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Britax Pioneer G1.1 Harness-2-Booster Car Seat - Summit

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Include the Britax Pioneer G1.1 Harness-2-Booster Car Seat - Summit

Item # E1A417V


Seat weight: 21 lbs
Harness Mode: 2 years & 25 lbs to 70 lbs
Booster Mode: 40-110 lbs
Dimensions (in): 19 W x 28-36 H x 21 D

What's Included: Integrated cup holders


Side Impact Protection

Two layers of Side Impact Protection absorb energy and shield your child from the most severe type of collision.

Impact-Absorbing Base

The impact-absorbing base compresses to reduce the force of a collision

Easy Adjust

Quick-adjust 2-position buckle moves outward easily as your child gets bigger. No-rethread 9-position harness easily adjusts to grow with your child.

Patented V-Shaped Tether

Minimizes seat rotation with a unique two-strap design and staged-release stitches that slow and reduce forward movement during a crash.

The Pioneer Harness-2-Booster Seat is an excellent choice for making travel with your growing child safe, comfortable and hassle-free. Our comprehensive SafeCell Impact Protection surrounds your child in safety components that work together to protect well beyond the established federal safety standards. And Complete Side Impact Protection PLUS provides an advanced layer of protection with a protective shell and an energy-absorbing foam headrest designed to keep your child’s head and neck extra secure. Installation is made simple with Easy-On / Easy-Off LATCH Connectors that lock into place with an audible click and are easily released with the push of a button.

The proper fit is essential when it comes to safety, so the Pioneer includes our Quick-Adjust, 8-Position Harness and 2-Position Buckle to keep up with your growing child. Plush Foam Padding provides premium comfort at every touch point and the Integrated Cup Holders and Storage keep snacks, drinks and toys close at hand. There is even a simple Front-Adjust Recline so your toddler can sleep in comfort when the time is right.

The Pioneer Harness-2-Booster Seat can be used in Harness Mode for children 2 years old and 25 lbs up to 70 lbs or in Booster Mode for children 40 lbs up to 110 lbs. When your child is ready for Booster Mode, the harness can be safely tucked away the within the seat to easily transition the Pioneer into a high-back Booster without any hassles. The Pioneer Harness-2-Booster Seat is designed to provide everything you need to feel confident that your growing child is safe and comfy when you are on the move.

Top 5 Features:

