- LATCH: lower anchors up to 35 lb; the Carnival 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 Knox's width (UPPAbaby published spec (23.8"L x 18.8"W x 27.4-32.5"H); independent review measured 18.6 in, closely matching) and the Carnival's rear-bench width (Typical for minivan — approximate, verify install in your vehicle) are both approximate — confirm with a test-fit before buying.
Common questions
Will the UPPAbaby Knox fit in a 2022–2024 Kia Carnival?
Yes — the UPPAbaby Knox (18.8" wide) fits a single rear seating position in a 2022–2024 Kia Carnival. Three across is tight — its rear bench is about 55" and three of these would need 56.4".
Can you fit three Knoxs across a Carnival?
Probably not — three Knoxs need about 56.4" but the Carnival's usable bench is only about 55". Consider a narrower seat — see our narrowest-seats guide.
Sources: seat ratings & modes — NHTSA (pulled 2026-10-13); 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.