Knox › fit in › Audi A4 Allroad
Will the UPPAbaby Knox fit in a 2017–2024 Audi A4 Allroad?
Yes — the UPPAbaby Knox fits a 2017–2024 Audi A4 Allroad.
The Knox is about 18.8" wide; the A4 Allroad's usable rear bench is about 50". It fits one rear position comfortably. Three across is tight (56.4" needed vs 50").
The Knox is about 18.8" wide; the A4 Allroad's usable rear bench is about 50". It fits one rear position comfortably. Three across is tight (56.4" needed vs 50").
18.8"Knox width
50"A4 Allroad rear bench
Tightthree across
★★★☆☆NHTSA Ease-of-Use
🔗 Amazon link is an affiliate link. As an Amazon Associate we earn from qualifying purchases — at no extra cost to you.
What fits this A4 Allroad
- One seat, rear position: Yes. The Knox installs in an outboard rear position of a 2017–2024 Audi A4 Allroad with room to spare.
- Three across: Tight — three need ~56.4" against only ~50". A narrower seat is the better bet.
- Modes this seat covers: rear-facing → forward-facing.
- LATCH: lower anchors up to 35 lb; the A4 Allroad 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 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 A4 Allroad's rear-bench width (Typical for wagon — 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 2017–2024 Audi A4 Allroad?
Yes — the UPPAbaby Knox (18.8" wide) fits a single rear seating position in a 2017–2024 Audi A4 Allroad. Three across is tight — its rear bench is about 50" and three of these would need 56.4".
Can you fit three Knoxs across a A4 Allroad?
Probably not — three Knoxs need about 56.4" but the A4 Allroad's usable bench is only about 50". 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.