  • SafeCell Impact Protection is an integrated system of safety components that work together to protect your child well beyond the federal safety standards. Including an Impact Absorbing Base and Tether, an Impact Stabilizing Steel Frame, and Complete Side Impact Protection PLUS, SafeCell means your child is surrounded in best-in-class safety.
  • SafeCell Complete Side Impact Protection PLUS provides an advanced level of protection: a deep protective shell absorbs crash forces and shields your child from debris, and an energy-absorbing headrest keeps your child’s head and neck secure.
  • Quick-Adjust, 8-Position Harness and 2-Position Buckle allows you to easily move the harness upward and buckle outward for a comfortable, secure fit as your child grows.
  • Front-Adjust Recline easily alters the seat angle for your child’s comfort.
  • Integrated Cup Holders and Storage keep drinks, snacks and toys close at hand.
Safe and Secure
  • SafeCell Impact Protection is an integrated system of safety components that work together to protect your child beyond the federal safety standards. Including an Impact Absorbing Base and Tether, an Impact Stabilizing Steel Frame, and Complete Side Impact Protection PLUS, SafeCell means your child is surrounded in best-in-class safety.
  • SafeCell Complete Side Impact Protection PLUS provides an advanced level of protection: a deep protective shell absorbs crash forces and shields your child from debris, and an energy-absorbing headrest keeps your child’s head and neck secure.
  • SafeCell Impact Absorbing Base compresses to absorb crash energy and counteract forward movement keeping your child clear from the seat in front of them.
  • SafeCell Impact Stabilizing Steel Frame gives you peace of mind knowing there is strength where you want it most, through the spine of the car seat reducing forward flex and at the connection points to the vehicle.
  • SafeCell Impact Absorbing Tether minimizes seat rotation with our unique two-strap design and slows forward movement with Britax’s patented rows of stitching that “give-way” one at a time.
  • Compatible with SecureGuardTM Clip to keep vehicle seat belt properly positioned on your child’s hips when in Booster mode minimizing the risk of abdominal injury (accessory sold separately).
  • Safety Proudly Made in the USA.
Fit and Comfort
  • Quick-Adjust, 8-Position Harness and 2-Position Buckle allows you to easily move the harness upward and buckle outward for a comfortable, secure fit as your child grows.
  • Front-Adjust Recline easily alters the seat angle for your child’s comfort
  • Plush Foam Padding in the cover, buckle pad, and shoulder pads surround your child in comfort at every touch point.
Smart and Simple
  • Integrated Cup Holders and Storage keeps drinks, snacks and toys close at hand.
  • EZ-Remove Cover for cleaning convenience.
  • Hassle Free Transition easily converts from Harness to Booster by safely tucking away buckles and straps within the seat.
  • Easy-On / Easy-Off LATCH Connectors locks into place with an audible click to both secure the seat in Harness Mode and prevent it from becoming a projectile when unoccupied in Booster Mode.
  • Color-Coded, Easy-Access Belt Paths simplify vehicle seat belt installation.
  • Tangle-Free, Five-Point Harness prevents the straps from twisting making it easier to load your child into the seat and ensuring a safer ride.
Aircraft Travel Certified when in Harness Mode.
268 Reviews
73% (195)
17% (45)
5% (13)
2% (5)
4% (10)
90% Recommend this product (241 of 268 responses)
By Stephanie
Long Island, NY
November 29, 2018
Love this Booster Car Seat!
This Britax booster seat made my 3 year old super happy. He was exited to have a big boy seat with cup holders just like his brother. The harness adjusts easily and it is locked into place with the tethers in my car.
By Terra
November 24, 2018
Love this seat
I wanted to get this seat for the longest time. I've got a tall heavy boy (47 pounds / 46 inches) he was in a Diono but he was so cramped up.
Pros I love the recline option, that keeps his head from slumping forward if he falls asleep. Cup holders are great. Sturdy feel all around.
ConsCon(for some prople): This is a big seat, you can't put another seat next to it (at least not in the Toyota Highlander.)
By M0mMy
Buena Park, CA
November 23, 2018
Safe and comfortable
Great value for safety and comfort. My son loves this carseat.
By 1badshreda
san diego
November 15, 2018
superior protection
Purchased two,one for moma,one for day care.Have had them for four days now, work great. Only the best for our little ones right?
* This product review was collected by the manufacturer.
By SJSokc
November 14, 2018
Horrible rattle
I've had this in my car for about 8 weeks and the rattle is enough to drive me crazy. Sadly we are returning the seat.
* This product review was collected by the manufacturer.
By Rose
November 11, 2018
Very comfortable
Car seat is very comfortable and easy to use.
By Nancy
Kirkland, WA
October 20, 2018
Unbeatable Safety and Value
We have four of the Pioneer seats. We love that they're Britax at an affordable price point. They're easy to install, use, and clean.
ProsAffordable Easy to install Easy to use Easy to clean Good reputation
ConsWish the armrest is moveable
By Erica
September 13, 2018
Perfect car seat
This fit perfectly in my car and my daughter was happy I got her a comfortable seat. Installation was a breeZe and I feel great knowing she is safe.
