(as of May 19, 2025 03:10:47 UTC – Details)
The original 3 across All-in-One Car Seat just got better. Upgraded with 15 improvements from the award-winning Radian 3RXT, the Diono Radian 3RXT SafePlus features Diono SafePlus engineering, SafePlus anti-rebound panel and advanced SafePlus Side Impact Protection for complete protection from birth to booster 4 – 120 lb. From babys first journey the Radian 3RXT SafePlus provides complete rear-facing protection with a SafePlus newborn travel high wedge and SafePlus 2-in-1 infant positioning liner for a custom fit from 4 lb. As your child grows the SafePlus steel anti-rebound bar increases stability and reduces rebound rotation by up to 50%, so you can keep them in a safe rear-facing convertible car seat for longer (up to 50 lb). As both a rear and forward-facing convertible car seat, the Radian 3RXT SafePlus protects as they grow, with SafePlus easy adjust 12 position headrest that offers a 22% increase in occupancy range from the Radian 3RXT. As they grow the Radian 3RXT SafePlus provides 6 layers of SafePlus Side Impact Protection without compromising the famous Radian 3-across slim fit in most midsize vehicles. All these great features have been combined with SafePlus engineering, with the Radian 3RXT SafePlus All-in-One Convertible Car Seat subjected to a combination of the most rigorous crash tests to ensure the safest seat possible. Parents can also expect the travel friendly traits Diono is famous for, including convenient fold and FAA approval for use on an aircraft. So, no matter where you go you can take Diono safety with you.
10 Years One Car Seat – from Birth to Booster (4 – 120 lb) it’s all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat!
SafePlus Rear-Facing Engineering up to 50 lb. With 3 modes of newborn protection, our steel anti-rebound bar reduces rebound rotation by up to 50%.
Fits 3-Across – our famous slim-fit design with SafePlus 6-layer side impact protection with zero compromises to safety, space, or comfort.
Mechanically engineered from reinforced automotive grade high-strength steel, our unique core shell shields and protects your child.
One hand easy-adjust 12-position headrest, the SafePlus completes 6 layers of enhanced, rigorously tested, side impact protection.
Customers say
Customers find the car seat to be well-built, with good quality materials that will last through the booster stage, and appreciate its slim design that fits 3 across. The car seat is comfortable and safe, with one customer noting the padding around the straps for comfort, and they like its appearance, with one mentioning the nice fabrics. While some customers find it easy to install, others report unclear instructions, and opinions about weight are mixed, with some finding it a space saver while others describe it as extremely heavy.
AI-generated from the text of customer reviews
Jarred Jenkins –
Great Seat
Nice, heavy, sturdy, comfy! My son is disabled & cannot sit in the vehicle seat without extra support. He was getting too big for a âregularâ car seat. This seat is bigger & has a larger weight/height capacity. It is that perfect size for him & he looks comfy sitting in it!Comes with extra parts. Pay attention to what they are. Some are only needed for smaller children & reveres facing options. Scan the bar code on the paper in the box to understand assembly!
Elizabeth Guillen –
Space saver! Toddler approved!
Love the car seat! My husband and I have used the evenflo 360 revolve gold since my daughter turned 1. Sheâs 3 going on 4 and we have a baby boy now who will inherit her revolve 360 seat. We decided to look for a car seat that was easy for my toddler to get in on her own without having to carry her into the seat and a car seat that was a space saver. This one did the trick itâs so much leaner and easy to adjust the buckles. My daughter does it on her own compared to her old one. What I will say is I donât move the car seat at all so weight wise I wouldnât be able to comment but when installing it wasnât super heavy but it felt super sturdy. My only complaint is the cup holder wish it was built in but I understand itâs detachable to save space but works well! My husband didnât have any issues with installation of the car seat he said it was straight forward for forward facing. One last thing my daughterâs head doesnât hang when asleep itâs very rare compared to her revolve 360 that would occur always.
Mallery –
Absolute Lifesaver
The Diono Radian 3RXT 4-in-1 car seat is an absolute game-changer for parents. This car seat is a true gem, and it’s no exaggeration to give it a 5-star rating.First and foremost, the safety features are top-notch, providing peace of mind that every parent craves. The 4-in-1 design means it grows with your child, saving you money and hassle in the long run. It’s incredibly versatile, accommodating various stages of your child’s growth.Installation is straightforward, and the slim design is perfect for fitting multiple car seats in the back. The fabric is easy to clean, which is a huge plus when dealing with little mess-makers.In short, the Diono Radian 3RXT 4-in-1 car seat is worth every penny. It’s a reliable, durable, and versatile investment in your child’s safety and comfort, making it a clear 5-star choice for any parent.
Amazon Customer –
Itâs big!!
I like this seat, but itâs HUGE and heavy!! Made great but can be bulky. Just keep that in mind. But these worked without seat is comfy and my child loves it. Seems very safe!!
Brian Law –
Extremely heavy, overly complicated and straps won’t tighten properly on smaller children.
