Free shipping on orders $50+*

Diono Monterey 4DXT Latch 2 in 1 Booster Car Seat


or 4 installments by or
SKU: MONT4DXT Categories: ,


Diono has taken the award-winning Monterey® booster seat and painstakingly engineered 15 upgrades to create the next generation of booster. Suitable from 40-120 lbs or approx. 4-12 years.

The most advanced Monterey® expandable booster seat featuring 15 upgrades in safety, comfort and style. From the remodeled headrest and enhanced side impact protection to the contoured seat base and breathable side panels, we’ve considered every last detail. Suitable from 40 – 120 lb (approx. 4 – 12 years) expect 8 years of safety from just one booster seat. Monterey® 4DXT adjusts and expands as your little one grows to offer all-round protection. The height and width are adjusted independently providing 69% increase in occupancy space as they grow. Extra deep aluminum reinforced sides and a combination of EPP and EPS foam provide 4 layers of enhanced side impact protection for their head, shoulders and torso. The ergonomically contoured car seat base improves the child seating position with luxury foam cushioning for child comfort, with two space saving cup holders that can simply fold away when not in use. So, when it comes to your next booster, look to the Monterey® 4DXT to take your child on their journey in safety and style.

Diono Montery 4DXT Booster Car Seat 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 LATCH connectors and front adjusters to securely connect the booster seat to your vehicle in seconds, enhancing safety and stability.

Diono Montery 4DXT Booster Seat User Specifications

  • Minimum – Maximum User Weight: 40-120 lbs
  • Minimum User Height: 38.2 inches
  • Maximum User Height: 63 inches
  • Minimum-Maximum User Age: 48-144 Months

Diono Monterey 4DXT Product Specifications

  • Dimensions (H x W x D): 27.2 x 20.5 x 16.8 inches
  • Product Weight: 18.7 lbs

Care and Maintenance For Your Diono Monterey Booster Seat

For the covers, machine was cold, line dry. Shell and hard components spot clean only.

Product Warranty

12 Months Standard Warranty (extended warranty available to purchase directly from Diono

Additional information

Weight 22.8 lbs
Dimensions 10.6 × 20.7 × 33.9 in

, , , , ,


There are no reviews yet.

Be the first to review “Diono Monterey 4DXT Latch 2 in 1 Booster Car Seat”

Shopping cart

Add $50.00 more to get Free Shipping*!

Your cart is feeling a little lonely

Continue Shopping

4 interest-free payments.

Buy what you love and split the cost. It's easy and interest-free.

  • Add item(s) to your cart
  • Go to checkout and choose Klarna or Afterpay
  • Enter your debit or credit card information
  • Your first payment is taken when the order is processed and the remaining 3 are automatically taken every two weeks

See payment terms. A higher initial payment may be required for some consumers. CA residents: Loans made or arranged pursuant to a California Finance lenders Law License.