Sirona G i-Size
Sirona G i-Size
CYBEX Gold
Sirona G i-Size
The ADAC and Stiftung Warentest awarded Sirona G i-Size has 360° rotation making on-boarding ever so simple. Integrated Linear Side-Impact Protection and all-round ventilation keep your child safer and cooler. Only compatible with the Base G.
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- Age 3 mths - approx. 4 yrs
- Weight max. 19 kg
- Regulation UN R129/03
- 61 - 105 cm
- 76 - 105 cm
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Awarded
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New Colors
CYBEX Gold
Sirona G i-Size
The ADAC and Stiftung Warentest awarded Sirona G i-Size has 360° rotation making on-boarding ever so simple. Integrated Linear Side-Impact Protection and all-round ventilation keep your child safer and cooler. Only compatible with the Base G.
Read more
- Age 3 mths - approx. 4 yrs
- Weight max. 19 kg
- Regulation UN R129/03
- 61 - 105 cm
- 76 - 105 cm
No longer available
No longer available
4 Awards
Product Details
Specifications:
- Age range: From approx. 3 months up to 4 years (from birth with newborn inlay)
- Child height: 61 - 105 cm (from 40 cm with newborn inlay)
- Child weight: Max. 19 kg
- Approval regulation: UN R129/03
360° Comfort & Safety
Say hello to rear-facing travel with the ADAC awarded CYBEX Sirona G i-Size car seat, with up to 50% higher safety levels¹ for your child. Innovative 360° rotation makes on and off-boarding so much simpler for parents as the child is placed in a much more manageable position. Once on-board they'll be cool and comfortable whatever the weather, with an all-round ventilation system with special mesh fabric increasing breathability by a factor of six². A cleverly integrated Linear Side-Impact Protection System gives streamlined, reinforced protection in the event of a side collision. As part of the Modular G family, the base you had for the Cloud G i-Size fits perfectly to this seat: continuous safety for the first four years.
Care instructions:
- Fabric covers machine washable at 30° C
Compatible with:
- Base G
- Car Seat Cup Holder
- Sirona G Line Newborn Inlay
- Sirona G Line Summer Cover
- SensorSafe 4-in-1 Kit Toddler
- ISOFIX Guides
References
¹ Compared to the same seat forward-facing in a frontal crash. Result of internal testing using 2022 ADAC frontal crash test criteria.
² Compared to conventional car seat covers.
Product Code
524001423 (Magic Black)
Up to 50% higher safety levels
Rear-facing travel is obligatory until your child is 15 months old. The Sirona G i-Size provides up to 50% higher safety levels in its rear-facing position¹. In the event of a front impact, the child's body is pushed against the padded car seat shell, minimizing movement and reducing the forces on the neck. A safe position you can count on until your child is 4 years old.
Easy on and off-boarding
An innovative 360° rotation mechanism makes it so easy to get your child in just the right position to get them in or out of the car, even when the seat is reclined. Swivel the seat with one hand: much quicker and so much better for your back.
One base – two seats: ​Designed to cover their first 4 years
As part of the Modular G Family, the Cloud G i-Size and Sirona G i-Size both fit onto the Base G. Once your child has outgrown the infant car seat, the Sirona G i-Size installs on the base with just one click. Thanks to ISOFIX installation, it's a user-friendly, safe foundation for the first four years (Base G available separately).
Check your Car Compatibility
To confirm whether this car seat is suitable for installation in your vehicle, please use our Car Compatibility Checker.
Base G
Required
The Sirona G i-Size clicks on and off the Base G. This is installed using a load leg and ISOFIX. The Base G ensures safety and stability, and it can also be used with the Cloud G i-Size infant car seat. Look for the i-Size logo in your vehicle to check compatibility. If there is no i-Size logo but your car has ISOFIX, please check our Car Compatibility tool.
Measurements
- Length
- 710 mm
- Width
- 440 mm
- Height
- 750 mm
- Weight without Base G
- 6.5 kg
What's included?
- Sirona G i-Size toddler car seat
- User guide (Quick-start guide & digital guide access)
Find all available downloads for this product in the Download Center.
Will the car seat fit in my vehicle?
It is important to check whether the car seat is compatible with your vehicle before you purchase it. The car seat is approved for use in i-Size compatible vehicle seating positions as indicated by vehicle manufacturers in their vehicle User Guides. If your vehicle does not have an i-Size seating position, please check the Car Compatibility Checker on the CYBEX Website.
Can I use this car seat on a flight?
No, this car seat is not approved for use on an airplane.
Is it ok to keep using a car seat after an accident?
We at CYBEX strongly recommend that you replace a car seat after any kind of accident. This is because tiny hairline cracks, which may not be visible to the naked eye, can appear in the plastic parts of a car seat after an accident. These cracks can pose an increased risk to safety.
My car seat is faulty, how can I get it repaired?
