
Cybex Sirona SX2 i-Size Car Seat
Car Seat Features
- Rearward facing - 61cm to 105cm
- Forward-facing - 76cm to 105cm
- Suitable from birth with separate newborn inlay
- ISOFIX fitting
- Multiple recline positions
- Advanced Linear Side-impact Protection (L.S.P.)
- Cybex ER-Tech
- Built-in rebound bar
- 3-Year warranty when registered
- Need help? Read our Car Seat Guide
About this Car Seat
Installation of the car seat is easy to do thanks to the one-click with the ISOFIX connectors and the visual indicator means it’s easy to see if it has been installed correctly and safely. Then simply extend the leg and you are good to go.
Once the seat is installed, a simple press of a button allows you to rotate the seat. Place the seat in the entry/exit position, facing the door, to allow you to place your child in the seat easily and without breaking your back.
Don't forget, this seat is extended rear-facing, meaning that you can leave your child rear-facing all the way up to 105cm (approx. 4 years old) as experts advise this is the safest way for them to travel.
The Sirona SX2 features special Energy Reduction Technology, which helps to reduce the strain on your child's neck if they are facing forwards and the vehicle is involved in a head-on collision. It works with an innovative harness design that reduces the forces on the neck by up to 20% compared to other harness systems.
The seat also features integrated Advanced Linear Side Impact Protection – these are small arms that automatically flick out and work in conjunction with the energy-absorbing shell of the seat to reduce those harmful forces by up to 25%.
The seat has a height-adjustable headrest - it moves up to 12 positions, growing as your little one does and the seat also reclines on the base to 5 positions when rearward facing and to 3 positions when forward-facing. For practicality, the Sirona SX2 has a belt holder at the sides to hold the harness out of the way whilst you put your child in the seat.
A separately sold newborn insert is available and will allow the seat to be used from birth.
Length | 71cm |
Width | 49cm |
Height | 68cm |
Weight | 14.1kg |
Brand | Cybex |
MPN | 521003071, 521003073, 521003075, 521003077, 521003079, 521003081, 521003083, 521003085, 522002033, 522002041, 522002049, 522002057, 522002065, 522002073, 522002081, 522002089 |
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Here's how it works

Step 1
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Step 2
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Step 3
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Payments Information
Pay in 30 days
Make your purchase today so you can try before you buy. Only pay for what you keep. Pay up to 30 days later. No interest. No fees when you pay on time. No impact to your credit score.
Paying after delivery allows you to try before you buy and is the easiest way to shop online.
- Complete the payment in full after purchase at no added cost.
- Report returns directly in our app and only pay for the items that you keep.
- Not making your payment on time could affect your ability to use Klarna in the future.
- Debt collection agencies are used as a last resort
You must be 18+ and a UK resident to be eligible for this credit offer. Pay Later Terms and Conditions
Pay in 3 interest-free instalments
Spread the cost of your purchase into 3 interest-free instalments. The first payment is made at point of purchase, with remaining instalments scheduled automatically every 30 days. No interest or fees. Select the Klarna option and enter your debit or credit card information. To check your eligibility, Klarna will perform a soft search with a credit reference agency. This will not affect your credit score.
No interest. No fees when you pay on time. No impact to your credit score.
- A new way to pay that's an alternative to a credit card.
- 3 instalments gives you flexibility to shop without interest or hidden fees.
- Not making your payment on time could affect your ability to use Klarna in the future.
- Debt collection agencies are used as a last resort.
You must be 18+ and a UK resident to be eligible for this credit offer. Pay in 3 Terms and Conditions
About Klarna
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Frequently asked questions
Visit our FAQ page (https://www.klarna.com/uk/customer-service/) to find out more about using Klarna.
About Klarna
At Klarna, we have a relentless focus on creating the best shopping experience in the world. We believe payments are so much more than just a way to send money. That's why our smooth checkout options give you more time and control so you can focus on the things you love.
- More than 90 million shoppers are using Klarna.
- 200,000 retailers are working with us worldwide.
- We're one Europe's largest banks and we've been powering online checkouts for over 15 years.
Uber Kids acts as an introducer and not a lender of unregulated credit products provided by Klarna Bank AB (publ). Credit is only available to permanent UK residents aged 18+, subject to status, T&Cs apply.
Please note Pay in 30 days and Pay in 3 instalments is not regulated by the FCA. Borrowing beyond your means could seriously affect your financial status, ensure you can afford to make your repayments on time by the due date.
Please spend responsibly. Borrowing more than you can afford could seriously affect your financial status. Make sure you can afford your monthly repayments on time.
For international shipping please visit our delivery page.
For information about returning an item please visit our returns page.
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