SeatFitFindercar seats, by spec

Diono Monterey 4DXT vs Chicco GoFit Plus

Both are booster car seats — here are their published manufacturer specs side by side.

This compares published manufacturer specs — not safety or fit advice. The seat's manual, your vehicle's manual, NHTSA's tools and a certified CPST are the fit-and-safety authority; always check them before installing.

SpecDiono Monterey 4DXTChicco GoFit Plus
StageBoosterBooster
Narrow (3-across)✓–
Extended rear-facing––
FAA-approved––
Lightweight / travel–✓

Diono Monterey 4DXT

40–120 lb

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Chicco GoFit Plus

40–110 lb

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As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Weight ranges are the manufacturer's published limits across all modes.

How they differ

Published limits

ModeDiono Monterey 4DXTChicco GoFit Plus
Booster (with back)40–120 lb · 38–63 in40–110 lb · 38–57 in · 4+ yrs
Booster (backless)40–120 lb · 38–63 in40–110 lb · 38–57 in · 4+ yrs
Useful life8 yrs from purchase—

Diono Monterey 4DXT: Belt-positioning booster convertible between high-back and backless mode (identical weight/height requirements printed for both — no per-mode split found in manual). No age requirement printed. Expired over 8 years from date of purchase (printed number, per manual).

Chicco GoFit Plus: The manual states one range for the seat (40–110 lb, 38–57″, 4+) across highback and backless use. Useful life is set by a “Do Not Use After” date on the label, not a printed number of years.

Printed verbatim in the manufacturer's manual (Diono Monterey 4DXT 2-in-1 High-Back Booster Seat Instruction Manual · Chicco GoFit Plus); “—” = not published for that mode, “not yet sourced” = we haven't read that manual yet, not that the seat has no limit. How we source these →

Recall record

Diono — 2 on NHTSA's record · Chicco — 2 on NHTSA's record.

That is the record of the brand — not a verdict on these models. A recall names specific models and manufacture-date ranges, and a seat missing from the record is not "recall-free": check nhtsa.gov/recalls with the model and date of manufacture on your seat's label. Source: NHTSA, retrieved 2026-09-05.

Where to buy

Diono Monterey 4DXT

See price on Amazon

Chicco GoFit Plus

See price on Amazon

Need it before the due date or a trip? Amazon Prime includes fast delivery on eligible items, and eligible new members may be offered a free trial. Delivery speed and return terms vary by item, so check the listing in case a seat may not fit your car. See if you can try Prime free →

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As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which seats we compare.

FAQ

What's the difference between the Diono Monterey 4DXT and the Chicco GoFit Plus?
The Diono Monterey 4DXT is narrow for 3-across; the Chicco GoFit Plus is lightweight/travel. Both are booster car seats.

Which fits three across, the Diono Monterey 4DXT or the Chicco GoFit Plus?
The Diono Monterey 4DXT is listed narrow (~≤17″) for 3-across; the Chicco GoFit Plus isn't. Three-across fit still depends on your exact vehicle — confirm before buying.

Which is right for my car and child, the Diono Monterey 4DXT or the Chicco GoFit Plus?
That depends on your specific vehicle and child — this page compares published manufacturer specs only, not fit or safety. Check the seat manual, your vehicle manual, NHTSA's car-seat finder and ideally a certified CPST before deciding.

Citing these specs? Go ahead — published manufacturer data, last verified 2026-06-11. Copy a ready-made reference:

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