By Gabrielle Gutzwiller
Minneapolis, MN
September 13, 2018
Bought this for my 3 year old. I love how sturdy the seat is. I also really like the fabric. I think it's comfy for my son. He can see around the side bumpers which is nice too.
By Theggs
Toronto, Canada
September 10, 2018
Not as easy to install as the videos make it sound
I spent at least an hour installing this in my car and it's not the first Britax car seat I've had. I strongly suggest you test your instructions on a novice and use pictures of the actual car seats in your instruction book ... not just diagrams. Some of it is just incomplete and it takes forever to sort it out, e.g. the release lever for loosening the straps has to be used in conjunction with the small release button... this is NOT well explained, visuals are NOT adequate.
* This product review was collected by the manufacturer.
By Jennifer
Sand springs, ok
September 8, 2018
Best car seat!
I had been looking at this car seat and several other seats similar to it. I have always heard good things about this brand but have never owned one. I finally bit the bullet during the sale and bought it for my 2 yr old. I absolutely LOVE it! It is a tad bit heavy but I can deal with that to have a good quality and safe car seat. My son is a little bigger than your average 2 yr old and this seat has so much room. The first time he rode in he could t stop telling me how comfy it was. I won’t have to buy another seat this one will grow with him. Super easy to install also.
By Leigh
Canton ga
September 4, 2018
It’s better than graco but not as great as clicktight
This seat fits our needs but I do not like to move it from car to car. It’s not heavy but getting the chair tight in the seat takes some work. I should have spent a little more and got the click tight version. It’s way easier. I still gave this seat 4 stars because it is a good seat and my daughter loves the cup holders and arm rests.
ProsCup holder and arm rests Not as heavy as convertible seats
ConsIt?s not clicktight but that?s not the chairs fault it?s mine for not buying the correct version
Best UsesWhen it stays in the same seat and ou don?t have to move it from car to car daily
By Cinsy
August 31, 2018
Great large carseat
Great large car seat. Fits perfectly in our van. Easy install.
By Jill
Carthage, MO
August 31, 2018
Britax Pioneer
This carseat has been perfect for our needs! Prices were awesome! Checkout and shipping were fast and easy!
By Holly
Wilmington, NC
August 29, 2018
Exceptional safety for its price!
We are very happy with this seat and the safety and security it provides at a reasonable price point. The cup holders on each side are an added bonus! Highly recommend.
By Sarah
Boone, NC
August 25, 2018
Excellent Quality
This is the second Pioneer I've purchased. I found out that my granddaughter had outgrown her Boulevard and was sitting in a hand-me-down all plastic seat in mom's car. I just feel like Britax seats are much safer. And they're an exceptional value for the quality of the product.
By Hanna
August 24, 2018
Great value and Love Britax
Perfect experience... Great Britax product at great prices. Easy to install and love the double cup holders and well constructed. Note the latch strap does not come with it if you plan to use one. Albee always ships quickly I recommend them to all of my parent friends .
By Lois
Atlanta, Georgia
August 22, 2018
Grandma is happy!
I bought this seat to have in my car for my grandson. I'm familiar with Britax car seats in general, as I had purchased 2 previously for my son and daughter in law that have been in use for a while now, and are great. I actually installed this myself, and unlike other users, found absolutely no issues with the process. Other than the weight of getting it into the house after delivery, and then into the car, it was very easy. And thank goodness for the weight as it is definitely a very sturdy and protective seat. I would highly recommend this to other grandparents and parents
By Mary
Fort Collins, Colorado
August 18, 2018
Britax Pioneer
This is a perfect car seat for our three year old. The safety features are very secure and the seat is comfortable for our granddaughter. It is also very easy to install.
By Gary
Warsaw, NY
August 17, 2018
Another top quality seat from Britax
Britax quality was quite evident in this seat. The metal frame makes it heavier than some, but the added security is worth it. Overall construction is top notch. The push button latches make hooking to the seat anchors easy. With two grandchildren to transport, this makes Britax seat nbr. 2, and the quality of the first seat is what sold us on buying this seat.
ProsHigh quality construction for maximum security and usable for 9 years.
ConsDirections a little difficult to understand, but a phone call to customer service solved the problem.
By Holly
August 17, 2018
Great seat!
This is a great booster seat with harness for my 4 year old. Seat back height adjust easily! Feels sturdy and safe:) Thinking of buying another one with out the harness for my 6 year old.
ProsHeight adjust easily Son can buckle himself
ConsSon cannot release the buckle on his own.
By Michelle
August 15, 2018
Love Britax
As always Britax surpasses the competition in construction!! Bought this one cause I couldn’t afford two click tights so not as easy to put in but it’ll do:).
By Carole Idom
August 15, 2018
Great seat
Just what I needed for my grandchildren!!!!
By Shannon
Charlotte, NC
