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Allowing recommended rear-facing travel from birth up to 105cm (approx 4 years old), the Sirona M2 i-Size Car Seat (with Base M) from Cybex also allows forward facing travel from approx 16 months / 76cm.

As this version of the Sirona M2 i-Size comes complete with Base M, it benefits from one-click ISOFIX installation (for both rear and forward facing positions) and requires no further fastening. An safety indicator also helps to prevent improper installation for priceless peace of mind.

Complying with the new stricter ECE R-129 (i-Size) regulations, the Sirona M2 features the integrated linear side-impact protectors (L.S.P. System) which fold out on the side facing the door, reducing the force of a side-impact collision at a very early stage of impact.
The car seat now has an easy to use click-in system which allows for simple change between rear-facing and forward facing ride positions. 
With a 12 position height-adjustable headrest (and a harness that automatically adapts too), the Sirona M2 cleverly grows with your child and offers 5 recline positions in rear facing mode and 3 in forward facing mode which can be achieved with the use of just one hand.

Monitoring the well-being of your child whilst the vehicle is in motion, Sensorsafe is a new integrated 'smart' chest clip that is synced with the installed vehicle receiver and the caregiver's mobile phone. 
Sensorsafe is designed to alert you if a child is no longer safe in their car seat. Alerts are produced if a child manages to unbuckle themselves whilst the car is in motion, if the seat has become too warm or too cold, if a child has been seated for too long and even if the driver accidentally leaves the child behind in the car. All alerts are displayed through a user-friendly app, which also provides guidance on installation, how-to videos and much more.


  • Suitable from birth - 105cm (approx 4 years)
  • Rear facing: From birth - 105cm
  • Forward facing: From 76 - 105cm
  • Integrated SENSORSAFE smart clip technology monitors the well-being of the seated child
  • Integrated L.S.P. System
  • One-hand recline function (rearward facing: 5 positions; forward facing: 3 positions)
  • Energy-absorbing shell: Absorbs the forces of an impact and protectively covers the baby
  • Height adjustable headrest (12 positions)
  • Integrated harness guides
  • Fabric covers machine washable at 30°
  • Engineered and designed in Germany
  • Can only be installed in vehicles with ISOFIX anchorage points
  • Includes Base M (ISOFIX)


  • length / width / height : 720 / 440 / 660 mm
  • weight: 14 kg

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