Britax Frontier 90 Booster Car Seat - Onyx

This item is discontinued.
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ClickTight Installation System allows parents to easily achieve a safe and secure installation using the vehicle seat belt throughout the life of the seat, in harness mode, without having to worry about the weight of their child (May not be compatible with all vehicles. See installation instructions.)

True Side Impact Protection provides deep side walls and a head restraint with energy-absorbing EPP foam to distribute crash forces, shield from vehicle intrusion, and contain the head, neck and body while keeping them ?in true? or aligned

Base with SafeCell Technology designed to keep your child safe and secure in a crash by compressing and significantly lowering the center of gravity, reducing the forward movement of the car seat

Superior 360 Degree Protection Features

  • Integrated Steel Bars strengthen the connection to the vehicle and reduce forward flexing of the child seat during a crash
  • Energy Absorbing Versa-Tether® anchors the top of the car seat to the vehicle using a two-point attachment, minimizing the amount of forward movement of the car seat. Stage-released stitching helps reduce the crash forces reaching the child
  • HUGS? (Harness Ultra Guard System) Chest Pads provide resistance to forward movement in the event of a crash
  • Tangle-Free, Five-Point Harness (with 9 harness height positions - up to 20.5?) distributes crash forces across the strongest parts of the body and provides a secure fit
  • Compatible with SecureGuard? which works with the vehicle safety belt in booster mode to prevent the child from sliding under the lap-belt portion of the safety belt during impact, thus minimizing the risk of abdominal injury (accessory sold separately)
Superior Fit and Comfort Features
  • 90-pound Weight Capacity in Harness Mode allows your child to remain harnessed up to 90 lbs
  • 120-pound Weight Capacity in Booster Mode for safety and comfort as your child grows
  • Front-Adjust Recline for optimal child comfort
  • Comfort Foam provides an extra layer of padding to cushion your child
  • Two Buckle Positions offer a snug and secure fit for your growing child
  • Armrests provide a natural and comfortable place to rest arms
Superior Ease-of-Use Features
  • Quick-Adjust No-Rethread Harness easily adjusts the harness shoulder height and head restraint from the front of the seat without disassembling the harness straps
  • EZ-Buckle? System retains the harness buckle in a forward position and prevents the child from sitting on the buckle when boarding
  • Integrated Cup Holders and Storage are designed for easy access to children’s cups ,snacks and toys
  • Easy-Remove Cover allows easy cleaning,without disassembling the harness or uninstalling the car seat
  • Color-Coded Vehicle Belt Guides provide clear indication of the path and positioning of the vehicle seat belt for use in either harness or booster mode
  • Premium Lower LATCH Connectors included

