CYBEX Platinum · S-Line Modular System
One base. Three car seats. Countless journeys from birth to approximately seven years. The CYBEX Base S provides a versatile foundation for the Cloud S, Sirona S and Anoris S Airbag, combining straightforward ISOFIX installation with convenient seat rotation.

Feature 01
Seamless transition with freedom of choice
One base. Two directions. Up to seven years of flexibility. The Platinum S-Line Modular System lets you use the same Base S with three different car seats. Start with the Cloud S infant car seat from birth. Later, choose the Sirona S for extended rear-facing travel or the Anoris S Airbag for forward-facing travel with full-body airbag technology.

Feature 02
One-handed car seat rotation
Rotate a compatible car seat on the base with one hand: 180° for the Cloud S and Anoris S Airbag, and 360° for the Sirona S. Turning the seat toward the car door makes it easier to place your child in the seat or lift them out.

Feature 03
Central LED indicators
Correct installation is essential for car seat protection. The Base S onboard safety assistant helps you check the ISOFIX connectors and load leg, as well as the impact shield and battery status when using the Anoris S Airbag. The LED indicators provide convenient visual feedback before setting off.

Feature 04
ISOFIX and adjustable load leg
The Base S uses ISOFIX connectors and a height-adjustable load leg to create a stable installation. Color-coded ISOFIX release buttons and clear indicators make setup easier and help you check that the base is installed correctly.

Feature 05
From newborn to approximately seven years
Designed to support family journeys over several years, the Base S can be paired with the Cloud S first, followed by the rear-facing Sirona S or forward-facing Anoris S Airbag as your child grows. Each car seat has its own age, height and weight limits.
Compatibility
Actual suitability depends on each car seat’s approved size and weight range.
Frequently asked questions
The Base S is designed for the CYBEX Cloud S, Sirona S and Anoris S Airbag. Always check the specific product's compatibility guidance before use.
Yes. The Cloud S and Anoris S Airbag support 180° rotation, while the Sirona S supports 360° rotation when used with the Base S.
The Base S is installed using ISOFIX connectors and an adjustable load leg. LED indicators help you check the installation status. Follow the user guide and verify compatibility with your vehicle.
No. This product includes the Base S, Base S adapter, batteries and user guide. Compatible car seats are purchased separately.
CYBEX Base S Isofix Car Seat Base is included in these categories: