null
Skip to main content
Cart 0
Your Bag
  1. Home
  2. Car Seats
  3. Monterey® 4DXT
10880

Monterey® 4DXT

$299.99
Monterey® 4DXT original expandable booster [Black]
[Black]
[Black]
15 improvements since the first Monterey [Black]
4 layers of side impact protection [Black]
Breathable side panels [Black]
69% increase occupancy [Black]
Monterey® high back booster seat [Black]
Converts to backless booster [Black]
Integrated retractable cup holder [Black]
11 headrest positions [Black]
One hand width adjustment [Black]
Fully covered backrest [Black]
UAS connectors [Black]
Ergonomically contoured base [Black]
Re-modelled headrest [Black]
Monterey® 4DXT original expandable booster [Blue]
[Blue]
[Blue]
15 improvements since the first Monterey [Blue]
4 layers of side impact protection [Blue]
Breathable side panels [Blue]
69% increase occupancy [Blue]
Monterey® high back booster seat [Blue]
Converts to backless booster [Blue]
Integrated retractable cup holder [Blue]
11 headrest positions [Blue]
One hand width adjustment [Blue]
Fully covered backrest [Blue]
UAS connectors [Blue]
Ergonomically contoured base [Blue]
Re-modelled headrest [Blue]
Monterey® 4DXT original expandable booster [Gray Dark]
[Gray Dark]
[Gray Dark]
15 improvements since the first Monterey [Gray Dark]
4 layers of side impact protection [Gray Dark]
Breathable side panels [Gray Dark]
69% increase occupancy [Gray Dark]
Monterey® high back booster seat [Gray Dark]
Monterey® high back booster seat [Gray Dark]
Integrated retractable cup holder [Gray Dark]
11 headrest positions [Gray Dark]
One hand width adjustment [Gray Dark]
Fully covered backrest [Gray Dark]
UAS connectors [Gray Dark]
Ergonomically contoured base [Gray Dark]
Re-modelled headrest [Gray Dark]
Monterey® 4DXT original expandable booster [Gray Light]
[Gray Light]
[Gray Light]
15 improvements since the first Monterey [Gray Light]
4 layers of side impact protection [Gray Light]
Breathable side panels [Gray Light]
69% increase occupancy [Gray Light]
69% increse occupancy [Gray Light]
Converts to backless booster [Gray Light]
Integrated retractable cup holder [Gray Light]
11 headrest positions [Gray Light]
11 headrest positions [Gray Light]
Fully covered backrest [Gray Light]
UAS connectors [Gray Light[
Ergonomically contoured base [Gray Light]
Re-modelled headrest [Gray Light]
Monterey® 4DXT original expandable booster [Purple]
[Purple]
[Purple]
15 improvements since the first Monterey [Purple]
4 layers of side impact protection [Purple]
Breathable side panels [Purple]
69% increase occupancy [Purple]
Monterey® high back booster seat [Purple]
Converts to backless booster [Purple]
Integrated retractable cup holder [Purple]
11 headrest positions [Purple]
One hand width adjustment [Purple]
Fully covered backrest [Purple]
UAS connectors [Purple]
Ergonomically contoured base [Purple]
Re-modelled head rest [Purple]
Monterey® 4DXT original expandable booster [Yellow]
[Yellow]
[Yellow]
Monterey® 4DXT original expandable booster [Yellow]
4 layers of side impact protection [Yellow]
Breathable side panels [Yellow]
69% increase occupancy [Yellow]
Monterey® high back booster seat [Yellow]
Converts to backless booster [Yellow]
Integrated retractable cup holder [Yellow]
11 headrest positions [Yellow]
One hand width adjustment [Yellow]
Fully covered backrest [Yellow]
UAS connectors [Yellow]
Ergonomically contoured base [Yellow]
Ergonomically contoured base [Yellow]
Monterey® 4DXT original expandable booster [Red]
[Red]
[Red]
15 improvements since the first Monterey [Red]
4 layers of side impact protection [Red]
Breathable side panels [Red]
69% increase occupancy [Red]
Monterey® high back booster seat [Red]
Converts to backless booster [Red]
Integrated retractable cup holder [Red]
11 headrest positions [Red]
One hand width adjustment [Red]
Fully covered backrest [Red]
UAS connectors [Red]
Ergonomically contoured base [Red]
Re-modelled headrest [Red]
Monterey® 4DXT original expandable booster [Black]

The original expandable booster has evolved


$299.99

Become a VIP Member and earn points & exclusive rewards along your journey. Learn More

Receive perks when you sign up for VIP Rewards

Sign Up

Create a free account and get 100 points.

