Diono Cambria 2 XL
Safety notice: NHTSA recall 21C-002 covers the Cambria 2 (models 31200-US-01, 31201-US-01 and 31202-US-01), where a crack can form between the headrest and backrest in a crash. It does not name the Cambria 2 XL. Diono supplies a free replacement backrest and headrest. Check your seat's model number and date of manufacture at nhtsa.gov/recalls.
Pros
- Extra-wide seating area for larger children
- Six-position headrest on one rear lever
- Two swing-out cup holders
Cons
- Flexible LATCH, so you tighten the front straps yourself
- Broad shoulders add to the seat footprint
Our Verdict: Diono Cambria 2 XL
The Diono Cambria 2 XL scored 72 out of 100 across the three criteria we score every booster seat on, and took Best for Bigger Kids in our booster seat guide.
Room is what it offers. The seating area measured 15.5 in across by our testers' tape, so a larger child had space that narrower boosters didn't give, and two deep cup holders swing out of the way.
The LATCH is the flexible kind, so you tighten the front straps yourself, and the broad shoulders mean it takes more row space than a slim booster.
Our Analysis, Comparisons and Test Results
Crash test
7 out of ten. Solid structural performance with consistent force mitigation.
Weight & size
7 out of ten. About 12 lb with a broader shoulder profile.
Quality
7.5 out of ten. A high-density plastic shell with a machine-washable, double-walled fabric cover.
Should You Buy the Diono Cambria 2 XL?
Choose it for a large or stockier child, or for a booster you expect to last for years.
If your back row is tight, the Alta V2 is far narrower.
Because every booster seat here met the same three criteria, a low column is a trade-off rather than a defect. Work out which column you would notice, then buy on that.
What Other Car Seats Should You Consider?
We scored the Diono Cambria 2 XL against ten other booster seats on the same criteria. The three closest on score:
| Compare | Score | Award | Tested in |
|---|---|---|---|
| Diono Cambria 2 XL (this review) | 72 | Best for Bigger Kids | Best Booster Seat 2026: 11 Seats Compared |
| Peg Perego Viaggio Flex 120 | 72 | Best Folding Booster | Best Booster Seat 2026: 11 Seats Compared |
| Graco TurboBooster 2.0 | 72 | Best No-Frills High-Back | Best Booster Seat 2026: 11 Seats Compared |
| Britax Grow With You ClickTight | 73 | Best Harness-to-Booster Seat | Best Booster Seat 2026: 11 Seats Compared |
| Maxi-Cosi RodiSport | 73 | Best Straightforward Booster | Best Booster Seat 2026: 11 Seats Compared |
| BubbleBum Inflatable Booster | 68 | Best Travel Booster | Best Booster Seat 2026: 11 Seats Compared |
Specifications
| Type | High-back booster, converts to backless |
|---|---|
| Weight | About 12 lb (our testers' figure) |
| Child limits | 40–120 lb |
| Install | Flexible LATCH connectors |
Conclusion: Diono Cambria 2 XL
The Cambria 2 XL took the bigger-kids award with 72. Its marks sit at 7 and 7.5 across the board, so it's a steady performer.
Our booster seat guide puts this score beside every other booster seat we scored, with the full comparison table.
Tested against 10 other car seats in Best Booster Seat 2026: 11 Seats Compared. See all car seats guides and reviews.