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3 Year Baby Protection Plan
from Asurion, LLC $21.99
  • NO ADDITIONAL COST: You pay $0 for repairs – parts, labor and shipping included.
  • COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • PRODUCT ELIGIBILITY: Plans cover products purchased in the last 30 days.
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$$199.98 () Includes selected options. Includes initial monthly payment and selected options. Details
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Diono Radian 3R, 3-in-1 C... has been added to your Cart
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3 Year Baby Protection Plan

from Asurion, LLC
  • NO ADDITIONAL COST: You pay $0 for repairs – parts, labor and shipping included.
  • COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • PRODUCT ELIGIBILITY: Plans cover products purchased in the last 30 days.
  • EASY CLAIMS PROCESS: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.

2 Year Baby Protection Plan

from Asurion, LLC
  • NO ADDITIONAL COST: You pay $0 for repairs – parts, labor and shipping included.
  • COVERAGE: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • PRODUCT ELIGIBILITY: Plans cover products purchased in the last 30 days.
  • EASY CLAIMS PROCESS: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
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Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear Facing & Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Jet Black

4.8 out of 5 stars 3,963 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Convertible Child Safety Car Seats by Diono

$199.98
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Black Jet
Radian 3R Fits 3 Across

Enhance your purchase

Brand Diono
Installation Type Latch
Material Alloy Steel, Polypropylene, Plastic, Polystyrene
Color Black Jet
Orientation Convertible Seat

About this item

  • REAR-FACING FOR LONGER: This slimfit convertible car seat is designed and engineered to keep your child rear facing even longer up to 50 lb/ 22. 7 kg, approx. 4 years old
  • HIGH BACK BOOSTER: Keep your child safe and comfortable with the high back booster seat mode now up to 120 lb, 54 kg. The high back booster adds an extra layer of protection and comfort for any child transitioning into booster mode.Shell and Components: Spot clean
  • 10 YEARS ONE CAR SEAT: With 4 ways to travel safely from birth to booster, the Radian 3R adapts as your child grows to offer a custom adjustable fit from birth to 120 lbs
  • REINFORCED STEEL CORE: Mechanically engineered, reinforced steel core, made from automotive grade high density plastic and steel to create the ultimate protection for your child
  • THE ORIGINAL 3 ACROSS: Built with our famous radian slim fit convertible design, to fit 3 across in most vehicles without compromising child or passenger comfort. Feel safe having your children secure in the backseat
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Frequently bought together

  • Diono Radian 3R, 3-in-1 Convertible Car Seat, Rear Facing & Forward Facing, 10 Years 1 Car Seat, Slim Fit 3 Across, Jet Black
  • +
  • Diono Car Seat Cup Holders for Radian, Everett and Rainier Car Seats, Pack of 2 Cup Holders, Black
  • +
  • Diono Ultra Mat Pack Full Size Car Seat Protectors For Under Car Seat, Crash Tested With Premium Ultra Thick Padding For Dura
Total price:
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From the manufacturer

Diono Radian 3R 3 Across Car Seat
Radian 3R - Diono Engineering
Diono 3 Across Lifestyle Static Banner

Product Description

The Diono Radian® 3R is the original slimfit 3 across all-in-one convertible car seat, designed to protect from baby to booster seat (5 - 120 pounds). Lovingly engineered with the famous Diono steel reinforced frame and now rear facing for even longer, expect 10 years of safety from just one car seat. Designed and engineered with complete rear facing protection, so you can keep them in a safe rear facing convertible car seat for longer up to 50 pounds. Built with a mechanically engineered, reinforced steel frame, made from automotive grade high strength steel, the radian is always ready to shield and protect. And when your family grows, the slimfit design will fit 3 across in most vehicles without compromising child safety or passenger comfort. As travel car seat experts, Diono have naturally built in super portable and convenient features to the Radian 3R with original fold for easy transport and storage and easy remove machine washable covers. The radian is also aircraft certified (FAA approved), so you can take safety with you wherever you go.

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Customer reviews

4.8 out of 5 stars
4.8 out of 5
3,963 global ratings

Top reviews from the United States

Reviewed in the United States on November 24, 2020
Color: Red CherryStyle: Radian 3R Fits 3 AcrossVerified Purchase
159 people found this helpful
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Reviewed in the United States on December 27, 2021
Color: Blue SkyStyle: Radian 3R Fits 3 AcrossVerified Purchase
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5.0 out of 5 stars Worth Every Penny
Reviewed in the United States on December 27, 2021
Diono car seats are heavy and expensive for a reason. We were in a roll over car accident before Thanksgiving. Both kiddos were strapped in their Diono seats. My 5 year old was in the 3R. He was nestled in the car seat. Side air bags went off and since this seat doesn’t have a head rest support like the 3XRT my son got a black eye from the air bags. It was small but it left a mark. He was shook up but no other injures occurred. Thank you Diono for making such a wonderful products.

No damage to the seat what so ever! Due to manufacture instructions, the car seat needed to be replaced regards if the seat looks intact.

