CYBEX OPEN BOX Sirona S Rotating Convertible Car Seat with Load Leg and SensorSafe - Indigo Blue | live price, prepared checkout

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Checked facts

Each fact below was checked against the source it cites before it was published. Each carries that source's link and the time RoboTrunk read it. 82 checked facts, checked 2026-10-09T19:38:36.337Z. Research depth: trimmed read. Deep read: the store's own data and 17 outside pages (the store's own product page; maker page; manual; review; blog; regulator recall search (CPSC (United States)); regulator recall search (Health Canada); official safety test results (CREP, the Child Restraint Evaluation Program); official safety test results (NHTSA's Car Seat Ease of Use Ratings); video review (derived summary of its captions)), each read in full by RoboTrunk and trimmed to its main content, then written up and checked. Facts from the maker or a manual quote the page word for word; what real users report is summarised with a link to the page read. Recall status was checked directly with CPSC (United States), Health Canada: A CPSC recall search for Cybex-dc / Sirona S with SensorSafe returned no recall records, and Health Canada’s recall open data mentions no Cybex-dc records. The manual tells owners to register the seat so they can be reached if it is ever recalled. Official safety test results were looked up directly with CREP, the Child Restraint Evaluation Program, NHTSA's Car Seat Ease of Use Ratings: CREP, the Child Restraint Evaluation Program (Australia and New Zealand): CREP’s published list of 216 rated seats is stated to be every seat it has rated; it contains Cybex models but no Sirona S, so this seat has not been rated by CREP. NHTSA's Car Seat Ease of Use Ratings (United States): NHTSA has rated the Cybex Sirona S, but under model numbers 519004437 (the Premium Black variant) and 5190044327, not this Indigo Blue open-box code 519004441. The tested rear-facing mode scored 5 of 5 stars overall and the forward-facing mode 4 of 5 stars; these are ease-of-use ratings, not crash-test results. Not read, because they are member-only or refused RoboTrunk: Consumer Reports car seat ratings, Which? child car seat tests, JPMA certified products.

• side impact claim: The maker claims the Linear Side-impact Protection reduces collision forces in a side impact by up to 25% and the load leg reduces frontal crash forces by up to 30%, compared with the same seat without those features.. Source: https://dd1dfe-a3.myshopify.com/products.json (listing), read 2026-10-09T19:03:04.916Z.
• specification table: Their table lists the seat at 30.4 lbs, height limit 49 in, dimensions 30″L x 19″W x 24″H, two cup holders, portability 7/10 as bulky and heavy duty, a 10-year lifespan and no airplane use.. Source: https://carseaton.com/cybex-sirona-s-review/ (review), read 2026-10-09T19:14:53.553Z.
• loading routine: Describes the rotation as letting a parent stand upright outside the car, buckle the child while facing them, then swivel the seat back with one hand, taking about 15 seconds.. Source: https://teachtoddler.com/blog/cybex-car-seat-review (blog, TeachToddler, published 2026-04-11), read 2026-10-09T19:15:01.321Z.
• safety test: NHTSA’s Car Seat Ease of Use Ratings cover the Cybex Sirona S but under other model codes, 519004437 and 5190044327, not this Indigo Blue open-box code 519004441, so the tested seat is a different variant of the same model. The rating measures ease of use, not crash performance: the rear-facing mode of the seat made 2021-05-01 (model 519004437) scored 5 of 5 stars overall and the forward-facing mode 4 of 5 stars; the rating was read from NHTSA’s ratings data at https://api.nhtsa.gov/childSeats?dataSet=ratings.. Source: https://api.nhtsa.gov/childSeats?dataSet=ratings (guide), read 2026-10-09T19:15:06.480Z.
• rotation space: The presenter shows the seat needs a lot of room to rotate; in their tall driving position only about an inch of clearance was left, so they suggest taller drivers put the seat on the passenger side.. Source: https://www.youtube.com/watch?v=AR_fx8mDd6c (review), read 2026-10-09T19:16:47.295Z.
• rotating and locking: The seat swivels 360 degrees towards the door and locks automatically once weight is added, with an indicator confirming it is locked; slide it to the most upright position before rotating.. Source: https://www.youtube.com/watch?v=pN9TMqJL17g (review), read 2026-10-09T19:16:47.433Z.
• dimensions: The seat measures 24.5 inches long, 19 inches wide and 25.5 inches high.. Source: https://dd1dfe-a3.myshopify.com/products/cybex-open-box-sirona-s-rotating-convertible-car-seat-with-load-leg-and-sensorsafe-indigo-blue (guide), read 2026-10-09T19:13:15.309Z.
