Britax Advansafix Car Seat // Review (2015)


As part of the Britax Mumbassador scheme, we have had the great pleasure of testing out one of their forward facing installation car seats, the Advansafix.

AdvansafixThe Advansafix is a multi group car seat (Group 1/2/3) and is designed to grow with the child. The car seat can be used from 9kg (around 9 months old) up until the child is 36kg (around 12 years old). Being able to buy a car seat that will see your child through their childhood is a huge selling point for me. No need to buy another car seat when they grow out of a particular stage, with the Advansafix you just modify the car seat to suit the group the child is in.

For children under 25kg, the five point safety harness provides ultimate protection with the performance chest pads reducing forward movement when strapped in. For children between 15kg and 36kg, the harness can be removed and the seat can be used with a seat belt.

Features of the Advansafix

Britax Advansafix

The Advansafix is full of great features that I really like and provides ultimate protection for Little Mr.

– 5-point safety harness used until the child reaches 25 kg or they have outgrown the harness
– Ultimate installation for all ages – ISOFIT+ with Top Tether and 3-point seat belt
– Multi-position recline – perfect for snoozing little ones
– Performance chest pads and Pivot Link system help to reduce forward movement
– Deep, softly padded side wings for ultimate protection
– Height adjustable headrest and harness with one-handed adjustment
– Quick remove cover, no need to remove harness

Installing the Advansafix

I am a huge fan of ISOFIT. I really like how the seat is attached to the car using the ISOFIX points and the green indicators on the Advansafix car seat provide reassurance that the car seat is fitted correctly.

The Advansafix also has a Top Tether which gives an additional element of protection for the child in the seat. Make sure to check with your vehicle user guide of where the car tether point is in your make of car.

Britax recommend that Parents use the vehicle belt when using the car seat for children in Group 1 and 2. The seat belt is threaded through the back of the chair and adds another element of security for the child.

This useful guide from Britax shows the recommending fixing points for the Advansafix.

Britax Advansafix
The video below is also a great run through to show you how to install the Advansafix in the car.

What we think of the Advansafix

Britax Advansafix

We have been using the Advansafix in our secondary car for many months now and we really like it. At first I didn’t get on with the harness as I found it really difficult to pull the straps tight enough to provide suitable protection for Little Mr. This was soon sorted as I removed the car seat from the car and adjusted the shoulder straps. I would recommend doing this as soon as you notice your child to have had a growth spurt to ensure the straps are not only comfortable for the child but also provide adequate protection.

We have had to adjust the headrest to suit Little Mr and will continue to do so on an ongoing basis.

We are currently using the Advansafix in Group 2 mode with the 5 point safety harness, the top tether is secured and the seat belt has been threaded through the back of the seat. We will continue to use the car seat in this mode until the harness no longer fits around Little Mr.

Top Tether Advansafix

We really like the multi position recline on the seat as Little Mr is notorious for falling asleep on the way home from my Parents house. I recline the seat before we set off and know that he is going to be comfortable for the 45 minute drive home.

As with all car seats, I would highly recommend spending some time getting to know the features of the car seat to make sure you’re using it to its full capabilities. I love the Advansafix multi installation protection system as it gives me peace of mind knowing that the seat is installed correctly. We will be using the Advansafix in my car for many years and hope it will continue to provide ultimate protection for Little Mr on our travels.

The Advansafix is available in a choice of colour ways; chili pepper, black thunder, crown blue, dark grape, smart zebra. We have the car seat in Chili Pepper.


Available from £225 at all major car seat retailers. For further information on where to buy the Advansafix, check out the Britax website here.

You can also download user instructions and the list of vehicles the Advansafix is suitable for on the Britax website here.


We have also reviewed the Dualfix rear facing car seat here which is used in our main vehicle.

Disclaimer: We were sent the product as part of the Britax Mumbassador Scheme. All words are my own and this forms an honest and reliable review. 

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  • Reply Cathy (MummyTravels) 28/07/2015 at 9:19 am

    I love the idea of a seat which can adapt for the different ages – getting one always seems to be so confusing and such a mission to work out the perfect solution, especially when they cost so much, so I’d be very happy to only do it once as well! #triedtested

  • Reply Sian @ QuiteFranklySheSaid 28/07/2015 at 11:42 am

    What a reasonably priced car seat! I’m currently looking for a new one for J, it is a minefield! #triedtested

  • Reply Kim Carberry 28/07/2015 at 1:34 pm

    That looks really great….It sounds really comfy x

  • Reply Hannah Atkinson 28/07/2015 at 3:24 pm

    The seat looks really nice and I like the extra tether. I wish they were concentrating on ERF seats though. We have the Britax Multitech II and love it. My 3.5yr old can rear face until 6 I hope

  • Reply Donna 28/07/2015 at 11:02 pm

    This car seat looks amazing. We have the Evolva 1-2-3 and loved it so much we bought a second one but this looks great too, love a 1-2-3 seat x

  • Reply Loving life with little ones 12/08/2015 at 8:50 pm

    t, the idea of being in a 5 point harness until 25kg appeals to me and a great price too.

  • Reply aNoviceMum 20/08/2015 at 12:01 pm

    Love that you can adjust the headrest and recline the seat. Obvious good product and the price reflects it. #TriedTested

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