Product Dimensions | 16.1 x 20.5 x 27.2 inches |
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Item model number | 10831 |
Is Discontinued By Manufacturer | No |
Target gender | Unisex |
Minimum weight recommendation | 40 Pounds |
Maximum weight recommendation | 120 Pounds |
Minimum height recommendation | 38.2 Inches |
Maximum height recommendation | 63 Inches |
Material Type | Polypropylene, High Density Polyethylene, Metal |
material_composition | 92% Polyester, 8% Spandex |
Care instructions | Covers: Machine wash cold, line dry. Shell and Components: Spot clean |
Additional product features | 15 upgrades from Monterey XT |
Number Of Items | 1 |
Style | Monterey 4 DXT Latch |
Number of reclining positions | 11 |
Batteries required | No |
Orientation | Forward Facing |
Forward-facing minimum child weight | 40 Pounds |
Forward-facing maximum child weight | 120 Pounds |
Harness type | 3-Point |
Item Weight | 18.7 pounds |
Add to your order

- NO ADDITIONAL COST: You pay $0 for repairs – parts, labor and shipping included.
- COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
- PRODUCT ELIGIBILITY: Plans cover products purchased in the last 30 days.
- EASY CLAIMS PROCESS: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
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Diono Monterey 4DXT Latch, 2-in-1 High Back Booster Car Seat with Expandable Height, Width, Advanced Side Impact Protection, 8 Years 1 Booster, Gray Dark
- You can return this item for any reason: no shipping charges. The item must be returned in new and unused condition.
- Read the full returns policy
- Go to Your Orders to start the return
- Print the return shipping label
- Ship it!
Enhance your purchase
Brand | Diono |
Installation Type | Seat Belt |
Material | Polypropylene, High Density Polyethylene, Metal |
Color | Gray Dark |
Orientation | Forward Facing |
About this item
- NEXT GENERATION BOOSTER SEAT 15 safety and style upgrades from the Monterey XT. Ensure protection, comfort and style with the new automotive inspired fabrics that cover the entire vehicle seatback
- 3 LAYER SIDE IMPACT PROTECTION Reinforced high impact aluminium that provides 3 layers of enhanced side impact protection for head, shoulders and torso
- BREATHABLE SIDE PANELS Designed with breathable exo-shell side panels to enhance airflow and keep your child cool on the move
- EXPANDABLE HEIGHT & WIDTH Provides 69% increase in occupancy space as your child grows for a high back booster seat. Providing comfort and safety for your childs car ride
- 2 SEATS IN 1 Easily converts into a backless booster seat, with wide contoured seat base and two retractable cup holders
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Frequently bought together
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4 stars and above for durability
- Graco SlimFit 3 in 1 Car Seat, Slim & Comfy Design Saves Space in Your Back Seat, AnnabelleAmazon's Choicein Child Safety Booster Car Seats
From the manufacturer


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4 Layer Side Impact Protection
4-layer side impact protection using interlocking EPS & EPP foam
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11 Position Headrest
One hand easy adjust 11-position headrest
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2-in-1 Cup & Holder
2x retractable space-saving cup holders to neatly store drinks and snacks
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Expandable - 69% Occupancy Increase
Original expandable booster with 69% increase in occupancy




