--- product_id: 197000321 title: "Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue" brand: "cybex" price: "$1843.53" currency: USD in_stock: true reviews_count: 9 url: https://www.desertcart.us/products/197000321-sirona-s-rotating-convertible-car-seat-with-sensorsafe-2-1 store_origin: US region: United States of America --- # SensorSafe 2.1 smart alerts 360° rotatable seat 25% more side-impact protection Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue **Brand:** cybex **Price:** $1843.53 **Availability:** ✅ In Stock ## Summary > 🔄 Spin, Secure, and Stay Smart — The Last Car Seat You’ll Ever Need! ## Quick Answers - **What is this?** Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue by cybex - **How much does it cost?** $1843.53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/197000321-sirona-s-rotating-convertible-car-seat-with-sensorsafe-2-1) ## Best For - cybex enthusiasts ## Why This Product - Trusted cybex brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Custom Fit Growth:** 12-position adjustable headrest and no-rethread harness grow with your child. - • **Smart Sensor Alerts:** Stay connected with real-time app notifications on your child’s safety and comfort. - • **Next-Level Safety Tech:** Linear Side-impact Protection absorbs 25% more impact for peace of mind. - • **Effortless 360° Rotation:** Seamlessly switch between rear and forward-facing without the backache. - • **Easy & Secure Installation:** EasyLock Bar reduces installation force by 4x with clear angle indicators. ## Overview The Cybex Sirona S is a premium convertible car seat designed for newborns to preschoolers, featuring a unique 360° rotating seat for effortless loading, advanced SensorSafe 2.1 technology for real-time safety alerts, and superior side-impact protection that absorbs 25% more collision force. With a steel-reinforced frame, adjustable headrest with no-rethread harness, and EasyLock installation system, it combines cutting-edge safety with unmatched convenience for busy, safety-conscious parents. ## Description The CYBEX Sirona S is the first convertible car seat in the U.S. to feature an innovative 360° rotatable seat with a load leg, making switching between rear-facing and forward-facing positions quick and easy. This rotatable seat, along with magnetic buckle holders, makes it easy to get your child in and out. Designed for safety, the Sirona S features a steel-reinforced frame and anti-rebound design that reduces car seat rebound movement. Linear side-impact protection system absorbs up to 25% more impact in a collision when compared to the same car seat without L.S.P. extended. A one-time belt installation secures both forward and rear-facing positions. Our EasyLock™ Bar works with your vehicle belt for easy and secure installation, while the dual-level indicators ensure the car seat is at the proper angle. Adjust your Sirona S as your child grows, with a 12-position headrest with no-rethread harness. SensorSafe™ technology in the chest clip syncs automatically with your mobile app and provides alerts of unsafe situations, including if a child unbuckles themselves; if the back seat is too warm or cold, if a child has been seated for too long, or if the driver accidentally leaves the child behind. Review: quality seat, the last one you'll need before boosters. a back saver! - forgot to write a review. This was the car seat we bought after our newborn out grew the infant seat. My child is 3 now, and we still use this daily. Could not recommend more, this seat is a life saver for loading children into a sedan or low SUV. Now that we have a minivan, the swivel isn't needed. But the fact that one carseat can do both rear/front means this will be the last carset you need before you need to graduate to a booster seat. 2-3 years of constant use should speak for the quality and solidity of this. We actually bought a second. The seat is a little heavy, so moving between cars is a challenge. We also had trouble securing the hooks/buckles in certain rentals (nissan altima /chevy impala IIRC). This seems to fit fine in Toyotas, multiple model Siennas, Corollas, and Camrys. The issue is in certain seats, the part where you buckle the seat into the car frame is "higher" on certain models or the seat well is too shallow, and this causes the belt tension release to press against one of the covers. We mitigated this by placing some folded towels under the seat. And we didn't care because the seat fits fine in our primary cars. Review: Great car seat, tricky to install - I really struggled with installing this and had to get professionals to help me. They explained the way the bench in my car worked it wasn't a good fit for having it in the middle, though i'm sure this varies by vehicle. If it's important to you to have your car seat in the middle seat and you don't have an SUV, i'd go with something else. We now have it installed on the side and it's been wonderful. The swivel has been a big relief for my back, and I don't feel I had to make sacrifices safety wise for it like I did with other swivel seats I researched. Our daughter appears very comfortable, the straps move smoothly and hold her firmly in place, and the sensor-safe works extremely well (though I needed the pros to show me where to plug that in too!). Unfortunately kiddo vomited in it ,but we found it very