Maxi-Cosi FamilyFix Car Seat Base

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Product information

The Maxi-Cosi FamilyFix car seat base features an ingenious light and sound LED display to rule out any incorrect fitting, ensuring absolute safety.

The first green light signals the correct fit of the base onto the IsoFix anchoring points in the car.

The second light confirms that the support leg has been clicked into the right height and position.

Finally, the third green light gives parents the all-clear that the Maxi-Cosi Pebble (Group 0+, sold separately), Maxi-Cosi CabrioFix (Group 0+, sold separately) or Pearl (Group 1, sold separately) car seat has clicked securely onto the base.

Three green lights and one beep tells you you’re safe to go!

Compatible with Maxi-Cosi CabrioFix, Pebble and Pearl infant carriers and car seats. 


Under no circumstances should a car seat be used on a passenger seat where there is an airbag.
Correct fitting of all car seats and boosters is of paramount importance to make them most effective in the event of an accident.
Not all car seats or bases fit all cars and it is important to check for fitting suitability on all cars you intend fitting the seat to, as well as re-checking if you change your car.
Always read the instruction booklet which comes with your car seat to achieve a safe and correct fitting, retaining the guide for future reference. We recommend fitting your car seat in advance of first using it.
We recommend that babies shouldn`t be left in Group 0/0+ car seats (infant carriers) for prolonged periods.


Please make sure that you check the car seat or base you choose is suitable for your car before ordering.
Some of our shops offer a car seat fit test, where a Nursery advisor will test the display model in your car to check that it will fit properly. Please contact your local shop to see if this service is available. Alternatively, please contact the car seat manufacturer who will be able to advise whether their model will be suitable for your car.
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H48-65 x W35 x D55cm
Eligible for International Delivery


Click & collect

Free Click & Collect from John Lewis and Waitrose shops for collection Tuesday from 2pm
261 participating John Lewis and Waitrose shops

Standard UK delivery within 5 working days


Next, named or Saturday UK delivery.


Next/named day UK delivery pre-10.30am.


International delivery available

  • Europe (Non EU) - £7.50
  • Europe (EU) - £7.50
  • Rest of World - £25.00
Provided by JL Delivery Ltd - more about international delivery
From  £7.50


We want you to be happy with your purchase. If you're not, just return the products to us or to one of our shops. Unless faulty, we'd like this to be within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.

Depending on the type of product, you can make free returns via our shops, Royal Mail (or courier collection for large or heavy items), Collect+ or via MyHermes.

Find out more about returning products

Q & As


Maxi-Cosi FamilyFix Car Seat Base 4.8 5 37 37
Best baby purchase ! I purchased this maxi cosi family fix base for my newborn on the advice of a friend. I am so glad I did. Base was very easy to fix in the car and 3 lights indicate that the base is secure to the isofix points in the car, the leg is secure to the floor and a third to ensure seat is correctly secured to base. There is also an audible bleep to let you know that these points have been met. It is eas to fit and can be used for the second stage seat as well so very good value for money. So much easier than putting a seat belt over car seat and worrying it is not secure. Would definitely recommend this product 26 March 2014
Knowing our little one travels safely Have just started to take care of my grandson two days each week. Needed a car seat for my car decided to purchase a Maxi cosi family fix base plus Maxi cosi pearl seat as both my son and daughter in law have these products and are very pleased with easiness of use when using pebble car seat( first car seat )and now pearl car seat plus knowledge that our little one is safe when travelling.Would recommend these products to all parents and grandparents. 18 February 2014
Peace of mind Easy to use and really practical ensuring the seat is secured. 11 February 2014
An absolute baby must-have I know this item is not cheap, and I too (like you may be now) debated whether or not we needed it. However, trust me when I say this is a baby must-have. Not only does the Isofix offer additional peace of mind in terms of safety (God-forbid you should ever have an accident), but the ease of getting my baby in and out of the car is faultless with this base. It pays for itself very quickly. One click and baby is secured. No messing about with a seat belt. 03 February 2014
Safe and secure Bought this Isofix base to accompany the Maxi Cosi Pebble car seat. At first, we debated on how much we needed one, particularly as we live abroad and have the usual limited amount of kg allowance to bring items from the UK. However, both my husband and I were not sure about using the safety belt to secure the car seat in place and, after seeing an in-store demo with the base, we were convinced that it was an essential. The really good thing about this base is that it can accommodate different car seats and as your child grows, the seat may change, but the base stays the same so it's worth the price. Follow the picture instructions for installation and it's quite straightforward. Car seat clicks into place easily and base lights up to confirm if it's properly connected. 22 October 2013
God send! A must have! So easy, safe and convenient to use. I am thinking of buying a second one to save time swapping the car seat between the two cars.... 15 August 2013
Very easy to set up and use I brought this product as I couldn't trust myself to install my baby car seat safely everytime using only the seat belt. Although this is a added extra to child travel, it gives you a peace of mind when traveling with young ones. I like the fact this will also fit the next car seat up so you get 4 years worth out of it. It was very easy to set up. Once it is in the car, there is no need to adjust it unless the lights on the front goes off. Batteries also come with it. Very sturdy made and this is one of the 'gadgets' which I think is well worth the money. John Lewis delivered fast again and their prices were the best. 07 June 2013
A must-have for peace of mind and increased safety We are really pleased with this base. Its safer than attaching the car seat by seatbelt because it attaches to the body of the car itself - much more secure. The additional safety features of three lights that glow green to tell you that the base, support leg, and car seat are fitted correctly, along with a confirmation beep, are fantastic. As this was our first child we had never used a car seat before and it can all seem rather complicated but with these features it was so easy to tell everything was fitted correctly and safely. This car seat base is so easy to use and we highly recommend it. 16 January 2013
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