Sirona Zi i-Size
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Parents who want maximum safety for their child need products that meet their expectations in every way. With the CYBEX Sirona Zi i-Size we have set new standards for side- and front-impact protection, producing a car seat that we’re confident outshines all that came before it.
- 360° rotating mechanism
- Rear-facing car seat
- Integrated Linear Side-impact Protection
Capable of being rotated 360°, it’s easy to get your child on-board and simple to switch the car seat between rear-facing and forward-facing positions. Superior comfort is achieved with the seat’s 12-step adjustable headrest and 5 recline settings for finding the perfect position for sleep. For the smallest passengers, a newborn inlay with added head and side padding allows them to travel in an ergonomically optimized position.
- I-Size Norm, UN R129/03
- Height 45 cm – 105 cm
- Weight: max. 18kg
- Age: From birth up to approx. 4 years
- 360° rotating mechanism
- Rear-facing car seat
- Integrated L.S.P. System
- Energy Reduction Technology (ER-Tech)
- Height-adjustable headrest
- One-hand recline and rotation function
- Newborn Inlay
- 5-point harness system
- Energy-absorbing shell
- Belt holder
- Fabric covers machine washable at 30°
Installation with base: Pay attention to the i-size logo. If a vehicle seat is marked with this logo, it is suitable for use with all i-size child seats and therefore will not appear in our list of compatible vehicles. If your vehicle does not have an i-Size seat, please check the compatibility of your vehicle. If your vehicle is not displayed, please contact our customer service team.
- 710 mm
- 440 mm
- 640 mm
- 14 kg
What is included?
- Sirona Zi i-Size Toddler Car Seat
- Newborn Inlay
- Integrated Base
- User Guide
Fits in your i-Size compatible car.
You may also need
FAQ - Sirona Zi i-Size
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 the vehicle users manual. If your vehicle does not have an i-Size seating position, please check the vehicle compatibility list that is included or on our homepage whether the installation is allowed. If your car is not equipped with ISOFIX the use of the car seat is not allowed.
No, this car 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 (rear- and forward facing).
i-Size is an European standard for car seats. It specifies, among others, that infants must travel in a rear-facing position before the child's age exceeds 15 months and, for the first time, that side-impact protection is tested. To find out more about i-Size go to https://cybex-online.com/en-en/safety-regulations.
Thick clothing prevents the harness/vehicle belt or impact shield from lying tight against the body. Only a correctly adjusted restraint system can offer maximum protection. For this reason, your child should wear thin, well-fitting clothing. Thick clothing such as winter jackets and clothing with hoods (hoodies, teddy suits, etc.) as well as hats should be avoided. Once your child has been positioned in the seat, he or she can be covered with a blanket for warmth.
It is not permissible to use the car seat on lateral facing vehicle seats.
Yes, the side airbag can remain activated when using the car seat.
First select an appropriate vehicle seat. Then fold out the load leg. This has to lock with an audible CLICK. The car seat is installed using the vehicle’s ISOFIX anchorage points. Press the release buttons of the ISOFIX connectors and push it out of the base to their furthest extend. Then push the ISOFIX connectors into the ISOFIX anchorage points. Make sure it is locked with an audible CLICK and that the safety indicators show green. Next, push the base towards the backrest of the vehicle seat until it is fully aligned with the backrest. Moving the whole car seat from side to side will further brace it with the backrest. Make always sure that the load leg is folded out completely. Push the adjustment button on the load leg upwards and press it to pull the load leg out. After this, pull the load leg out to the next locking position. Make sure, the load leg indicator on the base shows green.
Only a headrest adjusted to the optimum height will give your child the best possible protection and comfort. The height can be adjusted in various positions. The headrest must be adjusted so no more than 2-3 cm fit between the child’s shoulders and the bottom of the headrest.
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 the L.S.P. on both sides of the car seat. If, however, there is insufficient space to install the L.S.P. nearest the middle of the vehicle, it is not absolutely essential. If the car seat is installed on the front passenger seat, or if a passenger is sitting beside the car seat in the rear of the vehicle, ensure that the L.S.P. element facing the inside of the car is folded away. For safety reasons, please ensure that the L.S.P. nearest the door is always installed.
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 to transport children in the rear-facing position of Sirona as long as possible, the car seat allows it up to a size of 105 cm, approx. 4 years.
The Sirona features Driving Direction Control which prevents the car seat from being rotated a full 360˚ until the child's age exceeds 15 months and reached a size of 76 cm. This is to ensure that the child travels in a rear-facing position before reaching the minimum age and a minimum size, as mandated by the i-Size regulation. During the child's first 15 months the rotation mechanism makes it easy to switch from the rear-facing position to the door-facing boarding position. Once the child has reached the minimum age and height you will be able to unlock the Driving Direction Control by moving a switch on the backrest to a point indicating the age and size of your child. This makes it possible to rotate the seat to the forward-facing position without having to remove and reinstall the seat, which can be an awkward task that can cause back strain. It is not a must to adjust the seat to a forward-facing position at this point, and in fact we recommend transporting children in the Sirona's rear-facing position for as long as possible.
When 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 to transport children in the Sirona in the rear-facing position as long as possible. An indicator on the headrest of the car seat shows the height of the child, from which the car seat can be changed to the forward-facing use at the earliest. In the beginning the car seat is blocked for forward facing use. To switch the car seat in a forward facing position move the headrest cover up and the backrest cover down and move the switch on the backrest to the age and size of your child. Then pull the position adjustment handle and while keeping the handle pulled, bring the seat shell into a completely upright position and rotate the seat shell forward-facing.
The newborn inlay should be removed when your infant reaches a height of around 61cm (corresponding to approximately 3 months). This ensures that your growing baby has enough space in the car seat.
No, this car seat is not approved for use on an airplane.
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 rear-facing car seat can be used by infants from 45 cm to a maximum height of 105 cm or a maximum body weight of 18 kg (approx. 4 years).
On either side of the car seat there is a little opening in the fabric of the seat cover indicated by stitching. If you look inside this opening you will see a grooved area in the car seat shell which the cup holder can be slotted into.
Yes, both are washable. Note however, that the foam in the newborn inlay needs to be removed before washing via dedicated slots. 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. Detailed instructions can be also found in the user guide.
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.
Please refer to the retailer where you bought your CYBEX car seat. They will deal with the matter on your behalf.
We generally advise against switching to the next car seat prematurely. Even if your child’s feet protrude outside the car seat, your child has not necessarily grown out of the car seat. However, if your child's head is protruding above the top edge of the highest headrest position and your child weighs over 18 kg, it is time to change the car seat, as it no longer affords sufficient protection to the vulnerable neck and head area. After changing the car seat, your child’s head should be positioned within the protective area of the height-adjustable headrest and, if existing, enabling your child to see comfortably over the impact shield. If your child disappears behind the impact shield, then he/she is definitely too small for the seat.