Please refer to the retailer where you bought your CYBEX car seat. They will deal with the matter on your behalf.
Where can I get replacement parts for my product?
You can order replacement parts from a specialist retailer near you. To find a store near you, simply go to the Store Locator on the CYBEX Website.
When should I remove the newborn inlay?
The newborn inlay has to be removed when your infant reaches a height of 61 cm (corresponding to approximately 3 months). This ensures that your growing baby has enough space in the car seat.
How do I correctly secure my child in the seat?
Please observe the instructions in the User Guide. Adjust the child car seat to the size of your child and make sure that he or she is properly strapped in to ensure maximum safety.
My child keeps trying to wriggle out of the harness system. What can I do about this?
As with any other restraint system, a car seat can only fully protect your child if he or she is secured correctly and does not actively try to leave the car seat. Please explain to your child the importance of staying in the car seat before you travel. Common issues include the opening of belt buckles or the pulling down of shoulder belts on car seats secured by a harness. Make sure that the belts are fitting nice and snug, you should also consider what clothes your child is wearing while sat in the car seat, as thick clothing reduces the protection offered by the belt. You can keep your child safer by purchasing the SensorSafe chest clip accessory. It helps prevent the child from slipping out of the harness and if your child manages to open the clip, you will be instantly alerted via push notification on your smartphone. Please refer to the User Guide for further instructions and information.
When am I allowed to use the Sirona's forward-facing position?
Once the child exceeds 15 months of age and has reached a minimum size of 76 cm you are allowed to use the forward-facing position of your Sirona car seat. This is not a must. We rather recommend transporting children in the Sirona's rear-facing position for as long as possible. The car seat allows rear-facing travel up to a height of 105 cm (approx. 4 years).
Can I wash the newborn inlay and cover of the car seat in the washing machine?
Yes, both are washable. Note however, that the foam in the newborn inlay needs to be removed before washing. It can be pulled out via slots in the fabric. You can put the foam back through the slots after the newborn inlay is washed and dried. We recommend using a delicate wash cycle and a maximum temperature of 30 degrees Celsius. Detailed instructions can be also found in the User Guide.
How can I clean my car seat?
Car seats can be cleaned using a vacuum cleaner or damp cloth. Sand or other dirt beneath the cover can also be removed in this way. To clean the plastic parts of the car seat wipe them with a cloth using a mild detergent and warm water. (Warning: Please do not use chemical detergents or bleaching agents under any circumstances.) Please note that a car seat should never be dismantled for cleaning. Please always refer to your car seat’s User Guide when carrying out care and maintenance on your car seat. Generally the seat covers are machine washable at a maximum temperature of 30˚C on a delicate cycle. If you wash them at a higher temperature, the cover fabric might lose its color or shrink. Please wash the cover separately and never dry it by machine or in direct sunlight. (Warning: Only the cover of the car seat can be machine washed. The car seat itself is not machine washable.) Should you wish to clean a car seat more thoroughly than recommended above, you will have to have it cleaned professionally. Please ask the retailer who sold you the car seat to refer you to a professional service.
How do I know when my child needs to change to the next car seat?
We generally advise against prematurely switching from an infant car seat (40-87 cm, max. 13 kg, from birth up to approx. 24 months) to the next seat. Even if your child’s feet protrude outside the infant car seat, or if your baby can already sit up, your child has not necessarily grown out of the seat. However, if your child's head is protruding above the top edge of the seat and your child already weighs over 13 kg, it is time to change the seat as it will no longer provide sufficient protection to the child’s vulnerable neck and head area.
Can I install a rear-facing seat on the front passenger seat?
Rear-facing car seats must only be installed on the passenger seat if the front airbag has been deactivated. Placing your child on a passenger seat with an activated airbag poses an enormous risk of injury, and we at CYBEX strictly advise against this. For other types of car seats check the user manuals of both your car seat and your vehicle to find out if you should deactivate the airbag. Statistics show that the safest place for a car seat is on the rear seat behind the front passenger seat. Side airbags do not put your child’s safety at risk. If you have no choice other than to use the front passenger seat, please ensure that the seat is pushed back as far as possible and that the airbag is deactivated.
Can I use the car seat on laterally-facing vehicle seats?
It is not permitted to use the car seat on laterally-facing vehicle seats.
Can I use the car seat on rear-facing vehicle benches (e.g. in vans or minibuses)?
No. This car seat cannot be used on rear-facing vehicle benches.
What do I have to bear in mind when installing the Sirona in my vehicle?
First, select an appropriate vehicle seat. Unfold the load leg until it locks with an audible CLICK. Release the buttons of the ISOFIX locking arms and push them out of the base to their furthest extent. Insert the arms into the ISOFIX anchorage points (make sure they lock with an audible CLICK and that the safety indicators show green). Push the base towards the backrest of the vehicle seat until it is fully aligned with the backrest. Moving the whole car seat back and forth, and from side to side will further brace it against the backrest. Always make sure that the load leg is extended completely (pull out the load leg by pushing the adjustment button until it touches the vehicle floor). Pull the leg out and into the next locking position (make sure the load leg indicator on the base shows green).
