In-Depth Review of the Diono Radian 3RXT Safe+ (2023)

Reliable, Safe, and Slim for Multiple Kids

Last Updated on 2023-11-22

This comprehensive review will provide an in-depth look at the Diono Radian 3RXT Safe+. We'll analyze the key features, real owner experiences, who this seat is ideal for, and technical specifications to help you determine if this is the right car seat for your family.

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In stock
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Offers robust safety features and long-term usability, justifying its price.


Steel-reinforced frame and comprehensive protection measures are a standout.


The 12-position headrest and machine-washable cover add notable convenience.


Installation and reassembly, especially of the seat cover, are noted as challenging.


The machine-washable cover is practical, but reinstallation can be cumbersome.


Its narrow design is ideal for fitting multiple car seats in a vehicle.

Key Information

Type Convertible

Rear-Facing Forward-Facing High Back Booster Backless Booster
Weighted Rating 4.58 / 5.0

Product Overview

The Diono Radian 3RXT Safe+ Car Seat

The Diono Radian 3RXT Safe Plus is a convertible car seat designed to offer a balance of safety, comfort, and convenience. It is particularly well-suited for families with multiple children, as its slim design allows for fitting three car seats across in most vehicles. This seat is known for its robust safety features, including a steel-reinforced frame and EPS foam for side-impact protection.

Key Features

What features set this car seat apart from others?

  • 12-Position Adjustable Headrest: Enhances comfort and safety for growing children.
  • Steel-Reinforced Frame: Offers robust protection in the event of a collision.
  • Slim Design: Ideal for fitting multiple car seats in a single row.
  • EPS Foam for Side-Impact Protection: Additional safety feature for side impacts.
  • Machine-Washable Cover: Facilitates easy cleaning.

What Real Owners Think

Here's what actual owners of the Diono Radian 3RXT Safe+ had to say based on hundreds to thousands of reviews we've analyzed from Walmart, Target, and Amazon.

Pros Cons
  • Slim Design for Multiple Seats: "Fitting three car seats across in my van, the Diono Radian 3R SafePlus is a lifesaver."
  • Comfortable for Children: "12-position headrest...provides a level of comfort that's unmatched."
  • Robust Safety Features: "Steel-reinforced frame, EPS foam for side-impact protection, and a five-point harness system."
  • Machine-Washable Cover: "The machine-washable cover, making cleanup a breeze."
  • Durability: "The vehicle was demolished, the car seat however was completely intact without a scratch on it."
  • Complex Seat Cover Installation: "Installing this RXT Safety + car seat cover after almost impossible."
  • Space Consumption in Rear-Facing Mode: "When rear-facing, there is not room for even a person my size (5’2”) to fit in the front seat."
  • Limited View for Driver: "The large headrest of the car seat 100% blocks that back passenger window."
  • Headrest Adjustment Issue: "The headrest does adjust but often slides down during travel."
  • Size Limitations for Older Children: "My daughter is only seven and she is already too tall for this seat."

Who Should Buy the Diono Radian 3RXT Safe+?

This car seat is ideal for families with multiple children who need to fit several car seats in one row. Its slim design makes it a practical choice for smaller vehicles. Parents prioritizing top-tier safety features and long-term usability would find this car seat appealing. However, it might not be the best choice for families who frequently need to remove and clean the car seat cover, or for those with older, taller children.

Final Verdict

The Diono Radian 3RXT Safe Plus is a strong contender in the car seat market, especially for parents who need to maximize space. Its safety features and durability are commendable, though its complex installation and reassembly could be a significant drawback for some. It is an excellent choice for parents of multiples or those with smaller cars, but might not be suitable for families with older children or those looking for a hassle-free cleaning experience. The balance of safety, comfort, and space efficiency makes it a worthy investment, but prospective buyers should weigh the potential difficulties of installation and adjustment against these benefits. ​


Allowable Height and Weight Ranges

Height Range Weight Range
Rear-facing 18 - 44 inches 4 - 50 pounds
Forward-facing 30 - 57 inches 22 - 65 pounds
Booster 40 - 57 inches 40 - 120 pounds

Dimensions and Weight

Width 17.0 inches
Height 28.5 inches
Depth 16.0 inches
Weight 30.6 pounds

Core Specifications

Model Year 2018
Made In China
Frame Material Reinforced Steel

Safety and Compliance

Federal Safety Standards Meets all standards
Configurations FAA-Approved for Airplanes Forward-Facing
High Back Booster
Backless Booster
NHTSA Ease-of-Use Ratings
These ratings let you compare how easy it is to use certain car seat features. They are not a reflection of car seat features being better or safer.
Rear-Facing Mode
Overall 3 out of 5 stars
Labels 1 out of 5 stars
Instructions 4 out of 5 stars
Securing 2 out of 5 stars
Installation Features 4 out of 5 stars
Forward-Facing Mode
Overall 3 out of 5 stars
Labels 1 out of 5 stars
Instructions 3 out of 5 stars
Securing 3 out of 5 stars
Installation Features 5 out of 5 stars
Booster Mode
Overall 1 out of 5 stars
Labels 1 out of 5 stars
Instructions 2 out of 5 stars
Securing 1 out of 5 stars
Installation Features 5 out of 5 stars
Previous Recalls This car seat has never been recalled.


Attachment Methods LATCH
Harness Type 5-Point
Cup Holders Has cup holders.

Warranty and Durability

Manufacturers Warranty Length 1 year
Lifespan 10 Years

Additional Links

See all Diono car seats
See all Convertible car seats

Current Price Seller
In stock
$259.99 Shop