Diono Connect3 R 2-in-1 High Back Booster, Slim Fit 3-Across in Many Mid-Sized Sedans and SUVs, for Children from 40-120 lbs…
Best for
Best for narrow vehicles
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Based on 1 trusted source
Current price
$87.99
Updated Jun 27, 2026 · 1 min read
Sources behind this verdict
11 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Diono Connect3 R is the go-to when seating width is the constraint. safeintheseat.com measured it at 'only 16.5" wide in high-back mode and 16" wide in the backless mode,' and Diono's support documentation confirms the under-17-inch footprint without sacrificing interior space — a claim that narrow-vehicle community threads back up, with r/TeslaModelY and r/ModelY owners citing Diono seats as among the few that enable three-across. It appears in The New York Times' booster reviews coverage as well.
What reviewers liked
- safeintheseat.com measured it under 17 inches wide for genuine 3-across fit
- Narrow-vehicle community threads (Tesla, mid-size sedans) confirm the space savings
- Featured in The New York Times' booster reviews and rated for kids up to 120 lbs
Where it falls short
- r/CPST notes the non-adjustable high-back belt guide can limit fit
- Lower 4.4 Amazon average across a small 219-review base
- Community reviewers report some Diono convertibles are less long-lasting than rivals
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Across the reviewers we read, the Diono Connect3 R is the go-to when seating width is the constraint. safeintheseat.com measured it at 'only 16.5" wide in high-back mode and 16" wide in the backless mode,' and Diono's support documentation confirms the under-17-inch footprint without sacrificing interior space — a claim that narrow-vehicle community threads back up, with r/TeslaModelY and r/ModelY owners citing Diono seats as among the few that enable three-across. It appears in The New York Times' booster reviews coverage as well. The caveats are real: r/CPST notes the high-back belt guide doesn't move, so the child has to fit it as-is, and the seat carries a lower 4.4 average across a thin 219-review base.
- Fits 3-Across – Our famous slim-fit design now in a booster that’s less than 17" wide without sacrificing interior seat space. Connect3 has an innovative, patented contour around the EasyPath lap belt guides for EasyReach buckle access.
- Combined DualProtect head and backrest – Adjusts to 11 different positions, with a fastening carabiner to keep the shoulder belt in place.
- Converts to backless booster with a shoulder belt positioning clip and carry handle for safety on-the-go.
- Nap-Friendly – The SleepyCheek ergonomic headrest is perfectly angled for your child to snooze comfortably with head and neck support.
- Unmatched Comfort – With a 2-position reclining back rest and premium 2TexFoam seat base, the Connect3 prioritizes safety without compromising on comfort.
- Backseat Snacking – Includes a removable cup holder that nests between Connect3 seats to accommodate a 3-across fit and store under the booster seat when not in use or on the go.
- Breathable Design – This booster seat design features ventilation along the head and backrest to help maintain airflow in the backseat.
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You'd be buying a seat that you don't need for rear facing, the high back booster belt guide doesn't move (so you'd have to have your child fit ...
They are comfortable for the kids and for the adults sitting next to the seat. They are relatively lightweigh, airplane approved and foldable. Newborn to 10 ...
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“Diono® Connect3® | 3-Across Booster Seat” · Real Life. Real Safety.
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