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The Best Diono Car Seats Reviews

Joanne Stene
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by Joanne Stene

As anyone who has children will tell you they are very expensive to maintain! Providing safety in the car for our young ones is paramount and not optional. That said, it does remain costly.

If you’re buying a separate car seat for every stage of growth, then you’re going to be spending a lot of money on something that will only last a couple of months at best.

Instead, consider an all-in-one convertible car seat that will accompany your child through every stage until they grow out of booster seats entirely.

In this article will be taking a look at some of our top picks of Diono car seats and why you should consider adding one to your vehicle for your child.

Diono Car Seat Reviews

1. Diono Radian 3R

The Diono Radian is an all-in-one convertible car seat that has the capability of fitting three children in the back all at once with the same car seat.

It can handle weights from birth up to 100 pounds, which makes it an ideal choice if you believe in keeping your child in an extended seat.


  • Fully convertible car seat
  • Extended rear-facing abilities
  • Steel alloy frame
  • Machine washable fabrics
  • Small enough to fit three in a single car side by side.

One of the most significant benefits that this car seat provides for you and your child is the fact that it allows you to have an extended rear facing experience which has been showing through studies to ensure better safety for your child.

Not only do you get great practicality out of the booster seat, but it’s a stylish and modern look that has a soft fabric to keep your child comfortable in their chair while you’re in your car. The material is also absorbent and easy to clean.

When your child spills, all you have to do is detach it from your car seat and toss it in the wash on a delicate setting.

The car seat itself comes engineered with a steel alloy frame that ensures your child’s safety and gives you peace of mind while you’re on the road. Additionally, this car seat has reinforced memory foam built into its accommodation as well as aluminum side walls and EPS foam to handle the impact that occurs when you get into an accident.

Thanks to the safeguards that are always present around your child when they are in their seat, your child won’t have as many injuries because the foam will protect them.

The super-LATCH technology that Diono puts into their car seats helps by letting parents know that the car seat is secured because they will be able to hear an audible click when their car seat got adequately latched.

There’s also a non-slip rubber base at the bottom which ensures that your car seat will not move in the event of the car getting jarred suddenly.

  • Steel alloy frame
  • Can accommodate children up to 100 pounds
  • Children can unbuckle the chest clasp
  • Can be difficult to install in the rear-facing position

2. Diono Radian 3RXT

With weight ranges going all the way up to a hundred and twenty pounds for the car seat limit and over 12 adjustable headrest positions, this all-in-one convertible car seat would be perfect for a child that you fully intended to keep in a booster until they were much too old to sit and want any further.


  • Side impact protection
  • Aluminum siding and reinforced head support
  • Supports rear-facing riding up to 45 pounds
  • Washable fabric

With over 12 color choices to choose from the Diono radian 3 RTX is the all-in-one convertible car seat that you need for your child. This model , in particular, supports rear-facing writing until they reach 45 pounds, and you can continue using this seat until your child reaches 120 pounds total. It comes with approval from the FAA for air travel.

This car seat is the chair that grows with your child, providing you with over 12 different head sizes and shoulder sizing adjustments, but you can Implement in anytime, especially if your child is a fast grower.

Additionally, the material is highly absorbent and easily removed for cleaning purposes. Just throw the fabric in the washer under a delicate setting, and once it’s dried, it can get reattached easily. This feature is perfect for busy moms who struggle to find enough time to keep things clean, and the convenience that this feature presents is perfect for working mothers.

It comes designed with a steel alloy frame which keeps it sturdy and robust enough to handle just about any impact that you throw at it. On top of that, it also features aluminum protection panels on either side of the car seat as well as on the headrest of the car seat.

There are aluminum side protectors as well as the impact foam manufactured in the car seat will provide your child with a safe and comfortable ride, and it keeps them from getting injured during an accident.

  • Reinforced frame for protection
  • EPS foam for protection
  • Easy to adjust to your child’s growth
  • Handles children up to 120 pounds
  • Difficult to install two or three close together
  • Adjustments can take too much time

3. Diono Everett NXT High Back Booster

The Diono Everett in XT is a high-back booster seat made for children between the weights of 40 pound all the way up 120 pounds.


  • Weighs 8.9 lbs.
  • 7-position adjustable headrest
  • Ergonomic design
  • For children ages 4-12 years
  • Lightweight and comes with LATCH connectors

The Diono Everett has seven different settings to place your child’s headrest for comfort as well as a comfortable plush fabric cover. The cover is absorbent and allows a parent to remove the cover easily should an accident happen along the way.  You can wash the material in your washing machine and then slipping it back on is as easy as taking it off.

The foam comes made of an impact-absorbent material that protects your child in the event of an accident. This protection is pushed further with the lightweight aluminum that’s built with the frame to resist side impact damage as much as possible.

