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Cybex Sirona M2 i-Size Car Seat


The Cybex Sirona M2 i-Size is a car seat that’s fully adjusted to the ECE R129 regulations. Your baby faces backwards to travel safe.

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Please note: the ISOFIX base (Base M) for the Cybex Sirona M2 i-Size is not included. The base is sold seperately. 

The Cybex Sirona M2 i-Size is suitable for children from 45-105 cm. (±0-4 years) and is fully adjusted to the European regulations (ECE R129) for car seats. The new regulations state that children have to be faced backwards in a car seat until they are 15 months old. This is considered the safest way of travelling so the Cybex Sirona M2 i-Size is a very safe and responsible car seat to go for.

Intelligent design

The intelligent design makes sure that taller children also have enough leg space to sit comfortably in a backwards position. The smart design also makes it possible to install the seat in smaller cars without any problem. From 16 months and 76 cm. it’s possible to turn the car seat forward.

Linear Side Impact Protection

The Cybex Sirona M2 i-Size features the telescopic Linear Side Impact (L.S.P.) system. This reduces the force of a side impact collision in combination with the energy absorbing shell. The flexible texture of the material of the shell reduces the force of an impact and protectively covers the baby. The 12-position height adjustable headrest offers perfect protection and grows with your child. This way your baby’s head will always be safe in between.

M-line modular system

The Cybex Sirona M2 i-Size is part of the Cybex M-line Modular System together with Cybex Aton M i-Size and the Cybex Base M. You mount the Sirona M2 i-Size and Aton M i-Size on the Cybex M Base in your car. One ISOFIX base for two car seats – easy and convenient.


  • suitable for children between 45-105 cm. (±0-4 years)
  • integrated L.S.P. system
  • headrest adjustable in height with 12 positions
  • expandable with SensorSafe technology
  • optionally faced forwards
  • maximum weight: 19 kg.
  • meets the requirements of the ECE R129 regulations
  • compatible with the Cybex Base M (ISOFIX base)
  • part of the modulare M-line system (Aton M i-Size, Sirona M2 i-Size and Base M)
  • clicking system to change seat position
  • removable fabric can be washed at 30°C
  • dimensions: 66 x 44 x 45,5 cm.

Additional information


Deep Black, Granite Black, Soho Grey


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