Cybex Sirona S 360 Rotational Convertible Car Seat with SensorSafe



The Cybex Sirona S is the convertible car seat that protects your child and your back. The car seat rotates 360 degrees, allowing you to rotate the seat toward your car door while helping your child in and out.

Because the Sirona S can swivel from rear-facing to forward-facing, you may only need to install it a single time using the vehicle seatbelt and EasyLock system for a simple and secure installation.

The Cybex Sirona S is also the only American convertible car seat with a load leg, a metal bar that extends from the base of the seat to the floor of your car to inhibit movement and prevent head injury.

Energy-absorbing pods that extend from the sides of the seat to absorb 25% more forces in a crash, while SensorSafe technology integrated into the chest clip sends safety alerts to both a vehicle receiver and a smartphone. The alerts notify parents to potentially dangerous situations, like a child being left in a car, an unbuckled chest clip, unsafe temperatures or a child seated for too long.

With features like a no-rethread harness, included cup holder and numerous recline positions, the Cybex Sirona S offers the ultimate in convenience and safety for your child from birth to 65 pounds.



  • Only convertible car seat on the market that swivels 360 degrees using one hand for easy access in and out of the seat
  • Load leg extends from the base of the seat to the floor of your car to stabilize the car seat in the event of a collision
  • SensorSafe 2.0 technology integrated into chest clip (see next section for more details)
  • Can be used rear-facing and forward-facing up to 65 pounds
  • Tubular steel frame provides structural strength and a pathway to channel crash forces away from child
  • Adjustable linear side-impact protection absorbs up to 25% more forces in a side collision
  • Energy-absorbing EPS shell, as used in crash helmets, reduces forces to baby in a crash
  • Reclines using one hand to 8 positions rear-facing and 4 positions forward-facing
  • Belt holders make it easy to get child in and out of the seat
  • Removable infant insert provides support for 5-22 pounds
  • Can be installed using vehicle seat belt using patented EasyLock bar (recommended) or LATCH
  • Harness pads with anti-slip backing and comfort-padded buckle cover ensure a comfortable fit
  • 5-point harness
  • Tested to NHTSA and German ADAC safety standards
  • Designed and engineered in Germany

SensorSafe Technology Features

  • Chimes if child is still secured in seat when car is turned off
  • Alerts caregiver's cell phone if child is left behind in vehicle and then, if situation is not remedied, alerts designated emergency contact
  • Emergency contact receives GPS coordinates of vehicle's last known position
  • Monitors back seat temperature to alert vehicle receiver and caregiver's phone if car appears to be too hot or too cold
  • Provides alerts to caregiver when child may have been seated for too long
  • Receiver plugs into car's OBD port and syncs with caregiver's cell phone
  • App available for iOS and Android


  • Dimensions: 25.5"H x 20"W x 25.3"D (fully upright)
  • Product weight: 30.4 pounds
  • Rear-facing capacity: Birth to 50 pounds
  • Forward-facing capacity: 65 pounds or 49"

Shipping Information

Most orders are shipped via FedEx Ground from our warehouse in Scottsdale, Arizona within 1 business day.

In some cases, Strolleria will dropship an order directly from the manufacturer to the customer to shorten the delivery time. In these instances, items typically ship within three business days, but the total delivery time is reduced.

Please see this page for the number of days it takes for products shipped via FedEx Ground from Scottsdale to arrive at your location. FedEx delivers packages on Saturdays and Sundays in most cities, excluding rural areas.

Return Policy

Strolleria accepts returns of new, unused items that are returned to us within 60 days of receipt. 

Because safety is a top priority for us and all new parents, Strolleria only accepts returns of items that have never been used. Items must be returned in the same condition in which you received them, including the original packaging.

All products sold by Strolleria are covered under a manufacturer's warranty. If the product is defective or becomes damaged during the warranty period, the manufacturer will send a repair or replacement part at no cost.

Visit this page for our complete return policy.


Customer Reviews

Based on 13 reviews
Cybex Sirona S for my toddler BUY IT!

Firstly, I do not typically write reviews but after having a baby it has helped me make so many decisions with big purchases.
We were scoping the market for a good convertible car seat after my son outgrew his Nina pipa lite (best infant car seat ever!) My husband and I came across the cybex rotating seat and fell in love with the idea. I wanted to really give it a true test and went to buy buy baby to test it out. I called strolleria while at the store, the customer service agent was so informative and gave me a crash course over the phone. It was so helpful in making the final decision. We have been using the seat for 2 weeks now and we love it and my active toddler loves it! Getting him in and out is so easy with the rotating feature. We took a long road trip and he slept well and looked comfortable with the recline options on the seat and head rest.
I would highly recommend this seat. Thank you strolleria for your exceptional customer service.

Katilyn Phipps
Worth the price.

This wasn’t the original car seat I was looking at and my husband found this one.. I’m glad he did because it has been a great big girl car seat. Being able to move our daughter towards us to put her in and out has been so much easier then a traditional carseat. The material is extremely soft and doesn’t feel cheap in anyway. The safety harness is also great and that it connects to our phones and alerts us about her temperature is super cool. The only thing was the installation it was harder to install then how they’d show it in there video. But overall this carseat is worth it!

Laura Howlett
Moves too much

I read great professional reviews on this car seat, but the sensor screws with my car’s electronics, it moves WAY too much even with the leg extended, and is just difficult to use. I’m ordering a different car seat and I guess this will go in the trash.

Ergys Maja
Cybex sirona s convertible car seat

Not easy to install, very difficult to get tightened down. Tried connecting the sensor multiple times and still not able to not get it to work. Tried with several phones and not sure if my car seat is broken but that’s what lured us into going with this particular car seat. 4 stars due to that issue but as far as safety

Kimberly wilson
Cybex car seat

Love the car seat