easy to clean! Everything came off the base and went back on easily and washed right out the first try. When the seat swivels, the leg pops up which can be unsettling but once the seat is locked in place (forward or rear facing) it isn't going anywhere. I'm grateful for all of the visual reminders indicating the seat is installed properly because we moved our front seat and it knocked the support leg off kilter. I noticed right away because of the color coding indicators at the top. Very glad we chose this car seat! ## Features - Polyester - Convertible Car Seat: The first car seat in the U.S to feature an innovative 360° rotatable seat, the Sirona S makes it quick and easy to switch between rear-facing and forward-facing positions and get your child in and out of the car. - EasyLock Bar: Reduces the force needed up to 4x for simple and secure car seat installation. Dual-level indicators ensure that your car seat is at the correct recline angle while our load leg can reduce rotation in certain crashes by up to 30%. - SensorSafe: Built into the chest clip, SensorSafe provides app alerts if a child unbuckles themselves; if the back seat has become too warm or too cold, if a child has been seated for too long, or if the driver accidentally leaves the child behind. - Superior Protection: Linear side-impact protection (L.S.P.) absorbs up to 25% more impact in a collision compared to the same car seat without L.S.P. extended while the anti-rebound design reduces car seat rebound movement in the event of a crash. - Adjustable Headrest: Make sure your car seat is always a perfect fit with 12 different headrest positions. The Sirona S harness adjusts without re-threading, making it easier to adjust the height of the shoulder straps as your child grows. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B085S7GWFX | | Age Range Description | Infant,Baby,Toddler | | Best Sellers Rank | #53,064 in Baby ( See Top 100 in Baby ) #95 in Convertible Child Safety Car Seats | | Brand | Cybex | | Color | Indigo Blue | | Customer Reviews | 4.0 out of 5 stars 661 Reviews | | Harness Type | 5-Point | | Installation Type | Seat Belt | | Item Dimensions D x W x H | 25.3"D x 20"W x 25.5"H | | Manufacturer | 519004441 | | Material | Alloy Steel | | Material Type | Alloy Steel | | Maximum Height Recommended | 49 Inches | | Maximum Weight Recommendation | 65 Pounds | | Minimum Height Recommendation | 17 Inches | | Minimum Weight Recommendation | 4 Pounds | | Model Number | 519004441 | | Number of Height Positions | 12 | | Orientation | Rear Facing | | Part Number | 519004441 | | Product Dimensions | 25.3"D x 20"W x 25.5"H | | Rear Facing Minimum Weight | 4 Pounds | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Cybex - **Color:** Indigo Blue - **Installation Type:** Seat Belt - **Material:** Alloy Steel - **Orientation:** Rear Facing ## Images ![Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue - Image 1](https://m.media-amazon.com/images/I/41K1yNE2yPL.jpg) ![Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue - Image 2](https://m.media-amazon.com/images/I/61gvxteTNsL.jpg) ![Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue - Image 3](https://m.media-amazon.com/images/I/61iuyQOby7L.jpg) ![Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue - Image 4](https://m.media-amazon.com/images/I/61tjHITIzML.jpg) ![Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue - Image 5](https://m.media-amazon.com/images/I/51l7sAXiqrL.jpg) ## Questions & Answers **Q: Does it alert you if you forget to take the baby out of the car after the car is turned off?** A: I do not own this carseat but a friend does. I am someone who got alerted that my friends child was left in car, and where car was. Because of covid child was being cared for by relative who normally did not care for the child. Child is fine care of alert. Thank you to whoever came up with this **Q: I installed this with the seatbelt and latch and it’s wobbly. i feel like i can tip it over. what did i do wrong?** A: This seat only allows for install using one method - Seat Belt, or Latch, not both at the same time. I would reccomend installing using seat belt - oncle you click it, pull the extra slack in the seat belt down where the buckle is, and then route the shoulder belt portion the rest of the way before you lock off - most times, the installer leaves too much slack in the lower belt and that is why it moves for any car seat. **Q: Why is this car seat not stable? it wobbles side by side .** A: Most have better luck installing this with the seat belt, over the latch system. The user manual also states, "In some vehicles in the most reclined position, it may be necessary to place a rolled towel or small blanket beneath (not behind) the Child Restraint near the seat back to provide enough recline so that the Recline Ball is in the BLUE ZONE for REAR-FACING use. NOTE: Only items approved by CYBEX are allowed under Base." **Q: Will this fit in a Chevy trailblazer?