Purchased this because of the narrow width to use as a travel car-seat on a commercial airline and with a rental car. I would strongly recommend against buying this if you intend to travel with it. It is extremely heavy and nearly impossible to maneuver on board an airplane. It is supposed to be good for children from birth to age 10, but because the straps have to be made to fit bigger kids, they won’t tighten properly on a small toddler. I took the cover off to wash it prior to use, and needed the have the instructional video playing over and over to understand all the steps to disassemble and reassemble the seat. Replaced it with a much simpler and lighter carseat for travel.
kalob gregory –
Best car seat I have!
This is an amazing car seat. I was in an accident with a previous car seat that saved my two year old. It was a cheap one I got on sale so for the new one I wanted something with great reviews and that was known for its safety. I feel so much safer with her in this car seat. Installing is typical to others. Not too hard but you definitely want to read your manual and maybe watch an installation video. It fits great in the middle seat with plenty of room for two other passengers on each side. The seat is more narrow than others with adjustable sides. My daughter seems to be comfortable and I’m at ease knowing she’s safe.The only thing I’d say about this car seat is it is HEAVY!! we traveled to the airport with it and carrying it around by itself was horrible. I recommend buying the separate carrying case if you do any sort of traveling.
TL –
Safety is everything
My baby is so secure and safe in the car seat. I love the quality and I feel good about the car seat. Sheâs in. I love the color as well.
Nicholas –
Solid Narrow Seat
Solid seat, not as heavy as other reviews made it out to be. This is not a pumpkin seat so expect it to be heavier than those. Directions for installation are not detailed enough for rear facing in my opinion, but that’s what YouTube is for lol. Very happy with purchase so far
Anny –
Es famoso por ser estrecho, pero al ponerlo viendo hacia atrás necesita mucho espacio de las piernas del copiloto para que quepa
WestCoast Mum –
I don’t understand the bad reviews. I purchased for the 3-across feature as I needed a narrower seat for the smaller rear seat area of my 2-door car.Note: seat is tall. I was not able to install seat rear-facing as it didn’t fit properly because of front seat positions. Would have had to move front seat too far forward so there wouldn’t be contact between front seat and car seat. So. Had to make choice to have my 13-month old face forward much earlier than recommended or return seat and start over.My local police detachment offer free car seat installation clinics (RCMP, Canada, BC) so I signed up for one and discussed my dilemma. I was told it was okay by them to have the seat forward facing as long as it was installed correctly and LO fit into the seat properly. Obviously not ideal, but not against the law here. I have seat in rear centre.The anti-rebound bar is for rear-facing only and only comes with the seat when you purchase the +plus package. This is to prevent rear-facing seats from flipping up towards a rear-end impact. I bought the +plus seat but obviously can’t use it with forward facing installation.The seat is very good quality and LO seems comfortable. I didn’t purchase a cup holder as I don’t give food or drink during driving for safety reasons (cannot attend to baby if choking).The straps in the compartment at back of seat are glitchy.I do have seat anchored with the strap to the vehicle seat anchor at the top and centre of the rear seat and it was tricky to get it tight enough.Again, the free car seat clinic helped.Last, make sure your car’s seatbelts have a snap-locking system. I have an old car that doesn’t, so had to buy the car seat locking clips (cheap) to lock the seatbelt in order to secure the car seat.I think this is a good quality car seat and recommend.
April Joy R. Vargas –
It’s the best car seat ever! It’s heavy duty but i can tell it’s a good quality and safe for my son
Kiana –
Super dissapointed that the insert is black on the picture and I got grey. Very heavy, lots of pieces. It’s a super safe seat and is heavy but fabric feels really cheap. I wanted it for the 3 across though. I’ve ordered 2. I like it otherwise. Cupholder is cheap and moves around too much for my liking. I’d keep my other seat but it was too bulky. I like the slimness of this one.// I’m updating my review to say I HATE the buckles on this seat, they look and feel like the cheapest things ever made and I HATE that my kiddo can move the chest clip up and down so easily. This no longer feels like a safe seat. This seat REALLY needs a harness upgrade. I feel like they focused so much on anything else that THE MAIN THING TO KEEP KIDS SAFE got skipped. I really am thinking of returning these seats now. // I’ve been only using the blue seat I got of the 2 for 2 months (it’s been in the box until my son turned 1) and it has so much discoloration, rips and tears already!! And it’s so straight up and down after about 10 mins my daughter gets frustrated that hers is uncomfortable. If you’re thinking about buying these seats for an easy clean, comfort and long lasting THESE ARE NOT IT!!! We have 2 different brands in dad’s car. I may be tossing these useless junk and getting a different brand.
K –
Heavier than expected. Sturdy and made with quality materials, the seat it self is nicely padded and feels very comfortable. Nicely designed and the beautiful colour was a bonus. The seat I received has a manufacturing date of August 2021. I bought and received the seat in November 2022.Update:Car seat is quite large and it will not be angled correctly for a rear facing infant in certain vehicles. Also it may not fit in smaller compact vehicles when using rear facing. I recommend researching your vehicle and if it is compatible. But all in all it is a quality car seat and I find is easy to install/uninstall.