Cybex Sirona M I-Size Car Seat Review

Cybex Sirona M I-Size Car Seat Review


As the name would suggest the all new Cybex Sirona M i-Size Car Seat is Cybex’s latest model that fully complies with the European i-Size regulations. If you’re new to child car-seats or are still not entirely sure what these regulations mean, you can check out a complete and in depth breakdown here.

Product Features and Accessories


The seat itself boasts a number of features aimed at ease of use, such as it’s one hand recline system that offers 5 positions when rearward facing and 3 when frontward. This allows seamless and simple adjustment to the seat as you find the perfect travelling angle. Adjusting the straps happens from the same area by pressing your thumb onto the release switch inside the strap hole that can be found just above where you grab for the one hand recline.


Cybex Sirona M i-Size stran adjuster button

Cybex Sirona M i-Size Car Seat Harness Adjustment


Another convenient feature of the Cybex Sirona M i-Size is it’s magnetic harness clips, allowing easier access to your child, no more fumbling around with the harness straps whilst transporting your baby to and from their car-seat.


Cybex Sirona M i-Size magnetic clips

Cybex Sirona M i-Size Car Seat Magnetic clips


Cybex Sirona M i-Size magnets with harness

Cybex Sirona M i-Size Car Seat Magnetic clips in use.


The Cybex Sirona grows with your child, rearward facing up to 105cm tall (approx. 4 years) with a frontward facing option once your child reaches 76cm, (approx. 16 months) You can easily achieve this with the use of “click in” system. Furthermore the headrest can be adjusted to 12 different heights and it’s clever design maximises leg-room without sacrificing car space reducing your child’s discomfort as they grow. The Sirona reaches a total weight of around 14KG.


Above all, a child seat should be safe and you can be sure Cybex made this a priority with the M i-Size. The extended supporting arm reaches down into the footwell securing the seat and adding extra stability to the child’s journey.


Cybex Sirona M i-Size supporting arm

It’s also fitted with an LSP system or Linear Side Impact Protection system that spreads out any force from a side on collision maximising safety for your child. These fold out from the main seat shell towards the door and clip back in when not in use.


Cybex Sirona M i-Size closed LSP system

Cybex Sirona M i-Size open LSP System

To add further peace of mind the shell of the seat is energy absorbing and fits comfortable around your child offering further protection.


The Sirona M i-Size Car Seat requires ISOfix points in your vehicle for installation so it’s best to check your car’s compatibility before deciding to purchase.

To secure the seat to your vehicle you need to press two buttons either side near the bottom of the seat and slide out the extending ISOfix arms. These extending arms ‘grab on’ to the ISOfix points of your car toggling green to show.


Cybex Sirona M i-Size ISO Fix Arms

ISOFIX arms grabbing points

Once the seat is firmly secured the supporting arm can be lowered into the footwell. Upon securing both the seat and the supporting arm, green signals will show at the top of the arm.

Cybex Sirona M i-Size secure system signal

Secure signal


Britax offer a range of car accessories to accompany their car seats. The Britax Back Seat Mirror provides you with reassurance of being able to view your baby at any angle whilst travelling. The Britax Car Sun Shade is perfect for keeping baby cool and comfortable whilst travelling. The Britax Car Seat Protector prevents slippage and protects your car seat.


Where To Buy  £350  greenticksmall

Mothercare  £375

John Lewis  £375


Prices accurate as of July 2016

Comments are closed here.