August 2, 2018
Love it!
We are on Britax car seat #3 (B-safe, marathon, now this). We buy 2 each time so that I have one and my husband has one. Have never had issues. My 4 year old loves his new booster seat. I wanted a booster with the harness for added safety. He’s not yet 40 pounds so we’ll continue using the harness until he’s too big - he’s always had a harness so doesn’t know any different. :) He says it’s very comfortable. It’s super easy to install. We always use the tether. It doesn’t budge. Ordering was easy and shipping was very fast! Highly recommend this site and this booster.
By Tara R
July 25, 2018
Love Britax
It’s a very well made, sturdy seat. The only thing I would warn some people of is that the back is really high. I drive an SUV so it’s fine, but in a small car it may be a little high in the back.
By Alexis
Odessa, Florida
July 21, 2018
Very happy!
My son is 5 and wanted a “big boy” booster seat but I wasn’t ready to not have him in a harness, this seat works out great!!
By Erin
July 14, 2018
Great Product. Great Experience.
Product came as advertised and on time. Love this booster.
ProsVery safe booster. Easy to use. Easy to install. Love the recline feature. Lots of cushion on the seat and back.
ConsHeavy. Which is understandable considering all the safety features. This is not a complaint, just something to be prepared for. Also be aware it is wider than non-five-point-harness boosters. Again, not a complaint.
By Diane
July 13, 2018
Great harness car seat for tall child
My daughter is almost seven, we did not move her to front facing until her fifth birthday. I want to keep her in a 5 point harness for as long as possible. She is 50 inches tall which is the general height limit for a lot of 5 point harness car seats. This seat allows her another 7 inches before she switches to seat belt. I really like it so far, it was easy to install and she says it is comfortable. I love the two cup holders and she seems to have more leg room than her last car seat which was more reclined putting her knees at an angle. The only con I have had is it does tend to make a chirpy squeaking noise when it is empty I assume it is from the foam rubbing the plastic without weight holding it down. Already planning to buy my Mom one so we don't have to shuffle this one. Well worth the money.
ProsTaller 5 point harness use Two cup holders Easy to install Comfortable
ConsSqueaky chirp noise when empty
Best UsesTaller child who still needs 5 point harness
By Sandy
Bolivar, Missouri
July 11, 2018
Great Seat
I bought this seat for my then 3yr old to move him forward facing because he was passing down his convertible to baby brother. He instantly loved the seat. It has an easy install, and very easy to use otherwise as well. We have now had the seat for a year, and it is still in the shape it was in when I bought it new. I would definitely recommend this seat to anyone that has a kiddo that is at least 2yrs old and forward facing.
By Bridget
Ashton, Illinois
July 9, 2018
Excellent harness to booster!
I bought this seat based on reviews and price point. It was to replace the convertible seat that our daughter was outgrowing. I researched just as I did when buying her earlier safety seats. It arrived quickly and was ready to go right out of the box. I read through the installation instructions and got it set up in my van. It went in pretty easily and tightened up really well. I dis have to adjust my brain for the V style tether but otherwise installation was quick and easy. My daughter was excited to try her new seat and said it is comfortable. She is able to do her own buckles after a little lesson and seems to enjoy the ride. The safety of this seat seems legit as it is heavy and has steel reinforcement. The amount of padding is less than our previous seat but I haven't heard any complaints. We are using it in harness mode.
ProsEasy installation, Feels safe, great safety ratings, stylish, comfortable, nicely sized for van or car use.
Best UsesUsing this for 4 year old. Hope this will be her last seat needed.
By Christine
July 2, 2018
Great seat! Fast shipping.
By Sara 👸🏼 De Loera
Reedley, CA
June 30, 2018
Simply Love it
Great car seat easy to install. Very safe. And nice looking. I can assure you my son is comfortable in it. :)Great purchase!!!!
By Daci
June 30, 2018
Britax Pioneer Harness Booster Car Seat
Easy checkout--Fast shipping--great product. No problems.
By Katie
June 28, 2018
Tricky belt path
I find the belt path a bit troublesome. For the one I used the LATCH with I had to completely remove the strap attachment to get the LATCH cover part of the seat to sit flat again. I also think the belt path is an issue because it doesn't really sit back in the seat so that the carseat cover doesn't stick out. I (an old CPST) was able to make it work, but I'm afraid a person who knows less about carseats may struggle with this. The belt path needs to recess back into the seat a bit so that cover easily covers it. Overall it is a BRITAX and that is what I'll pay for. I have had many of their seats and I'm always happy with their products. This seat was to replace a Diono Radian rxt.
By Tyler Brynn
Dallas Tx
June 27, 2018
LOVE this seat
We have three of them now. Two cup holders, easy to install and to set the child into. Evidently comfortable and our 5 year old can unbuckle himself. I regret ever having bought any other kind of seat. Love this style.
ProsTwo cup holders and easy go to install and adjust.