** A: Some child restraints do not fit all vehicles or all seating positions. There are so many different combinations of vehicle makes, models, child restraint configurations, seat belt designs and seat cushion designs. Dimensions of the seat H 25.5” x W 20” x D 25.3”. ## Customer Reviews ### ⭐⭐⭐⭐⭐ quality seat, the last one you'll need before boosters. a back saver! *by B***N on December 5, 2025* forgot to write a review. This was the car seat we bought after our newborn out grew the infant seat. My child is 3 now, and we still use this daily. Could not recommend more, this seat is a life saver for loading children into a sedan or low SUV. Now that we have a minivan, the swivel isn't needed. But the fact that one carseat can do both rear/front means this will be the last carset you need before you need to graduate to a booster seat. 2-3 years of constant use should speak for the quality and solidity of this. We actually bought a second. The seat is a little heavy, so moving between cars is a challenge. We also had trouble securing the hooks/buckles in certain rentals (nissan altima /chevy impala IIRC). This seems to fit fine in Toyotas, multiple model Siennas, Corollas, and Camrys. The issue is in certain seats, the part where you buckle the seat into the car frame is "higher" on certain models or the seat well is too shallow, and this causes the belt tension release to press against one of the covers. We mitigated this by placing some folded towels under the seat. And we didn't care because the seat fits fine in our primary cars. ### ⭐⭐⭐⭐⭐ Great car seat, tricky to install *by O***R on December 31, 2020* I really struggled with installing this and had to get professionals to help me. They explained the way the bench in my car worked it wasn't a good fit for having it in the middle, though i'm sure this varies by vehicle. If it's important to you to have your car seat in the middle seat and you don't have an SUV, i'd go with something else. We now have it installed on the side and it's been wonderful. The swivel has been a big relief for my back, and I don't feel I had to make sacrifices safety wise for it like I did with other swivel seats I researched. Our daughter appears very comfortable, the straps move smoothly and hold her firmly in place, and the sensor-safe works extremely well (though I needed the pros to show me where to plug that in too!). Unfortunately kiddo vomited in it ,but we found it very easy to clean! Everything came off the base and went back on easily and washed right out the first try. When the seat swivels, the leg pops up which can be unsettling but once the seat is locked in place (forward or rear facing) it isn't going anywhere. I'm grateful for all of the visual reminders indicating the seat is installed properly because we moved our front seat and it knocked the support leg off kilter. I noticed right away because of the color coding indicators at the top. Very glad we chose this car seat! ### ⭐ Design disaster! OMG this seat is impossible to install safely *by M***S on March 6, 2024* Spent hours on this, finally put it side by side with Uppababy Mesa and City Turn to see why it just couldn't be installed securely via seat belt or anchor belt. We loved the secure feeling of this seat - your baby is truly in a protected cocoon, surround by heavy thick materials, with nice fabric and really solid heavy duty belts and buckles. Everything feels great. BUT the seat is let down by its base, which, even when the seat is back in locked position, allows so much slack between the top rotating section and the base that you get a click each time you brake or accelerate. Then, this slack is accompanied by having to push your baby and chair up to vertical in order to rotate the seat, so you're not even gaining rotation at any swivel angle for that slack. Last, and this is the worst part, the design of the base, in order to accommodate that big cocoon for your baby, requires the belt path for both seat belt and anchor belt to travel very close to parallel with the vertical surface of your vehicle seat. This means it's impossible to get enough back/forth pull, or tension in the direction perpendicular to the vehicle seat surface, to secure the seat. The belt path is basically too flat against the surface, unlike the City Turn or Uppababy Mesa, so you can never tighten the belt enough to secure the seat to your car. Or if you do, like I really tried, you start deforming/damaging your car seat belt or the Sirona's anchor belt. What a mess. Maybe they fixed this in new European version, but we seem to only have the Sirona S here in the US for now. Easy fix is to put a spacer of 3 or 4 inches between car seat and your vehicle seat, to add perpendicular belt path, but then for sure the Sirona will bump up against the front vehicle seats in most cars. So close!! The City Turn took 5 min to install tight. The Sirona S never made it. Google it - everyone has problem installing it tightly. Even if the base is set in concrete, there's still so much slack between base and seat, sigh. ## Frequently Bought Together - Cybex Sirona S Rotating Convertible Car Seat with SensorSafe 2.1, Children Newborn to Four Years, Easy Child Load, Infant Baby Toddler Preschooler, Indigo Blue - CYBEX Solution B2 fix+ Lux High Back Booster Seat, Lightweight Booster Seat, Secure Latch Installation, Linear Side Impact Protection, Reclining 12-Position Height Adjustable Headrest, Bay Blue --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/197000321-sirona-s-rotating-convertible-car-seat-with-sensorsafe-2-1](https://www.desertcart.us/products/197000321-sirona-s-rotating-convertible-car-seat-with-sensorsafe-2-1) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-06-09*