Earn Points

Every time you shop and share your journey.

Redeem Points

Redeem points for exclusive discounts & perks.

Bonus Points

Exclusive anniversary & birthday bonus.

Monterey® 4DXT

 

We’ve taken the award-winning Monterey® booster seat and painstakingly engineered 15 upgrades to create the next generation of booster. Suitable from 18 - 54 kg / 40 - 120 lb or approx. 4 – 12 years.

Features:

  • 15 UPGRADES FROM MONTEREY® XT - Includes automotive inspired fabrics that cover the entire booster seat back and breathable side panels to enhance airflow to keep your child cool on the move.
  • 4 LAYER SIDE IMPACT PROTECTION - Extra deep aluminum reinforced sides provides 4 layers of enhanced side impact protection for their head, shoulders and torso.
  • EXPANDABLE HEIGHT & WIDTH - 11 headrest positions and expandable side walls provides 69% increase in occupancy space as your child grows.
  • TWO SEATS IN ONE - Easily converts from a high back booster to a backless booster seat with wide contoured seat base and two retractable cup holders.
  • QUICK & SECURE INSTALLATION - Equipped with UAS (LATCH) connectors and front adjusters to securely connect the booster seat to your vehicle in seconds, enhancing safety and stability.

Product Specs

  • Minimum User Weight: 18 kg / 40 lb
  • Maximum User Weight: 54 kg / 120 lb
  • Product Height: 69 cm / 27.2 in
  • Product Width: 54 cm / 21.3 in
  • Product Depth: 41 cm / 16.1 in
  • Seat Weight: 8.48 kg / 18.7 lb
  • Maximum User Height: 160 cm / 63 in

Care & Maintenance

Covers: Machine wash cold, line dry. Shell and Components: Spot clean

Warranty Information

12 months standard warranty

Diono Monterey® 4DXT Booster - Features (US and Canada)

Monterey® 4DXT Booster, Instruction Manual, Cup Holder

Diono booster seats can be used for children weighing 40-120 lbs. (18-54 kg) and are 38-63 in. (96.5-160 cm) tall. Typically once a child reaches 5 years of age they are mature enough to ride in a booster seat.

Diono high back boosters with a detachable back are the Monterey® 4DXT, Monterey® 2XT, Cambria® 2. All come with a detachable back to convert into a backless booster seat.

Our booster seats fit 2 across in most cars. Each vehicle model is different and allows for various seating positions. Consumers should consult vehicle owners manual for appropriate car seat placement in their car that may fit more than 2 across.

Solana® comes with fabric cup holders in the cover. Solana® 2, Cambria® 2, Monterey® XT, Monterey® 2XT, and Monterey® 4DXT come with two retractable cup holders. The Monterey® 5iST FixSafe™ includes a Radian® cupholder with easy snap in installation.

The Monterey® 4DXT is recommended to be installed with the lower anchors if you vehicle is equipped with them. However, it can be used without.

Diono booster seats are not meant to be used on airplane. Boosters require a lap/shoulder belt and airplanes only have a lap belt.

All Diono booster seats have a life span of 8 years, starting from the date you purchase your seat. In the event the date of purchase cannot be determined then we use the date of manufacture.

The Diono Difference

All Diono boosters are designed and engineered to go over and above safety standards.
One thing all parents know, kids will keep on growing! Diono boosters are suitable from 18 - 54 kg (approx. 4 - 12 years) for 8 years of use.
The Diono Monterey® is the original expandable booster seat, engineered with both height and width adjustment for a custom fit at every age.
Integrated LATCH connectors and front adjusters make for a simple and safe installation every time.

Plays well with

Customers Also loved

Radian® 3R all in one convertible car seat [Gray Slate]
ROLLBACK SAVE UP TO $42.01!

Radian® 3R

$329.99
$287.98

The original 3 across All-in-One convertible car seat

Radian® 3QX all in-one-convertible car seat [Black Jet]
SAFEPLUS™ ENGINEERING

Radian ® 3QX

$529.99

The ultimate 3 across All-in-One car seat from birth to booster.

Radian® 3QXT next generation of all in-one-convertible car seat [Purple Plum]
SAFEPLUS™ ENGINEERING

Radian® 3QXT

$579.99

The ultimate 3 across 4 in 1 All-in-One car seat from birth to booster.

Reviews