• specifications: The maker classes it as a convertible car seat for children from 4 lbs up to 65 lbs, up to 49 in tall, from newborn to about 4 years old.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• safety certification: The restraint meets Federal Motor Vehicle Safety Standard 213 and is certified for use in passenger cars, multi-purpose passenger vehicles, buses and trucks with lap/shoulder belts.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• size in the car: Measured 21 inches wide at the child’s shoulder with one L.S.P. pod extended, and just over 29 inches front-to-back when fully reclined.. Source: https://csftl.org/cybex-sirona-s-convertible-car-seat-review/ (review), read 2026-10-09T19:14:03.361Z.
• crash performance: In that lab’s crash-test analysis the seat scored below average against the competition, though it meets federal standards; head sensor readings were better than most but the chest clip reading was not.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• leave-behind alert: An alert fires once the phone is about 25 feet from the car, then a two-minute countdown runs before designated emergency contacts are sent the location of the child and seat.. Source: https://www.wired.com/review/cybex-sensorsafe-sirona-s-car-seat-review/ (review), read 2026-10-09T19:14:10.773Z.
• installation experience: Installation went smoothly but the manual is dense to read, so the tester switched to the maker’s online video tutorials.. Source: https://www.pnmag.com/gear/gear-reviews/cybex-sirona-s-convertible-car-seat-review/ (blog, Pregnancy & Newborn Magazine, published 2022-03-23), read 2026-10-09T19:14:22.320Z.
• overall rating: Scored 53 overall and ranked 16th of 17 convertible car seats in that lab’s tests.. Source: https://www.consumerreports.org/babies-kids/car-seats/cybex-sirona-s/m403653/ (review), read 2026-10-09T19:14:37.157Z.
• comparison: They call the Sirona S the most innovative rotating seat with extra safety features, but still pick the Evenflo Revolve360 as their top rotating seat, and note the Sirona S has 12 headrest positions and 12 reclines.. Source: https://carseaton.com/cybex-sirona-s-review/ (review), read 2026-10-09T19:14:53.553Z.
• claimed testing: States that Cybex seats are tested to both US (FMVSS 213) and European (ECE R44/R129) standards and undergo ADAC testing.. Source: https://teachtoddler.com/blog/cybex-car-seat-review (blog, TeachToddler, published 2026-04-11), read 2026-10-09T19:15:01.321Z.
• rotating mechanism: The seat must be pushed fully upright to unlock before it will rotate, and with a heavier child in it, it will not turn otherwise.. Source: https://www.youtube.com/watch?v=AR_fx8mDd6c (review), read 2026-10-09T19:16:47.295Z.
• load leg and base: The load leg can be used in rear- and forward-facing modes, and the base also acts as an anti-rebound panel.. Source: https://www.youtube.com/watch?v=pN9TMqJL17g (review), read 2026-10-09T19:16:47.433Z.
• weight: The seat itself weighs 30.4 lbs.. Source: https://dd1dfe-a3.myshopify.com/products/cybex-open-box-sirona-s-rotating-convertible-car-seat-with-load-leg-and-sensorsafe-indigo-blue (guide), read 2026-10-09T19:13:15.309Z.
• child weight limits: The maker gives 4-50 lbs rear-facing and 22-65 lbs forward-facing; the store’s listing instead says rear-facing 5-40 lbs.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• aircraft: The manual states the seat is not certified for aircraft use.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• harness fit: Harness height runs from 7 inches with the infant insert (8 inches without) up to 16.5 inches, with three crotch positions at 5, 6 and 7 inches.. Source: https://csftl.org/cybex-sirona-s-convertible-car-seat-review/ (review), read 2026-10-09T19:14:03.361Z.
• installation: LATCH installation was among the easiest they tested, while belt installation was harder, with a cramped belt path and a two-step lock-off that has a learning curve.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• temperature alert: The seat chimed when the temperature was above 95°F (35°C) or below 35°F (2°C), including on a chilly morning.. Source: https://www.wired.com/review/cybex-sensorsafe-sirona-s-car-seat-review/ (review), read 2026-10-09T19:14:10.773Z.
• LATCH vs belt: A LATCH install felt insufficiently tight in their vehicle, while a vehicle seat belt install gave a more secure fit.. Source: https://www.pnmag.com/gear/gear-reviews/cybex-sirona-s-convertible-car-seat-review/ (blog, Pregnancy & Newborn Magazine, published 2022-03-23), read 2026-10-09T19:14:22.320Z.