Best UsesOur almost 2 year old is too big for the convertible styles - and they slant backward when facing forward. With this Britax, he sits upright when facing forward and enjoys being able to see out the window and communicate with us. This is a great seat
By Kristen
June 20, 2018
Safe, easy to install, comfortable
This car seat already has a great review for me after reviewing its safety ratings. But after receiving it, the installation was simple, it was medium weight not super light but also not so heavy that myself (as a smaller female) couldn't lift it above my body to place in the car. My son really loves it, it's comfortable and when he fell asleep it kept his head upright!!
By Mia
Florence, SC
June 20, 2018
Best Car Seat
This car seat is the best. My daughter is a tall 4 year old and she fits it perfectly. We went through 3 difference seats before we was happy. Worth the money for your loved one!
ProsFits tight in vehicles, works for the bigger taller kids, the piece between her legs is not right up on private.
Best UsesAll stages!
By Erin
Tampa, FL
May 23, 2018
Easy to use and easy to clean
This is a great booster seat for our next step past the regular car seat. I wanted to be sure it had good safety ratings and strong harness system. My kiddo is heavy but thin and muscular so we needed something that would tighten well and keep me confident in his safety. This car seat tightens well without being uncomfortable for him. If he spills it is pretty resistant from stains. We clean up fast with detergent and water or a baby wipe and it's been a-ok. It was easy to install. And is very simple to adjust height. I am very happy with this choice in seat. It feels very comparable to our Click-Tight Frontier at a much better price. I am very happy with this choice.
ProsEasy to install Cleans well Nice color choices Simple size adjustments
ConsCup holders could be slightly larger
By Dianna
Rockville, MD
April 25, 2018
Great car seat!
My kids and I just love the car seat! I actually bought two of them, for two cars. easy to install and very comfortable, has a cup holder where my son can put his staff and cup. Very stable and nice!
By rvangossen
Alexandria, Louisiana
April 21, 2018
Great price!!!!
So pleased with price and shipping time!
By Tiffany
Groveland, Florida
April 19, 2018
Great product and super fast shipping
The car seat was exactly what I was looking for. It is very heavy, but I love that it is heavy because I feel like it means its safer. Its made very well and steady. The thing it doesnt have that I wish it did is the clips that attaches it to the seat, you have to attach it with the seatbelt. The shipping time was so fast, I received it with in a couple of days.
By Casey
April 18, 2018
Son loves it!
Easy to install, so easy to tighten down. My son loves it, especially the 2 cup holders. Hes able to buckle himself in with ease. Would definitely buy another.
By Erin
Winona, mn
April 12, 2018
Great transitional seat
Extremely easy to install. Easy to adjust and son says it is comfortable.
By zabdi
Provo, Utah
April 6, 2018
Its a good car seat but can be better!
I got 3 of these boosters seats. I like that is a five point harness booster seat which gives me peca of mind that my kids will be safe in it. My kids like it and love the arm rest and they said is comfortable. The only think that I don't like is how hard is to adjust the straps. They supposilly move with the head rest but its so hard! I read that with the Frontier (a better version of this) is easier to adjust the straps so my advice is that if you have the money get the frontier instead of this as it feels more sturdy.
By Judy
March 31, 2018
Solid and tight fitting seat
We bought this seat for our grandchildren. It was fairly easy to install and it's easy to secure the harness. Great seat so far. Expect it to last many years since it can be used as a booster seat too.
By Melanie
Colgate, WI
March 29, 2018
Love love love
I love, and only use Britax seats. I knew the booster wouldn't disappoint, and it didnt. My son loves it! Very happy with my purchase.
By Brimob
Gales Ferry, CT
March 29, 2018
Would not recommend
I bought this car seat for my three year old four months ago. I researched and decided to go with this one over the diono I normally buy. Huge mistake! I despise this car seat. There have been many days that I wanted to sit this car seat out by the trash. It feels cheap, it does not tighten easily, and it a very awkward seat in the back of my van. My three year old often complains of how uncomfortable it is too. I would definitely not recommend this seat
* This product review was collected by the manufacturer.
By katie13n
March 26, 2018
Very hard to tighten!
I am upset with the performance of this car seat. We had a Britax convertible car seat first and LOVED it (still do for my younger child) but this car seat is so hard to tighten that I get upset/frustrated every single time I have to put my daughter in it. I plan to buy another seat instead.
* This product review was collected by the manufacturer.
By Ashton
Liberty mo
March 19, 2018
Great seat
Fit well. My son likes it. Easy install.
By Leah
Titusville PA
March 11, 2018
Highly recommend!!
My son easily gets carsick, and most seats make him hot which doesn't help. This seat, help keep him cooler, he says its very comfy and roomy. He freaks out with alot of seats, but he instantly loved this seat!
ConsHeavy and bulky

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