KidShortlist
Cybex · Convertible (0–4 y)

Cybex Sirona S

Based on 1 independent scored test: NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings (2021). The test scores average 100. With only 1 test, the ranking score is pulled down a little until more testers confirm it.

Tested for US & Canada
73
Shortlist score
Good
#96 of car seats for US & Canada
Single test

Where to buy

This seat is certified for US & Canada. Car seats may only be used in the market they're approved for, so we don't link to shops in Czechia.

Test results

Each score as the tester published it, converted to our 0–100 scale. Weight is how much the result counts towards the score.

NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings US · Government / institute
NHTSA Car Seat Ease of Use Ratings, 2021 · rear-facing mode (model #519004437)
5/5★
5 stars
Our scale100
weight 0.24
Labels
5
Instructions
5
Securing child
5
Vehicle installation features
5
NHTSA Ease of Use rating for Rear-Facing mode (5-pt); seat type Convertible; model #519004437; evaluated seat manufactured 2021-05-01; test_year = year of manufacture of the evaluated seat (NHTSA does not publish a rating date in the data)
View on api.nhtsa.gov ↗
3 older or duplicate results not counted
NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings US · Government / institute
NHTSA Car Seat Ease of Use Ratings, 2021 · forward-facing mode (model #519004437)
4/5★
4 stars
Our scale80
not counted

Not counted: Another configuration scored higher in the same test.

Labels
4
Instructions
4
Securing child
5
Vehicle installation features
5
NHTSA Ease of Use rating for Forward-Facing mode (5-pt); seat type Convertible; model #519004437; evaluated seat manufactured 2021-05-01; test_year = year of manufacture of the evaluated seat (NHTSA does not publish a rating date in the data)
View on api.nhtsa.gov ↗
NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings US · Government / institute
NHTSA Car Seat Ease of Use Ratings, 2021 · rear-facing mode (model #5190044327)
5/5★
5 stars
Our scale100
not counted

Not counted: Another configuration scored higher in the same test.

Labels
5
Instructions
5
Securing child
5
Vehicle installation features
3
NHTSA Ease of Use rating for Rear-Facing mode (5-pt); seat type Convertible; model #5190044327; evaluated seat manufactured 2021-10-01; test_year = year of manufacture of the evaluated seat (NHTSA does not publish a rating date in the data)
View on api.nhtsa.gov ↗
NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings US · Government / institute
NHTSA Car Seat Ease of Use Ratings, 2021 · forward-facing mode (model #5190044327)
5/5★
5 stars
Our scale100
not counted

Not counted: Another configuration scored higher in the same test.

Labels
4
Instructions
5
Securing child
5
Vehicle installation features
5
NHTSA Ease of Use rating for Forward-Facing mode (5-pt); seat type Convertible; model #5190044327; evaluated seat manufactured 2021-10-01; test_year = year of manufacture of the evaluated seat (NHTSA does not publish a rating date in the data)
View on api.nhtsa.gov ↗

Top-ranked alternatives

How we turn these into one number: methodology. Tested in 2021.

KidShortlist

We don't test products ourselves. Every score here comes from an independent tester and links back to it. We combine 4,061 results from 26 sources.

Read before buying

Several testers are paywalled, so we only include what they publish openly. Models change and get recalled. Check the tester's own page and the retailer listing before you buy.

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