Insurance covered the cost of a new car seat and we got the exact same one. Thanks to Amazon’s available we were able to get a new one the next day.
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99 people found this helpful
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Reviewed in the United States on September 22, 2020
Color: Blue SkyStyle: Radian 3R Fits 3 AcrossVerified Purchase
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5.0 out of 5 stars Wish I would have bought sooner
Reviewed in the United States on September 22, 2020
So I had to order 3 of these carseats and it for sure was not taken lightly as these are pricey. BUT in the end we absolutely love them. They fit perfectly in Chrysler pacifica 3rd row. First the good
--super easy to clean
--very narrow(the only issue is they are very long so if you are rear facing as you can see in the photo it sticks out alot)
--Buckles are SO easy

Cons
--i have 3 kids and have installed many a carseat. When I say these are by far the hardest I mean it. Im not sure if it was because we have so many or so close together but whatever the case this is not a carseat you Uninstall all willy nilly.
I am very happy with this carseat and if you have 3 under 2 like me, just buy it and save yourself the time of trying to make 10 other carseats fit 3 across.
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115 people found this helpful
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Reviewed in the United States on May 14, 2020
Color: Pink BlossomStyle: Radian 3R Fits 3 AcrossVerified Purchase
60 people found this helpful
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Reviewed in the United States on August 22, 2020
Color: Pink BlossomStyle: Radian 3R Fits 3 AcrossVerified Purchase
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4.0 out of 5 stars One Wash Womder
Reviewed in the United States on August 22, 2020
After one wash the whole back of the cover is ripped! How is this product supposed to stand the test of time? Waiting to hear back if they will replace it.
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96 people found this helpful
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Reviewed in the United States on August 16, 2020
Color: Red CherryStyle: Radian 3R Fits 3 AcrossVerified Purchase
62 people found this helpful
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Reviewed in the United States on June 8, 2020
Color: Pink BlossomStyle: Radian 3R Fits 3 AcrossVerified Purchase
66 people found this helpful
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Top reviews from other countries

Liz
5.0 out of 5 stars Fairly easy install, instructions are hiding but there!
Reviewed in Canada on July 1, 2021
Color: Black JetStyle: Radian 3R Fits 3 AcrossVerified Purchase
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Liz
5.0 out of 5 stars Fairly easy install, instructions are hiding but there!
Reviewed in Canada on July 1, 2021
Installed this rear-facing into my F-150 last night.

The instruction manual IS there and it’s located inside the carseat at the back in the upper left side, there is a small symbol showing a book on the seat cover and if you unbutton the cover you can access it easily and pull it out (see my photos).

I used the UAS strap to secure it but it definitely was not tight enough, seems to be common in my truck. But once I also attached the tether by following the instructions and looping it around the seat in fronts track, it appears to be tight enough now. I am going to double check it and if needed add the seatbelt as well. This is only the third car seat I’ve ever installed before so I’m not a complete expert.

My daughter hasn’t used it yet but I will update my review once we use it for a while. I bought this particular car seat because it looks simple and it doesn’t block her view much and it feels very comfortable just from me pressing on it. And it is supposedly good for extended rear-facing. It is also a nice looking car seat from a reputable brand.
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8 people found this helpful
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Mike
2.0 out of 5 stars Good luck getting it to fit in anything but the largest SUV/Van
Reviewed in Canada on October 17, 2021
Color: Black JetStyle: Radian 3R Fits 3 AcrossVerified Purchase
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Mike
2.0 out of 5 stars Good luck getting it to fit in anything but the largest SUV/Van
Reviewed in Canada on October 17, 2021
It looks like a great seat, very solid and heavy duty. Unfortunately it doesn’t have any recline adjustment and the back is very long. Because of this, it will only fit rear facing in very large SUVs or minivans. I have a smaller SUV and I had to put the front seat so far forward that it cant be used. It is narrow though so you could get more than one side by side if legroom is plentiful. It should be fine in smaller cars in the front facing position, but you can forget about putting it rear facing. Another gripe I have is that they hide the instruction manual in a pouch under the cover. Of course I found it after I thought it was missing and printed out the PDF version online. The manual tells you where to find the hidden manual - yeah. That’s why there are a bunch of reviews here saying the manual was missing. It looks like a great quality seat, but I had to return it as our child has to sit rear facing. Be sure to do your research and measurements before buying.
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8 people found this helpful
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Willy
1.0 out of 5 stars Misleading information
Reviewed in Canada on February 7, 2021
Color: Red CherryStyle: Radian 3R Fits 3 AcrossVerified Purchase
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Willy
1.0 out of 5 stars Misleading information
Reviewed in Canada on February 7, 2021
Got the chair because it says it is steel core made; even the image where this is mentioned shows a grey (like steel) core but it is not true, all is plastic just like any other chairs. The chair design in fact is not bad at all, the material that covers the core of the chair is good, but this chair is being promoted with misleading information.
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8 people found this helpful
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Zach S
5.0 out of 5 stars Great item, fits perfectly for 3 across
Reviewed in Canada on January 7, 2022
Color: Black JetStyle: Radian 3R Fits 3 AcrossVerified Purchase
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Zach S
5.0 out of 5 stars Great item, fits perfectly for 3 across
Reviewed in Canada on January 7, 2022
Ordered this product as it is the ultimate 3-across car seat. We placed it forward facing in the middle seat of our Honda Fit, flanked by 2 infant Chiccos without difficulty. This made the side-to-side fit much better than with our previous car seat. Our daughter was happy that it is comfortable. It's her big girl seat. We're glad that it will last until our 4 year old daughter is done with boosters and then one of our newborns can use it until they are done with boosters as well!

Manufacture date was March 2021, product received Dec 2021 so it has most of the 10 years of life available for us to use. It's the Canadian version and so meets requirements for this country.

Only difficulty was my mistake, I tried to tighten down the top strap more than it needed to be and wasted a bunch of time, otherwise the install was straight forward.

Also don't forget that the manual is BEHIND the car seat in a little nook.

Overall we're glad to have it. No complaints so far. Would highly recommend.
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6 people found this helpful
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SA
1.0 out of 5 stars No instructions included
Reviewed in Canada on December 14, 2020
Color: Black JetStyle: Radian 3R Fits 3 AcrossVerified Purchase
6 people found this helpful
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