• sub-ratings: Ease of use 3/5, forward-facing fit-to-vehicle 3/5, rear-facing fit 3/5, rear LATCH 2/5, rear belt 3/5, forward LATCH 2/5, forward belt 3/5, with harnessed crash protection rated Better.. Source: https://www.consumerreports.org/babies-kids/car-seats/cybex-sirona-s/m403653/ (review), read 2026-10-09T19:14:37.157Z.
• load leg storage: The load leg has no stowage, sticks out when folded, and stops the seat lying flat for storage; the extra safety features make the seat harder to load, remove and store.. Source: https://www.youtube.com/watch?v=AR_fx8mDd6c (review), read 2026-10-09T19:16:47.295Z.
• one-time install: The seat can be installed once in either mode using the vehicle belt, with the belt path cover removed after rotating the seat to reach the lock-off.. Source: https://www.youtube.com/watch?v=pN9TMqJL17g (review), read 2026-10-09T19:16:47.433Z.
• open box condition: Open-box units are described as brand-new items that were returned or had their box opened, inspected to be complete, safe and usable, and may show small cosmetic imperfections.. Source: https://dd1dfe-a3.myshopify.com/products/cybex-open-box-sirona-s-rotating-convertible-car-seat-with-load-leg-and-sensorsafe-indigo-blue (guide), read 2026-10-09T19:13:15.309Z.
• child height limits: The maker says the seat is for children between 17 and 49 inches tall, and that for rear-facing the top of the head must be at least 1 inch below the top of the restraint.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• rear-facing limits: Rear-facing use is for children 4-50 lbs and 17-49 in tall, with harness straps at or just below the shoulders.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• driving position: The seat must be locked into rear- or forward-facing mode while the car is moving; the rotated position is for loading only.. Source: https://csftl.org/cybex-sirona-s-convertible-car-seat-review/ (review), read 2026-10-09T19:14:03.361Z.
• lock-off: The lock-off release button is fiddly to press and easier to release after unbuckling the belt to relieve tension; they found slight wobble when tugging hard on the side of the installed seat.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• rotation: The 360-degree rotation did not work with one hand for this tester, who needed both hands to release and lock it, though they still loved the feature.. Source: https://www.wired.com/review/cybex-sensorsafe-sirona-s-car-seat-review/ (review), read 2026-10-09T19:14:10.773Z.
• level and labelling: The bubble level indicator helped find the correct recline; instructions are in English on one side of the seat and Spanish on the other.. Source: https://www.pnmag.com/gear/gear-reviews/cybex-sirona-s-convertible-car-seat-review/ (blog, Pregnancy & Newborn Magazine, published 2022-03-23), read 2026-10-09T19:14:22.320Z.
• pros: Listed pros are push-on LATCH connectors, a no-rethread harness, no need to uninstall to switch from rear- to forward-facing, and a swivel that eases loading and harnessing.. Source: https://www.consumerreports.org/babies-kids/car-seats/cybex-sirona-s/m403653/ (review), read 2026-10-09T19:14:37.157Z.
• materials: The presenter calls the materials and cushioning premium and soft, with a cover that is easy to clean and remove.. Source: https://www.youtube.com/watch?v=AR_fx8mDd6c (review), read 2026-10-09T19:16:47.295Z.
• growing with the child: It covers birth to 50 lbs rear-facing and up to 65 lbs forward-facing, with the infant insert removable and the headrest raising without rethreading the harness.. Source: https://www.youtube.com/watch?v=pN9TMqJL17g (review), read 2026-10-09T19:16:47.433Z.
• warranty and returns: Open-box purchases carry a 1-year manufacturer’s warranty and are final sale, not eligible for return or exchange.. Source: https://dd1dfe-a3.myshopify.com/products/cybex-open-box-sirona-s-rotating-convertible-car-seat-with-load-leg-and-sensorsafe-indigo-blue (guide), read 2026-10-09T19:13:15.309Z.
• colour and product code: The Indigo Blue version carries the product code 519004441.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• airbag warning: The seat must never be used in the front seat of a vehicle that has an air bag.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• installation quirk: Their seat kept slipping out of the upright installation position and banging onto the tester’s hand; newer builds lock into that position but can still be finicky to keep locked.. Source: https://csftl.org/cybex-sirona-s-convertible-car-seat-review/ (review), read 2026-10-09T19:14:03.361Z.
• level indicator: The recline indicator is a ball in a channel that works well but would be easier to read with darker or thicker lines.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• space: The seat is large, and the tester warns that compact-car owners may not have room to use the rotation.. Source: https://www.pnmag.com/gear/gear-reviews/cybex-sirona-s-convertible-car-seat-review/ (blog, Pregnancy & Newborn Magazine, published 2022-03-23), read 2026-10-09T19:14:22.320Z.
