Maxi Cosi FamilyFix S ISOFIX R129 Car Seat Base
853/2738£110.00
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About this product
Maxi-Cosi FamilyFix S is the S-Family's dedicated ISOFIX car seat base. Compatible with both Pebble S and Pearl S, it ensures a safe and secure setup in your car for every journey. That means your little one can travel in safety and comfortable in the recommended rearward-facing position up to 4 years old, or until they're old enough to face forwards. It meets the latest i-Size safety standards and minimises installation errors with its intuitive Click & Go feature. Complete with installation feedback, so you know you're good to go.
Your little one travels safely and comfortably in the recommended rearward-facing position from birth up to 4 years old and forward-facing if preferred as of 15 months.
The intuitive Click & Go mechanism ensures a quick, safe, and secure car seat attachment to the FamilyFix S ISOFIX base, with a simple "click, you're ready to go.
Winner of no.
- Compatible with Pebble S or Pearl S.
- Only use in front seat if there is no active air bag.
- ISOFIX compatible .
- Forward and rear facing.
- Size H37, W34.5, D66cm.
- Manufacturer's 2 year guarantee.
- EAN: 8712930002413.
4.7
15 reviews
100%
Recommended this product
Each review is verified as authentic by our independent third party and we only publish reviews from customers or Argos Testers who have purchased or used the item. Customers are incentivised to submit product reviews as part of a prize draw.
Not loving it
We went for this one as we purchased the bundle, is not very intuitive. One side fixing is always very difficult to connect with the car hook, keeps closing. Makes a weird noise now that is all connected and being used
MariaRi, London
Fab narrow base
Easy to instal as just click straight into the car, makes it much easier for moving the seat in and out than using the belts. Lightweight and narrow, works great alongside 3 booster seats.
Finley, Fife
Really sturdy and secure
T he car base is really sturdy in itself. It was really easy to install and the prongs just push forward into the isofix of my car and clicked straight in. This felt really secure. Then the leg part lowered to the ground. I like how this part has a green part on it to tell you when it’s flush. 59 When placing the car seat on the base itself this also has a green part on it so it’s extra piece of mind to know that the car seat is definitely clicked into the seat and that made me feel more reassured and relaxed to drive. The instructions are ok the base itself so I could use that without even needing to really focus on the leaflet. Really happy with this as also fits the next stage up car seat.
null, Leeds
Great product and enhanced security for my baby
Our little family is super happy for choosing the Maxi Cosi FamilyFix S car seat base. Choosing the best car seat for my child is one of the most important decisions I have to make as a first-time mother, and it can occasionally feel overwhelming. I can honestly say that the Maxi-Cosi FamilyFix S has changed everything for me, my spouse, and of course my little one. To begin with, installation is very easy. It only takes a few clicks to install the ISOFIX system in my car, which is fantastic for me, especially when I'm completing multiple tasks in one day, like grocery shopping with a baby. I purchased a Maxi Cosi pebble car seat for my child, and the base fits it well. The instructions are quite simple. Naturally, my top priority is safety and now I can rest easy knowing my baby is safe because to the FamilyFix S's excellent safety features, which include side impact protection. It doesn't take up much room in my car and has a nice and simple design. It is very simple to clean. I'm super pleased with the Maxi-Cosi FamilyFix S overall. We required safety, comfort, and convenience, and it meets all of those needs.
Cristinam, London
Great product, excellent quality and reasonable price
As a parent, I always prioritize safety, convenience, and comfort when it comes to choosing products for my children, and the Maxi-Cosi FamilyFix S i-Size ISOFIX Car Seat Base delivers in all of these areas. I’ve been using this car seat base for several weeks now, and it’s clear that Maxi-Cosi understands what parents truly want when transporting their little ones: peace of mind and simplicity. Safety First: Every parent’s number one concern is safety, and the FamilyFix S i-Size base is packed with features that make me feel secure knowing my child is protected. One of the key things that stood out to me when choosing this base was that it adheres to the latest i-Size safety standards, which means it offers improved protection for my baby’s head and neck in case of an impact. It also allows for rear-facing travel for longer, which is known to be the safest way for children to ride. Another great feature is the support leg, which provides extra stability and prevents the car seat from moving in case of an accident. It’s adjustable to fit your car’s floor perfectly, and what I love is that it has both visual and audible indicators that let you know the base is installed correctly. As a parent, it’s such a relief to have that confirmation every time I install the seat, knowing that there’s no guesswork involved. Ease of Use: If there’s one thing every parent can agree on, it’s that we want things to be simple and quick, especially when wrangling little ones. The FamilyFix S shines here with its click-and-go system. This means no more struggling with seatbelts every time you get in the car—just click the car seat into the base and go. The car seat clicks in effortlessly, and there’s that reassuring “click” along with a green light that lets me know everything is secured properly. I also appreciate how the base grows with my child as I can use this same base from infancy until my child is ready for a booster seat. This versatility is a huge plus because it means I don’t have to invest in multiple bases as my child grows. Comfort and Convenience: It’s not just about safety—comfort is equally important, especially on longer drives. What I like about the FamilyFix S is how easily it reclines. When we’re going on a longer journey, I can tilt the seat back a bit more so my baby can sleep comfortably without slumping forward. It’s such a small adjustment, but it makes a huge difference in my child’s comfort, and in turn, makes the drive much more pleasant for everyone. No Compromise on Quality: The build quality of this base is exactly what I expect from Maxi-Cosi: solid, durable, and premium. It feels robust and sturdy, giving me the confidence that it’s built to last through multiple years of use. The material choices also reflect this attention to quality. There are no flimsy parts or cheap plastics—everything feels designed with longevity and safety in mind, which is something all parents want in products that protect their children. Final Thoughts: The Maxi-Cosi FamilyFix S i-Size ISOFIX Car Seat Base is truly a must-have for any parent who values safety, convenience, and comfort for their child. With its seamless installation, safety indicators, and ability to grow with your child, it checks all the boxes that matter most. It’s not just about transporting your baby—it’s about doing it in the safest, easiest way possible, and that’s exactly what this base provides. For parents who want a reliable, high-quality car seat base that’s designed with both safety and practicality in mind, this is an excellent investment.
