»Is this the right seat for my car?«

Sirona M2 i-Size

from birth - 105 cm, up to approx. 4 years

The Sirona M2 i-Size was tested with the Base M i-Size.

Sirona M2 i-Size rear-facing car seat

Safely rear-facing until your child reaches 105 cm in height

The new CYBEX Sirona M2 i-Size complies with the new European requirements and regulations for car seats ECE R-129. This new "i-Size regulation" states that children aged 15 months and under must travel in a rear-facing infant car seat, which is seen as the safest mode of transport by many experts, including consumer and health organisations such as Which?, the ADAC and the German independent consumer testing organisation Stiftung Warentest.

When using the CYBEX Sirona M2 i-size, the child can be transported in a rear-facing position from birth until they reach 105 cm in height (approx. 4 years). The new, intelligent design means that even taller kids have plenty of leg room to sit comfortably. But it doesn‘t take up too much space either – the Sirona M2 i-Size can be easily installed in smaller cars. Additional features such as the one-hand reclining function provide extra convenience and make everyday use easier.


  • Energy-absorbing shell - Absorbs the forces of an impact and protectively covers the baby

    Energy-absorbing shell:
    Absorbs the forces of an impact and protectively covers the baby

Engineered in Germany

length / width / height: 720 / 440 / 660 mm
weight: 14 kg
UN R129
Fabric covers machine washable at 30°
Engineered and designed in Germany

Compatible Cars

Is this the right seat for my car?

The installation of our products is extensively tested in the latest vehicles. However, we always recommend a test installation at a qualified retailer to confirm individual compatibility. Especially the length of the vehicle belts or ISOFIX (US: LATCH) anchorage points may vary, even during a production run of a car manufacturer.

Your CYBEX Product

Base M

Car manufacturer

Model Year Installation position


Downloads: manuals