Cybex Base S

Meet the only car seat base you’ll ever need. Designed for busy families, this modular base gives you full flexibility: rear- and forward-facing travel, compatibility with three different seats, and use from newborn through age seven.

It’s built to last, straightforward to install, and makes every car trip easier. Switch directions and use the same trusted foundation for rear-facing safety in the early years and forward-facing comfort as your child grows. Easily rotate the seat toward the car door for fast, stress-free loading and off-boarding, especially when you’re juggling a baby and bags.

Make car travel easier, safer, and more flexible. One durable base. Countless journeys.

Freedom of choice

One base. Two directions. Up to 7 years of flexibility. The Platinum S-Line Modular System grows with your family from birth to approximately 7 years while allowing you to keep using the same Base S. Start with the Cloud S infant car seat, then choose the Sirona S for extended rear-facing travel or the Anoris S Airbag for forward-facing protection with integrated full-body airbag technology. Whichever path you choose, you benefit from exceptional safety, seamless compatibility and long-lasting value.

360° Rotation

The Base S offers smooth single-hand rotation—180° for Cloud S and Anoris S Airbag, 360° for Sirona S—so parents can board and off-board with ease while juggling a baby and bags. One-handed operation and gentle side-entry make loading easier for both child and parents, reducing awkward lifting and making it easier to position your child and secure the harness correctly.

LED Safety Indicators

A car seat can only protect if it’s set up right. The onboard safety assistant of the Base S helps you install the seat and get your child secure every time. LED indicators show the status of the ISOFIX, load leg, impact shield and battery. Check that your child is safe at a glance and start your drive in confidence.

Made to last - Newborn to 7 years

Safety that stays with your baby from birth until around 7 years old. Easily switch between the Cloud S infant seat, the unique forward-facing Anoris S Airbag and the rear-facing Sirona S. All car seats grow with your child. Built with durable materials and smart engineering for lasting strength through daily use and multiple kids. Ideal for parents seeking a safe, quick-to-install, and easy-to-use long-lasting car seat solution.

ISOFIX easy installation

Base S makes car-seat installation fast, safe and stress-free. It uses ISOFIX anchors and a height-adjustable load leg for a rigid, stable connection and reduced movement in a crash. Parent-friendly, colour-coded ISOFIX release buttons and clear indicators guide quick, reliable setup—secure your seat in minutes with confidence.