Child Weight (lbs) Forward Facing Harness: 2 years & 25, up to 90 Booster: 40 - 120
Child Standing Height (in) Forward Facing Harness: 30 - 58 Booster: 45 - 62
Child Seated Shoulder Height (in) Forward Facing Harness: 12.5 - 20.5 Booster: 15 - 23
Product Weight (lbs) 25
Product Dimensions Harness Minimum (in) 19W x 28H x 21D
Product Dimensions Harness Maximum (in) 19W x 36H x 21D
Product Dimensions Booster Minimum (in) 19W x 28H x 21D
Product Dimensions Booster Maximum (in) 19W x 36H x 21D
Seating Compartment Height (in) 23.5
Seat Area Depth / Width (in) 13.5 / 12
Shoulder Width (in) 15.5
Harness Slot Heights (in) 12.5 / 13.5 / 14.5 / 15.5 / 16.5 / 17.5 / 18.5 / 19.5 / 20.5
Buckle Strap Depths (in) 7.0 / 9.0
Product Reviews
out of 5.0
21 Reviews
Ratings Snapshot
of Reviewers
LOVE this seat and Albee Baby!
January 8, 2014
I love this Britax seat for several reasons! I had the Frontier 80 when it came out years ago for my daughter and this seat has just improved with the 85 and 90! This seat is the one I order most to use with children with special needs. It is the best seat for a parent who wants to keep their child safe in harnesses as long as possible. My most recent order of this seat was for a 7 year old boy with severe autism. He has so much rooom to grow in this seat and by keeping him harnessed, he is safe and his family is safe in the car as well. Albee Baby is the best to work with and always has the best deals! As a Carseat Tech, I can order directly through Britax (with a discount), but the cost is ALWAYS more than going through Albee Baby! Thank you for providing a great site!
United States
Easy to install and feedback from user has been great
November 22, 2014
It was a relief to be able to install this so easily - just make sure to watch the video a few times.
Charlotte, NC
Verified Buyer
November 19, 2014
I bought our first Frontier about 2 years ago and really like that it has such a high weight and height rating in a 5 pt harness. So, when my second child outgrew his Britax Boulevard we purchased another Frontier for him. And WOW at the improvements they have made. The Click Tight is the REAL DEAL! I watched the videos and read the reviews but was extremely skeptical that by simply pushing the seat bucket down with one hand would get it installed as tight as me climbing in the seat backwards, using all my weight and cinching, pulling and tugging on the seat belt to get it installed (like with our first frontier). But it totally does! It installs in seconds with almost no effort as snuggly as what takes 20 minutes and breaking a sweat with my other seats. Beyond that the seat is very well constructed, sturdy, comfy. Can easily recline just before installing without having to flip it over to do so. We have both of ours installed in the 3rd row, both outbound positions of a 2014 Honda Odyssey and it installs perfectly. Love this seat!
  • Easy to install. Safe 5 pt harness up to high weight/height/age. Comfortable. Well built (in the USA).
Best Uses
  • We use the seat for our children ages 4-7.
  • None
Verified Buyer
Great carseat - easy install
November 13, 2014
Great carseat, the click tight function is key. Will never buy another car seat without it.Have the red/black version as well for my 4.5 year old.
Very easy to install!
November 6, 2014
The Click Tight on this seat makes installing it very easy. The 20.5" top harness height and 90 lb harness limit makes this the longest lasting seat on the market. No rethread harness adjustment makes it easy to use for multiple kids.
  • Easy install
  • High height limit
  • High weight limit
  • Tall top harness height
  • Very heavy seat.
Gilbert, AZ
Great booster car seat
September 15, 2014
We purchased this for our son to move into while our daughter uses the Britax convertible car seat. We bought two of them and have been extremely happy with the product. They are super easy to install and seem comfortable for the child. This will last a long time!
York, Maine
Great Seat
August 22, 2014
As a Pediatrician, I love Britax for their durability and safety. I was not ready to move my 5 yo to a booster with lap belt, even though that is all that is legally required in our state. He loves his new booster seat, as he now feels like a big boy and is thrilled with the cup holders. I love the 5 point harness, new latch system (my easier to install) and the side impact head restraints. This is much more expensive than the flimsy $40-60 boosters out there, but I have great peace of mind with this seat.
Verified Buyer
July 18, 2014
I love this seat. It is our 3rd Britax. This seat is super easy to install and it does no move. It's super secure and I feel good about my 3 year old riding in it.
R S.
Seminole Florida
Verified Buyer
Excellent experience
July 18, 2014
Item was as described and arrived in good condition! Always a pleasure doing business with Albee Baby!
Gardena, CA
Verified Buyer
Love Britax!
July 17, 2014
We love this booster! My daughter is 3 and had outgrown her car seat. I love that the booster has a harness but can be switched to a seatbelt as my child grows. I was a little worried that the black might get too hot in the summer but it doesn't. My daughter loves to climb up into her new seat and she seems comfortable. I'm happy with this seat.
  • The bottom seat pad is removable for machine washing but the rest of the pad just gets wiped down.
Boston, MA
Verified Buyer
So Easy to Install
March 13, 2014
We had purchased this seat for my 4 yr old daughter. Needed one for the other car but didn't want to spend as much sopurchased the Britax Pioneer 70 thinking it would be "good enough" for the car she doesn't ride in as often. We were wrong. Returned the Pioneer for the Frontier. Seat was almost identical with the exception of the Click Tight installation feature. Now that she is riding in friends cars for play dates etc. and other family members cars more often, I can switch her seat to another car in seconds. There is never any question as to whether the belt could be any tighter. Seat doesn's move a bit once installed. Worth the price!
Johnny W.
New York, NY
Great Seat
January 29, 2014
I've only had this car seat for about a month but it has worked perfectly. We previously had the Britax Marathon Car Seat which my son loved. Naturally when it came time to step up to a booster seat, we only looked at one brand. The seat is easy to install (after reading the manual) and provides a snug yet comfortable fit. It is easy to adjust and fits securely in our car (Volvo XC90). The color is fantastic, the cup holders and arm rests are a nice touch as our son loves it.The lone downside is that it is a fairly large seat and is bulky. You might have to move your front passenger seat forward if you have a smaller car. It is also quite heavy so its not ideal to use if you have to swap it in and out of multiple cars.You can't go wrong with Britax' quality and safety features. Highly recommend the seat if you're looking for a booster when your child outgrows the car seat.
  • Safety, ease of use, secure five-point harness, easy to install
Best Uses
  • Booster seat, transition from car seat to child booster.
  • Bulky, heavy, takes up a lot of room
Very Nice product !!
January 2, 2014
I had the a previous seat the Pioneer 85 no longer made, was in an accident no one hurt but time to buy another seat. This seat is even better than the last nice upgrades head side protection is very nice and the Click install makes putting this thing in the car a breeze and no more shifting of the seat. High recommend this seat.
Osceola Mills, PA
Verified Buyer
September 27, 2013
Love this booster car seat, my son was so excited and says he loves it. Not wild about the fabric design.
  • Made to hold bigger kids in the harness position. Love the quick click securing feature.
Gloria C.
Redlands, Ca
Verified Buyer
Britax Frontier 90 Booster Car Seat
September 16, 2013
This Carseat is a very good quality the price was good and we are very happy with it. This is the second car seat we have purchased from you,
Mapleton, IA
Verified Buyer
Easy to install
September 3, 2013
I have had many Britax seats in the past but the ease of install of this seat using a vehicle's selt belt is unbelievable. The seat is secure and easy to install and take out! Such a nice feeling having such a secure seat in the car for my kids!
  • Ease of install and use
  • none
Kingsport, TN
Verified Buyer
Great Product. Great Price.
August 27, 2013
This is the third Britax car seat we've purchased and they live up to their reputation. Very well built product. If we have to buy another car seat, it will be a Britax.
St. Augustine, Florida
Verified Buyer
Great seat for safety conscious parents!
August 7, 2013
My 6 year old daughter loves this seat! I will keep her in a 5 pt harness as long as possible. Thank you Britax!
Hockey d.
Seattle, Washington
Verified Buyer
Expensive, but worth the cost in the long run.
July 21, 2013
Sure, this booster seat is on the upper end of the price spectrum, but I think it's worth the cost for some people.Before this booster, our daughter used the Britax Marathon convertible seat; it's a good seat, but our daughter would get restless after 3 hours in the seat (on a road trip). She was able to sit in the Frontier for 6 hours withoutcomplaint on a recent road trip.Besides the cushioning, we love the Click Tight system. We can move the car seat easily between cars. We're also able to drive our nephew around because it's easy to adjust the height without removing the seat. The front adjusting recline is a bonus too.If I had one complaint, the shoulder straps "appear" to get tangled easily; however, they're not really tangled. Theystraighten themselves out when you pull it tighter.
Lehigh Valley, PA
Verified Buyer
Finally a Britax seat that is eat to install!
July 18, 2013
Purchased this for my 40# 6yo daughter. Click tight makes it really easy toInstall! The height/weight range of the seat is awesome. I don't think she'll ever outgrow it. (As a matter of fact, I am short and small and I fit within the weight/height to use the seat as a booster.) She likes that it sits lower than her combination seat which just expired. The cup holders are a nice touch. Like all Britax seats the construction is solid. I also got a less expensive high back for my husbands car but ended up returning it because compared to this, it didn't feel safe. She feels a little more like a big girl in this seat. (Even though she was slightly bummed that all of her friends at school are in backless boosters or nothing at all!!! But she understands a high back is safer.)
  • High weight and height limit.
  • Allows for extended use in booster mode.
  • Click tight installation FINALLY makes a Britax seat easy to install.
Best Uses
  • Forward facing safety seat with a high weight limit.
  • A car with a little room. It's a big seat.
  • Heavy, not great for travel because of the weight and size.
  • I find it slightly difficult to adjust the length of the straps in 5-point-harness mode.
United States
Verified Buyer
Easy to install and fixes the issues with the 85.
July 5, 2013
The new install technique is a BREEZE. And this seat fixes some of my beef with the Frontier 85. The middle buckle sits better, the cover doesn't come off. I wish I could have two of these and not the Frontier 85.
  • Install
Customer Q&A