Lien Tran, Woking
Great little base
Light, easy to install and neat in the car. This fits in with our other two children’s seats perfectly. Also love that it can also be used for future seats. This was a second base purchase, to have one in both mine and my husbands cars.
Bekka, Highlands, Scotland
Very safe and easy to set up
The Maxi-Cosi FamilyFix S, i-Size ISOFIX Base is a fantastic option for parents who want both safety and convenience. It provides great peace of mind, thanks to its strong safety features, making sure your baby is securely strapped in. The fact that it’s i-Size compliant is a big plus, offering extra protection, especially in the event of a side-impact collision. What really stands out is how simple it is to install. The ISOFIX system locks in place easily, and there are clear visual indicators to let you know everything is properly set up. This makes the process straightforward and allows for quick transfers between cars or seats without any hassle. One thing that could be improved is the fact that the base doesn’t swivel. It would have been helpful to have that rotation feature, making it easier to get your baby in and out, particularly in cramped spaces. As your baby gets bigger, this would save you some effort. All in all, the Maxi-Cosi FamilyFix S, i-Size ISOFIX Base is a reliable product that nails both safety and ease of use. If the lack of a rotating base doesn’t bother you, it’s a solid choice for keeping your little one safe while traveling.
bhavi1234, milton keynes
Car seat base suitable from birth to 4 Years
PURCHASED THE MAXI COSI FAMILYFIX CAR SEAT BASE BECAUSE I LIKE THE IDEA OF THE CLICK AND GO INSTALLATION FEATURE AND CAN BE USED FOR BOTH THE PEBBLE S CHILD SEAT REAR FACING FROM BIRTH TO 15 MONTHS AND THEN THE PEARL S CAR SEAT 15 MONTHS TO 4 YEARS CAN BE USED FORWARD FACING, SO ITS A BASE WITH LONGEVITY. ACCESSIBILITY IS A LITTLE AWKWARD AS HAVE TO LEAN INTO. OFFERS MAXIMUM SAFETY FOR MY GRANDCHILD. INSTALLATION ONLY TOOK A COUPLE OF MINUTES USING THE FOLD DOWN LEG AND ISOFIX CONNECTORS. PLUS THE SEAT HAS CLEAR INDICATORS WHICH TELLS YOU THATS ITS INSTALLED CORRECTLY. REASONABLY PROCED AND WOULD RECOMMEND.
ljsmith70, Chatham Kent
Maxi cosi
I am really pleased with this product, its so easy to install and remove into the car. The design it wonderful, and it is so robust and sturdy. It is so secure with no movement in the car as I'm driving. Would definitely recommend this to anyone with new burns.
Madalka39, Derby
Really easy to fit
I have been using this product for the last few weeks and its been great. Really easy to fix into place within tbe car seat and also to secure the baby seat too. It dont not move out of place. Engaging and releasing the car seat has not been a problem either. Wojld really recommend.
Shivali, Harlow
Hello Teri,
The supplier has advised the following for the Maxi Cosi FamilyFix S Isofix Car Seat Base:
"The red kite travel systems come with their own infant carriers" and also, "The Red Kite has its own base iDock Isofix base".
They add that this would/could not be suitable to use with a family fix S, and that "Other brand car seats are not compatible with our bases".
Thank you for using Q&A.
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The customer and brand answers you’ll see above are submitted independently. As we don’t review these answers, we can’t take responsibility for anything they may say. The responses from Argos colleagues are accurate at the time of publishing. For the latest info, you should check the product page.