Can I also use this seat in a car without ISOFIX anchorage points?
No, this seat can only be installed in vehicles with ISOFIX anchorage points, due to the fact that it must be installed with ISOFIX in every position.
What should I bear in mind when installing the car seat in my vehicle?
Before purchasing the car seat, it is important to check if it is approved to be used in your vehicle. If your vehicle has an i-Size seating position compatibility is given. If you have no i-Size seating position, please scan the dedicated QR-Code on your "Quick Start Guide" or use the specific weblink provided on the Packaging Box, to access the Car Compatibility Tool of your product. For proper protection of your child, it is essential to use and install the car seat according to the instructions given in the User Guide. It can be downloaded via the CYBEX Website.
Where should I install a car seat in my car?
Although it may be possible to install a CYBEX car seat on other seats in the vehicle, the safest place for a car seat is in the rear seat, behind the front passenger seat. We advise you to refer to the Car Compatibility Tool on the CYBEX Website. You can scan the dedicated QR-Code on your Quick Start Guide or use the specific weblink, provided on the Packaging Box, to access the Car Compatibility Tool for your product.
How should the headrest be adjusted?
Only a headrest adjusted to the optimum height will give your child the best possible protection and comfort. The height can be adjusted to various positions. The headrest must be adjusted so there are no more than 4 cm between the child’s shoulders and the bottom of the headrest.
Can I use the car seat even when the side airbag is activated?
Yes, the side airbag can remain activated when using the car seat.
Are both side-impact protectors (L.S.P.s) needed?
The Linear Side-impact Protection (L.S.P.) reduces the forces of a side-impact collision and thus also the risk of injury. Generally, we advise parents to install or fold out the L.S.P. on both sides of the car seat. However, if there is insufficient space for the L.S.P. nearest the middle of the vehicle, it is not absolutely essential. For safety reasons, please ensure that the L.S.P. nearest the door is always installed or folded out.
Is my child allowed to rest his/her legs on the rebound bar?
Relatively tall infants may rest their legs on the rebound bar. Bending the legs at the knee does not affect safety in any way. As long as the child has sufficient legroom you can use the seat in a rear-facing position.
The car seat is approved in compliance with the i-Size standard (UN R129). What does this mean?
i-Size is a European standard for car seats. Among other regulations i-Size states that infants must travel in a rear-facing position before the child's age exceeds 15 months and that, for the first time, side-impact protection is tested. To find out more about i-Size, check our Safety page on the CYBEX Website.
When does a car seat expire?
As soon as a car seat is installed in a vehicle, it may be exposed to high temperatures and high levels of light intensity. As a result, even high-quality and extremely age-resistant plastics such as those used by CYBEX can display certain age-related alterations. To ensure the safety of your child, we strongly recommend that the seats are not used for longer than the prescribed usage periods. A car seat will be designed to keep your child safe for a specific period in their development, for example from birth to approximately 4 years old for a Sirona Series seat. Sometimes they can be used for longer, for example our products for babies and toddlers can also be used for a sibling. To find out the approximate lifespan of your CYBEX car seat, refer to the User Guide or contact our Customer Service.
What kind of clothing should my child wear when seated in the car seat?
Thick clothing prevents the harness/vehicle belt or impact shield from lying tight against the body of the child. Only a correctly adjusted restraint system can offer maximum protection. For this reason, your child should wear everyday clothing. Thick clothing such as winter jackets and clothing with hoods (e.g. hoodies) as well as hats should be avoided where possible. Once your child has been positioned in the car seat, he/she can be covered with an extra blanket for warmth.
When is a child too big for the Sirona?
The Sirona can be used by infants up to 105 cm in height or up to a maximum bodyweight of 19 kg (approx. 4 years).
What is the maximum diameter of a bottle to still fit in the cup holder?
The diameter of a bottle should not be larger than 7 cm.
How do I install the cup holder?
On either side of the car seat there are little openings in the fabric of the seat cover indicated by stitching. Pull the fabric of the seat cover slightly open at this point and insert the cup holder into the opening. To remove it, pull the cup holder upwards.
Warranty Claims
If you need to claim your warranty, please contact the original retailer where you purchased your CYBEX product.
If you purchased your product directly from the CYBEX Online Shop, please use our Contact Form to get in touch with us.
Spare Parts (outside Warranty)
If you are looking for spare parts and your product is no longer under warranty, please contact any authorized CYBEX retailer in your area. You can find one using our Store Locator.
Not sure if you're still under warranty? In that case, feel free to contact us – we're happy to help.
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