• cons: Listed cons are a heavy, bulky seat, LATCH limited to 30 lbs rear-facing, a SensorSafe chest clip that can be difficult to open, a non-intuitive EasyLock tensioning device and too many moving pieces in the belt path.. Source: https://www.consumerreports.org/babies-kids/car-seats/cybex-sirona-s/m403653/ (review), read 2026-10-09T19:14:37.157Z.
• size: Of the seats compared, this one is the largest and takes up the most space.. Source: https://www.youtube.com/watch?v=AR_fx8mDd6c (review), read 2026-10-09T19:16:47.295Z.
• what is included in open box: Open-box items are said to include everything a new product would, checked piece by piece, shipped in the original packaging.. Source: https://dd1dfe-a3.myshopify.com/products/cybex-open-box-sirona-s-rotating-convertible-car-seat-with-load-leg-and-sensorsafe-indigo-blue (guide), read 2026-10-09T19:13:15.309Z.
• what is included: The box contains the Sirona S toddler car seat, SensorSafe, one cup holder and the user guide.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• side airbag: For model year 2002 and newer vehicles the vehicle owner’s manual must be checked before using the seat in a position with a side air bag, and nothing may be placed between the restraint and the air bag.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• tether: Cybex says the top tether is optional forward-facing when the load leg is used, but this review still encourages using it; the Canadian version requires the tether, which stops the seat swivelling.. Source: https://csftl.org/cybex-sirona-s-convertible-car-seat-review/ (review), read 2026-10-09T19:14:03.361Z.
• buckle and harness: The buckle is larger and easier than average, the prongs push in easily but release takes more pressure, and the magnetic prong holders sit high with small prongs that need effort to line up; tightening and loosening the harness was easier than average.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• booster limitation: They wished the seat grew into a booster seat, saying it would be better value as an investment.. Source: https://www.pnmag.com/gear/gear-reviews/cybex-sirona-s-convertible-car-seat-review/ (blog, Pregnancy & Newborn Magazine, published 2022-03-23), read 2026-10-09T19:14:22.320Z.
• installation difficulty: Their take is that it is challenging to manage the straps, tensioning arms and seat while securing it, that the seat can easily be released into the belt path during installation, and that tension must balance between secure and allowing the tensioner door to close.. Source: https://www.consumerreports.org/babies-kids/car-seats/cybex-sirona-s/m403653/ (review), read 2026-10-09T19:14:37.157Z.
• steel frame: The frame is steel reinforced for strength and durability.. Source: https://dd1dfe-a3.myshopify.com/products/cybex-open-box-sirona-s-rotating-convertible-car-seat-with-load-leg-and-sensorsafe-indigo-blue (guide), read 2026-10-09T19:13:15.309Z.
• care: The fabrics are machine washable on a cold delicate cycle with mild detergent.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• crash replacement: The manual tells owners to replace the restraint after a crash of any kind, even if it was unoccupied.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• SensorSafe version: Newer versions use SensorSafe 3.0, which links by Bluetooth to a phone app instead of plugging a receiver into the car’s OBD port.. Source: https://csftl.org/cybex-sirona-s-convertible-car-seat-review/ (review), read 2026-10-09T19:14:03.361Z.
• adjustments: The no-rethread harness has 12 height positions and three crotch positions, moves smoothly, and the buckle strap is easy to move from the front of the seat.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• once installed: Once installed, the swivel feature and harness adjustments work well; the load leg gives some crash benefit but does not put the seat at the top of its class.. Source: https://www.consumerreports.org/babies-kids/car-seats/cybex-sirona-s/m403653/ (review), read 2026-10-09T19:14:37.157Z.
• recline: There are 12 recline positions that can be adjusted while the seat is in use.. Source: https://dd1dfe-a3.myshopify.com/products/cybex-open-box-sirona-s-rotating-convertible-car-seat-with-load-leg-and-sensorsafe-indigo-blue (guide), read 2026-10-09T19:13:15.309Z.
• expiration: The seat is certified for 10 years from its date of manufacture, shown on a sticker on the bottom.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• magnet warning: The seat contains magnets, which are a swallowing hazard if they come loose, and users with pacemakers should ask a doctor about compatibility.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• alerts in use: Testing showed a chime when the car was switched off, then a phone notification with the car’s location offering to alert a backup caregiver or emergency services; the temperature alert complained about cold even when the car was not very cold, and backup contacts need the app.. Source: https://csftl.org/cybex-sirona-s-convertible-car-seat-review/ (review), read 2026-10-09T19:14:03.361Z.
