Diono Connect3 R 2-in-1 High-Back Booster

A 2-in-1 booster seat with 2 modes: high-back booster 40 to 120 lb, 38 to 63 in; backless booster 40 to 120 lb, 38 to 63 in.

At a glance

  • Fits children from 40 to 120 lb
  • Up to 63 in tall
  • 2 modes: high-back booster, backless booster
  • 8-year usable life
Not sold on Amazon

Diono lists this seat on its US site. Buy from Diono or an authorized retailer, and confirm the exact model number before you buy.

Specifications checked against Diono’s US site and manual on . Not hands-on tested. How I research

Who the Connect3 R 2-in-1 High-Back Booster fits

This seat covers 2 stages, and a child has to meet every limit of the stage they are in. Diono gives it a 8-year life from the date of manufacture, so check the date label before using a hand-me-down.

High-back booster40 to 120 lb · 38 to 63 in
The seat’s own back and belt guide route the vehicle belt across the shoulder, and the sides give the child something to lean on when they sleep.
Backless booster40 to 120 lb · 38 to 63 in
Only the base is left, so the vehicle seat has to support the child’s back and head, and the belt guide sits at the hip.
A school-age child with a backpack beside an empty high-back booster

What are the Connect3 R 2-in-1 High-Back Booster weight, height and age limits?

Diono Connect3 R 2-in-1 High-Back Booster limits by mode
ModeChild weightChild heightMinimum ageConditions
High-back booster40 to 120 lb38 to 63 inNot published
Backless booster40 to 120 lb38 to 63 inNot publishedChild's ears must be below the top of the fully raised vehicle seat or headrest

A child must meet every limit for the mode they use. The labels on your seat and its manual are the final word.

Connect3 R 2-in-1 High-Back Booster specifications

Seat weight
Not published
Width
Not published
Usable life
8 years
Aircraft use
Not certified for aircraft
An empty car seat installed on a back seat, seen through an open car door

Will it fit your car?

Diono does not publish a width for this seat, so measure your back seat and compare it with the seat in a store before buying.

  • Check your vehicle manual for lower anchor positions and any head-restraint rules.
  • Rear-facing seats need front-seat room: try the install behind the driver before you commit.
  • Not certified for aircraft use: plan on gate-checking it or using a different seat to fly.

Is the Connect3 R 2-in-1 High-Back Booster recalled?

No campaign in the current NHTSA child-restraint data names this model family, and I have not run a separate review for it. Check your seat’s model number and date of manufacture before use.

NHTSA recall search · Recent car seat recalls

Before you buy

  1. Weigh and measure your child. The limits above are the manufacturer’s, and a child has to meet all of them for the mode they will use.
  2. Confirm the exact version. Colors, retail exclusives and model numbers change limits more often than you would expect.
  3. Read the manual before you buy, not after. It is linked above and holds the fit rules, the install methods and the expiry.
  4. Check recalls by model number and date of manufacture, and register the seat with Diono so you hear about the next one.

Sources

Other Diono booster seats

ModelTop child weightSeat weightWidthUsable life
Connect3 R 2-in-1 High-Back Booster (this seat)120 lb8 years
Connect3 R Backless Booster120 lb8 years
Connect3 RXT 2-in-1 High-Back Booster120 lb8 years
Connect3 RXT Backless Booster120 lb8 years
Cambria 2 2-in-1 High-Back Booster120 lb8 years
Cambria 2XT 2-in-1 High-Back Booster120 lb8 years
Everett NXT High-Back Booster120 lb8 years
Monterey 2XT 2-in-1 High-Back Booster120 lb8 years
Monterey 4DXT 2-in-1 High-Back Booster120 lb8 years
Monterey 5iST FixSafe High-Back Booster120 lb8 years
Monterey 6XT SafePlus High-Back Booster120 lb8 years
Monterey 6DXT SafePlus High-Back Booster120 lb8 years
Solana Backless Booster120 lb8 years
Solana 2 Backless Booster120 lb8 years