Product Description
We’ve taken the award-winning Monterey and painstakingly engineered 15 upgrades to create the next generation of boosters. From the remodeled headrest, enhanced fabric covering, contoured seat base and breathable exo-shell panels, we’ve considered every last detail to create a contemporary new look. Contoured to fit and shaped in harmony with your child, Monterey 4 DXT latch adjusts and expands as your little one grows to offer wonderful all-round protection. The height and width can be adjusted independently for safety that envelopes their head and shoulders up to 12 years of age. A simple-to-use dial on the back adjusts the width of the seat to fit a child’s shoulders up to 20” wide, while the headrest adjusts up to 6.4” height with one hand for an easy precise fit. The remodeled headrest is lined with thick EPP foam for better child comfort and improved side impact performance. This is combined with deeper side wings and Diono 3-layer Side Impact Protection System built in. From the EPP foam coating, to the molded rigid shell casing and EPS coated outer shell, we’ve lovingly engineered every detail to keep your little one safe, mile after mile. Here at Diono we don’t just stop at superior safety. The ergonomically contoured seat base improves the child seating position with luxury AIRTEK foam cushioning for total child comfort. We’ve even added breathable exo-shell side panels to enhance airflow to keep them cool on the move. We've reduced the width of the vehicle seatback to make installation easier, improving access to vehicle seatbelts and promoting independent buckling. And with easily removable backrest and intuitive belt guides, the Monterey 4 DXT latch offers 2 seats in 1 when they are ready to graduate to a backless booster. Like all Diono boosters, expect up to 8 years of reliable service. So, when it comes to your next booster, look to the Monterey 4 DXT latch to take your child on their journey in safety and style
Product information
Technical Details
Additional Information
ASIN | B07VWCYL5K |
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Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #24,047 in Baby (See Top 100 in Baby) #73 in Child Safety Booster Car Seats |
Warranty & Support
Feedback
Compare with similar items
![]() This item Diono Monterey 4DXT Latch, 2-in-1 High Back Booster Car Seat with Expandable Height, Width, Advanced Side Impact Protection, 8 Years 1 Booster, Gray Dark | ![]() Diono Monterey XT Latch 2 in 1 High Back Booster Car Seat with Expandable Height & Width, Side Impact Protection, 8 Years 1 Booster, Black | ![]() Diono Monterey 5iST FixSafe High Back Booster Car Seat with Expandable Height and Width, Compact Fold to Full Size Booster, Foldable, Portable Booster for Go-Anywhere Travel, Gray Slate | ![]() CYBEX Solution B-Fix High Back Booster Seat, Lightweight Booster Seat, Secure Latch Installation, Linear Side Impact Protection, 12-Position Adjustable Headrest, for Kids 40-120 Lbs. | ![]() Britax Skyline 2-Stage Belt-Positioning Booster Car Seat, Teal - Highback and Backless Seat | ![]() Chicco KidFit Zip Plus 2-in-1 Belt Positioning Booster Car Seat - Seascape | Blue | |
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Customer Rating | 4.6 out of 5 stars (241) | 4.7 out of 5 stars (1731) | 4.6 out of 5 stars (63) | 4.5 out of 5 stars (182) | 4.8 out of 5 stars (425) | 4.8 out of 5 stars (6331) |
Price | $199.99$199.99 | $149.98$149.98 | $214.99$214.99 | $109.99$109.99 | $109.99$109.99 | $139.99$139.99 |
Sold By | GOMINIGO / GMG Motorsports | GOMINIGO / GMG Motorsports | GOMINIGO / GMG Motorsports | Amazon.com | Amazon.com | Amazon.com |
Brand Name | Diono | Diono | Diono | Cybex | BRITAX | Chicco |
Color | Gray Dark | Black | Gray Slate | Dynamic Red | Teal | Seascape |
Item Dimensions | 16.1 x 20.5 x 27.2 inches | 17.5 x 22 x 27.2 inches | 15 x 17 x 24.8 inches | 15.4 x 20.5 x 33.1 inches | 16 x 19.5 x 27.5 inches | 16.5 x 18.75 x 32.75 inches |
Size | 16.1x21.3x27.2 Inch (Pack of 1) | 16.1x19.9x27.2 Inch (Pack of 1) | 15x17.9x24.8 Inch (Pack of 1) | 1 Count (Pack of 1) | 1 Count (Pack of 1) | 16.5x18.75x32.75 Inch (Pack of 1) |
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonTop reviews from the United States
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My son was a 9lb baby and shrieked to high hell when he was placed in his infant car seat. By the time he was 3 months, I switched him into a Primo Viaggio Convertible. Then 3 years, he was switched to a Britax Pinnacle G2.1, top of the line. We were t-boned by a person looking at their phone while driving and so the Britax was replaced by a Chicco MyFit Harness LE.
My son is always in the 100 percentile range. He's tall and wide. The MyFit was no longer cutting it at 6 years old. The back is cut slim and my son kept moving side to side or leaning forward to get comfortable. In comes the Diono.
The Diono is adjustable both ways. I have it set at the widest and my son sits back and the seat hugs him. He is very comfortable and I feel he may be able to stay in this seat till about 9-10. He is 7 now and we took our time writing this review, we have had the seat for over 3 months now and my 5 year old daughter can't wait to get one of her own. She loves sitting in her brothers seat, it's a throne to them.
This seat is huge. We have a Honda Pilot and eventually the sister will get a Diono as well. So you need to have the space for this giant car seat.
Alot of reviews said this seat has no plush. This is correct.
This is no frills but the age this seat caters to no longer cares for plush, they want comfort and fit. My son loves his seat and I'm glad I found this.
I highly recommend this seat, Amazon gives a 3 month return window on this item, so if your child isn't happy, just return it.
Top reviews from other countries

The material is nice although the seat isn’t very padded, nice colour and the cup holders are a nice bonus.
Overall, a decent seat although on the pricey side for what it is, worth it for peace of mind.



Reviewed in Canada on July 27, 2021



The seat padding on the bottom is a 5/8" porous white foam, than can be easily compressed with your fingers. I wouldn't call it super comfortable, it's not memory foam or anything I would personally want to sit on for long periods of time.
HOWEVER, I looked at MANY other premium top of the line seats and the padding in the bottom is way more than what other brands are offering.... which actually surprised me that this is the best kids get.
Also, the seat belt slips out of the top holding clip sometimes, but not sure if that's a Diono design issue or the way my seat belt comes out of the center seat or if other seats like this also have that issue.
Besides the occasional belt slip from the clip and would have liked something like memory foam on the seat bottom for the price you pay (but still much better than what other premium seats offer) we are very happy with the seat.


Bought this in 2022 but the seat that came was manufactured in 2019.
It also came with a very foul odour that smelled like wet cardboard and old cheese. Even after airing it out for a couple of days, the smell was unbearable. It makes me question whether this was a previously return seat after someone vomitted on it.
The seat itself functions as advertised but the older date and bad smell required me to ask for a replacement. Amazon was prompted in resending a new seat, but if you purchase this be sure to open the box right away.