• cover: The cover is quick and easy to remove, threading into small slots and following the outside edge.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• lower anchor weight limits: Lower anchors (LATCH) may only be used up to 30 lbs rear-facing and 35 lbs forward-facing; above that the vehicle seat belt must be used.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• hot surfaces: Buckles and other parts should be checked for hot surfaces before a child is placed in the seat, and an unoccupied seat should be covered in sunlight.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• fabric: The fabric felt rougher than average and had a distinct chemical smell that they suggest airing out as long as possible before use.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• installation: The seat is installed once with the vehicle belt and then swivels between rear-facing and forward-facing without reinstalling.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• recall registration: Owners are told to register the restraint so they can be reached if it is recalled.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• padding: Padding is dense and memory-foam-like with good support all over; the infant insert has good head padding but a lumpy look and a one-inch gap in its back panel.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• load leg: The load leg is height adjustable to suit the vehicle and can reduce rotation in certain crashes by up to 30%.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• load leg modes: The load leg can be used in both rear-facing and forward-facing modes.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• LATCH storage: Push-style LATCH connectors sit on the side, easy to reach with a red pull tab, but there is nowhere to store the surplus strap webbing; the load leg was slightly harder to install than expected.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• L.S.P. use: Only the side-impact protector facing the vehicle door is deployed; it must not be deployed towards the centre of the car, and must not be used for a middle-seat installation.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• side impact construction: The side-impact system combines an adjustable headrest, deep side wings lined with energy-absorbing EPP foam and an adjustable side-impact device.. Source: https://www.cybex-online.com/on/demandware.static/-/Sites-cybex-master-catalog/default/dw4161ce8c/pdfs/manuals/CS_GO_Sirona_S_SensorSafe_3_0_US/cy_171_6048_c1219_sirona_s_us_ug_en_es-5e7a33c94960b.pdf (manual), read 2026-10-09T19:13:46.202Z.
• SensorSafe alerts: The chest clip sends four alert types (car too hot or cold, clip unbuckled, clip buckled over two hours, phone moved away from a buckled clip) and can alert a backup contact after three minutes; they worry parents may silence repeated notifications.. Source: https://www.babygearlab.com/reviews/vehicle-safety/convertible-car-seat/cybex-sirona-s (review), read 2026-10-09T19:14:06.625Z.
• middle seat installation: Lower anchors may be used in a centre seat if the vehicle’s lower anchor bars are 11-20 inches apart and the vehicle maker allows it.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• top tether: Cybex says the top tether is not required forward-facing when the load leg is used, and the seat meets U.S. federal safety standards with and without the tether and the load leg.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• after a crash: The seat must be replaced after any crash, even an unoccupied one.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• clothing warning: Children should wear everyday clothing; thick clothing such as puffy jackets must not be worn in the seat because it prevents a snug harness.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• vehicle fit: The maker says it has been fit tested in a variety of vehicles but advises trying the seat rear- and forward-facing in your own vehicle, in different seating positions, before buying.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.
• cup holder: One cup holder is included; a second may be available as an accessory.. Source: https://www.cybex-online.com/en/us/p/10067085.html (guide), read 2026-10-09T19:13:17.538Z.

The full evidence pack, with every citation, source and gap.

Questions we researched but could not confirm

Every fact above is cited. To find them we read the store listing, the maker's page, the manual, owner reviews, blogs, video reviews, the recall records of CPSC (United States) and Health Canada and the safety test results of CREP, the Child Restraint Evaluation Program and NHTSA's Car Seat Ease of Use Ratings and searched for regulator recall notices and owner forums. We also chased the questions below across those sources and found no reliable answer, so you know exactly where the evidence ends and never have to guess.

• What tools, if any, are needed to install the Sirona S?
• How long does the SensorSafe chest clip battery last and can it be replaced?
• Which specific vehicles has the Sirona S been fit tested in?
• Does this Indigo Blue version really have flame-retardant-free fabric?
• Can the harness straps and buckle be washed, and how?
• Does the swivel mechanism need any maintenance or lubrication over time?
• How much side clearance is needed next to the seat to rotate it?
• Does the fabric or its coating fade or rub off with use?
• Where is the date of manufacture on an open-box unit?
• Does the open-box seat come with the registration card for recall notices?
• Does the cup holder fit larger bottles and sippy cups?
• Is the chest clip compatible with older phones and Bluetooth versions?

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