With the LATCH feature, you will be fully aware that your seatbelt is working by listening to the sound of a click which indicates that your car seat got installed correctly.

  • Lightweight
  • Seats kids up to 12 years old
  • LATCH system makes it easy to install
  • Not made with EPS foam
  • Only has seven headrest position instead of 11.

4. Diono Monterey XT Booster

With the Diono Monterey , you get a high-back and a backless booster for the price of one. It comes in four different colors to choose from, and it carries on the safety and durability of all Diono car seats.


  • 11-position headrest
  • Easy to install
  • Cup holders
  • Grows with your child from 40 pounds to 120 pounds

This car seat it’s perfect for children who have already hit the 40-pound mark and need a secure booster seat to carry them on throughout the rest of their growth. Overall, it can handle children up to 120 pounds.

Thanks to the adjustable knob in the back of your seat, you’ll be able to utilize over 11 different headrest positions and other adjustments necessary to give your child the proper fit that they need while they’re sitting in their booster seat. The dial on the back is easy to use, and it takes no time at all to set up the position that best fits your child.

The dial does more than adjust the headrest; it also allows you to expand the width of the seat up to 20 inches. Overall, this car seat is lightweight as well making it easy to Port around where you need it and when you’re done using it, you can easily store it away where it won’t be in the way until you need it again.

Aside from that, car seats easy to install and it only takes a couple of seconds to do thanks to the latch system that’s present within the build of the car seat. The Monterey XT it doesn’t have to strictly be set as a front facing full backed car seat and can have the back taken off to accommodate your child and your needs.

As far as protection is concerned, there are aluminum reinforced sides like it is reasonable for these forms of car seats buy Diono. This one even includes the EPS foam to absorb the impact of an accident or collision.

  • Has aluminum siding to reinforce the seat
  • EPS foam protects the child in the event of an accident
  • 11 adjustable headrest positions
  • The base may be too wide for some people’s vehicles
  • Not a fully convertible all in one

5. Diono Rainier

Coming in with two different colors is the Diono Rainier all-in-one convertible car seat. Like the Radian car seat, this model allows children to stay rear-facing up to 45 pounds, which creates a safer environment in the long run.


  • Supports longer rear facing time
  • Easy to install
  • Easy for your child to get into
  • Steel reinforced
  • Folds flat for travel

The Diono Rainier is extremely easy to put together things to the implemented latch system that they have in all of their products. All you have to do is make sure that this chair is appropriately situated and then listen for that specific click sound to ensure that those car seats get strapped in securely. It takes just minutes to do, and then you’re ready to drive with your child.

Because of how the chair comes made, it’s low sitting enough that your child will be able to crawl in and out of their seat once they’re old enough to manage that on their own. It makes it easier for busy parents to get their child in their car seat and get them buckled up without much hassle or concern.

As is the case with all Diono car seats, this one has a steel alloy frame that helps protect both your child and the car seat from damage if an accident were to happen.

If you no longer needed your car seat or you needed to take it with you, the car seat can fold into a flat area which allows you to carry it wherever you need to use the straps located on the back to transport it.

Because it lies flat, you can easily store it away when you’re no longer using it.

  • Easy to store
  • Steel reinforced for safety
  • Easy for your child to use
  • Cup holders
  • Its size may not be compatible with specific car models.
  • The car seat is bulky

What Should You Look Out For?

When you’re out shopping for the perfect car seat for your child, there are a few considerations that you must keep in mind when you are making your decision.

First of all, you want to make sure that your car seat will grow with your child, not only does this provide you with savings down the road, but it also means that you can trust your car seat to provide your child with the safety requirements that they deserve.

Secondly, you want to make sure that the fabric is easy to wash and pull off of the chair. Everyone makes mistakes, including young children with juice boxes; however, with a suitable material present in their car seats, it won’t take much to get the stain out of the fabric.

Finally, you want to make sure that your child is comfortable. Children can be very fussy about their harnesses, especially if it’s rubbing up against their neck and shoulders. Making sure that their harness is adjusted correctly, and that is a comfortable fit, to begin with, will ensure that your child will be happier with their car seat situation enough to keep them safe.


In conclusion, we feel that the better car seat out of this list is the Diono Rainier all in one convertible car seat. It matches a lot of the things to look out for in a car seat presented just above, and it’s stylish and functional as well.

While it may not fit in all car types, we like the fact that it also follows your child through all the stages in their lives.

Other Car Seat Brands to consider:

About Joanne Stene
Joanne Stene
Joanne is a mother of 2 young girls and a technical writer with over 20 years of professional experience. She originally got interested in the topic of car seats as her two daughters were born and during the course of research into which seats to buy for her family. That interest has turned into a passion of sharing information on the Elite Car Seats website.
Joanne Stene
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