In-Depth Review of the CYBEX Sirona S (2023)

Innovative Swivel Design with Advanced Safety

Last Updated on 2023-11-15

This comprehensive review will provide an in-depth look at the CYBEX Sirona S. We'll analyze the key features, real owner experiences, who this seat is ideal for, and technical specifications to help you determine if this is the right car seat for your family.

Current Price Seller
In stock
$399.99 Shop


Offers advanced features and long-term use from infancy to toddler years, making it a cost-effective option despite its higher price point.


Integrated with SensorSafe technology and enhanced side-impact protection, providing top-tier safety for children.


The 360° swivel design, magnetic buckle holders, and adjustable recline options set it apart from standard car seats.


Installation can be challenging, with some parents finding it complex and time-consuming.


The seat cover is removable and machine washable, simplifying the cleaning process.


While it’s not the most compact, its design accommodates growing children, balancing size with comfort and safety.

Key Information

Type Convertible

Rear-Facing Forward-Facing
Weighted Rating 4.03 / 5.0

Product Overview

The CYBEX Sirona S Car Seat

The CYBEX Sirona S is a convertible car seat designed for both rear and forward-facing use. It's renowned for its unique 360° swivel feature, enhancing convenience for parents when placing their child in the car. The seat is equipped with advanced safety technologies, including SensorSafe technology and a load-bearing leg for added stability.

Key Features

What features set this car seat apart from others?

  • 360° Swivel Function: Unique feature for easy placement of the child.
  • SensorSafe Technology: Offers critical safety alerts by connecting to an app on your smartphone and alerting you about potentially dangerous situations (heat, safety harness, child left in car, etc.).
  • Enhanced Side-Impact Protection and steel frame ensure maximum safety.
  • Adjustable Recline and Headrest: Provides comfort for growing children.
  • Magnetic Buckle Holders: Adds convenience during buckling.

What Real Owners Think

Here's what actual owners of the CYBEX Sirona S had to say based on hundreds to thousands of reviews we've analyzed from Amazon.

Pros Cons
  • Convenience of Swivel Feature: "The 360° swivel is a game-changer for getting my child in and out," a parent commented.
  • Comfort and Quality: Many reviews highlight the comfortable padding and high-quality materials.
  • SensorSafe Technology: Offers peace of mind with automatic safety alerts whenever an unsafe situation arises.
  • Ease of Adjusting Straps: Simplifies the process of securing the child.
  • Installation Challenges: "Installation was complicated and frustrating," one review noted.
  • Swivel Mechanism Issues: Some users experienced difficulty with the swivel function.
  • Size and Weight: Its bulkiness may be a concern in smaller vehicles.
  • Price: A few parents considered it expensive, though most found the features justified the cost.

Who Should Buy the CYBEX Sirona S?

The CYBEX Sirona S is an excellent choice for parents who prioritize safety and innovative features in a car seat. It's especially suitable for those who appreciate the convenience of the 360° swivel function, making it easier to get children in and out of the car. This feature is a boon for parents with back issues or those who frequently park in tight spaces. Moreover, the car seat's adaptability from infancy to toddlerhood makes it a practical, long-term investment for families. It's an ideal fit for those who are willing to navigate the initial complexity of installation for the substantial safety and convenience benefits offered in the long run. The CYBEX Sirona S, with its blend of comfort, advanced safety technology, and user-friendly features, stands out as a top choice for discerning parents looking for a reliable and versatile car seat solution.

Final Verdict

The CYBEX Sirona S is a top-tier convertible car seat that excels in safety, features, and convenience, particularly with its swivel design. While installation may be challenging for some, the overall benefits, especially in safety and ease of use, make it a highly recommended choice for parents seeking a reliable and innovative car seat solution.


Allowable Height and Weight Ranges

Height Range Weight Range
Rear-facing 17 - 49 inches 4 - 50 pounds
Forward-facing 28 - 49 inches 22 - 65 pounds

Dimensions and Weight

Width 20.0 inches
Height 25.5 inches
Depth 25.3 inches
Weight 30.4 pounds

Core Specifications

Model Year 2021
Made In China
Frame Material Reinforced Steel

Safety and Compliance

Federal Safety Standards Meets all standards
Configurations FAA-Approved for Airplanes Rear-Facing
NHTSA Ease-of-Use Ratings
These ratings let you compare how easy it is to use certain car seat features. They are not a reflection of car seat features being better or safer.
Rear-Facing Mode
Overall 5 out of 5 stars
Labels 5 out of 5 stars
Instructions 5 out of 5 stars
Securing 5 out of 5 stars
Installation Features 5 out of 5 stars
Forward-Facing Mode
Overall 4 out of 5 stars
Labels 4 out of 5 stars
Instructions 4 out of 5 stars
Securing 5 out of 5 stars
Installation Features 5 out of 5 stars
Previous Recalls This car seat has never been recalled.


Attachment Methods LATCH
Harness Type 5-Point
Cup Holders Has cup holders.

Warranty and Durability

Manufacturers Warranty Length 2 years
Lifespan 10 Years

Additional Links

See all CYBEX car seats
See all Convertible car seats

Current Price Seller
In stock
$399.99 Shop