Britax King II ATS Car Seat Review

As you may remember, we have recently been selected as Britax Mumbassadors and as part of our role we are incredibly lucky to try some of the new products. For the last couple of weeks we have been trying out the Britax King II ATS (active tensioning system) car seat through its paces and this is what we thought about it:
Britax King II ATS Car Seat

Britax King II ATS Car Seat

The girls (and Panda) absolutely loved sitting in the seat!

The look of the seat:

Britax King II ATS Car Seat      Britax King II ATS Car Seat    Britax King II ATS Car Seat


The Britax King II ATS Car Seat is a forward facing group 1 car seat which is recommended from 9kg up to 18kg (usually approximately 9 months to 4.5 years but all children are different so make sure you check your child’s weight before purchase) and it’s dimensions are 67cm height, 45cm width and 54cm depth. When designing the seat, Britax were aware that toddlers wriggle around whenparents strap them into their car seat, meaning the harness might not necessarily be as tight as it should be from the offset. However, KING II ATS features a unique Active Tensioning System (ATS), which automatically adjusts and retracts the slack in the child’s harness to keep tension just right throughout the journey. The car seat weighs 10.3kg and has a 5 point safety one pull harness.

Britax King II ATS Car Seat


I have never had a Britax car seat before so I have no comparison but when we got it out the box I absolutely loved the look of the seat. I loved the white base and side – I know it sounds shallow but it definitely had a wow about it visually. I struggled to lift it out of the box as it is very heavy but in all fairness once the car seats are in my car they very very rarely are moved so that’s not rally an issue for me as I won’t be taking it out regularly. The seat had a good amount of padding for the girls to be sitting on and also around the neck making it comfortable for travelling. It was easy to put the buckle together and click into place as they easy fold over each other and click straight in.


It is ridiculously simple to install. Our other car seats you have but I couldn’t believe how easy the King II ATS actually is to install. How do you install and fit the Britax King II ATS Car Seat ? Simple. You put it in the car, tilt the seat forward

Britax King II ATS Car Seat

and lie the seatbelt across the two red catches either side,

Britax King II ATS Car Seat

and strap it against the Britax sign clip on the side plug, it in and the push the seat back to its original position  and it goes CLICK and hey presto – done in next to no time! No fishing seatbelts through and hooking them into place – beyond simple.

Britax King II ATS Car Seat

I often worry about how safe a sea is so I ALWAYS have to give the seat a really good shake to see if it wobbles and I can confirm it certainly passed my shake test as it did not move. My husband also commented on how solid it was when in the car so it really must be good!
Another massive massive thumbs up from me is the red/green light and sound indicator;

Britax King II ATS Car Seat

Britax King II ATS Car Seat

She’s very happy when it bings green!

you can be certain that your child is correctly fitted into the seat as once they are strapped in you pull the harness and it will go green and make a funky BING noise to let you know all is good. If for whatever reason during your journey your child manages to escape their arms, undo the buckle or there’s a change in tension it will turn red and beep loudly at you to let you know that you need to check as they’re eno longer safely strapped in. This for me is perfect as P2 is a nightmare are keeping herself in her seat during journeys and absolutely loves to wriggle her way out so this is incredibly handy to so I don’t need to keep having to check she’s properly in.

Britax King II ATS Car Seat

It is also very easy to adjust the head height (which also means the shoulder strap height) with one simple button to pull it up or down. I have always had seats where you have to undo the straps and realign so this is great for me especially with twins as I don’t always put them in the same set car seat/side and as P1 is a bit bigger than her sister it is really simple to adjust the height as and when is needed. The seat reclines easily with a single pull which I managed to do when they were asleep and didn’t wake them – always good news!


As I said before, it is very heavy but I think you will struggle to find a group 1 seat that isn’t heavy and as I don’t need to be moving it about much I can’t see it being much of an issue. I did worry that it may be too large for our car as we have to have two group 1 seats plus Charlie’s booster but they all fitted in fine (we have a Honda CRV) and I realise a lot of families won’t have as many car seats in the back as ours!

Britax King II ATS Car Seat

Lots of space (plus my car needs vacuuming!)


I did for the first few times struggle to release the silver tension button which loosens the straps as you have to slide your finger in and push it quite hard but once I got to grips with it I was used to it.

Britax King II ATS Car Seat


The Britax King II ATS Car Seat is currently priced at £180 and with the colour/sound features, te feeling of how incredibly safe it felt when strapped in plus the sleek design and comfortable padding I think it’s priced perfectly. It’s a higher end of the market but for the extra cash you definitely can see and feel the extra quality for yourself. With two little Houdinis on my hands I have found that the ‘alarm’ bleep gives me extra peace of mind when I am driving them that they aren’t escaping and running loose in the back. Batteries for the light system are included and are expected to last approx. 7 years but obviously I can’t comment on that!

All in all I would definitely recommend this to anyone who is looking to spend that little bit more on a car seat as it provides comfort, safety and it watches over your little one(s) throughout the journey which is what all parents really want from a car seat – oh and it looks pretty awesome too which is never a bad thing eh?! You can find out more information at the Britax website or the Britax Facebook page and can be purchased from Mothercare.

B xx

Disclosure- we were given one Britax King II ATS car seat in exchange for this honest review; all words, views,  pictures and babies are my own

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  1. 16th March 2015 / 11:23 am

    Osian’s got a Brirax car seat. I find it so heavy, but it’s such a good car seat that I don’t really mind. Plus like you it’s hardly taken out the car. The light feature and the adjusting straps sounds great! Glad Panda gave the seal of approval of the seat too 🙂 xx

  2. 17th March 2015 / 2:59 pm

    We have Britax Evolva car seats that have been fantastic – huge fan of Britax for car seats. This looks great though – I love how it straps in and the light feature. Great review x