Britax · Convertible (0–4 y)

Britax Poplar

Based on 1 independent scored test: NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings (2024). The test scores average 80. With only 1 test, the ranking score is pulled down a little until more testers confirm it.

Tested for US & Canada

Shortlist score

Good

#118 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, 2024 · rear-facing mode

4/5★

4 stars

Our scale80

weight 0.35

Labels: 5
Instructions: 4
Securing child: 4
Vehicle installation features: 3

NHTSA Ease of Use rating for Rear-Facing mode (5-pt); seat type Convertible; model #E1C933QDI; evaluated seat manufactured 2024-06-29; test_year = year of manufacture of the evaluated seat (NHTSA does not publish a rating date in the data)

View on api.nhtsa.gov ↗

Car Seats for the Littles US · Editorial review

Car Seats for the Littles: Recommended Seats USA, 2026

Recommended

Pick or pass/fail. Shown, not scored.

CSFTL recommended-seats list (CPST editorial picks); section last modified April 3, 2026

View on csftl.org ↗

1 older or duplicate result not counted

NHTSA (National Highway Traffic Safety Administration) Car Seat Ease of Use Ratings US · Government / institute

NHTSA Car Seat Ease of Use Ratings, 2024 · forward-facing mode

3/5★

3 stars

Our scale60

not counted

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

Labels: 5
Instructions: 2
Securing child: 4
Vehicle installation features: 2

NHTSA Ease of Use rating for Forward-Facing mode (5-pt); seat type Convertible; model #E1C933QDI; evaluated seat manufactured 2024-06-29; test_year = year of manufacture of the evaluated seat (NHTSA does not publish a rating date in the data)

View on api.nhtsa.gov ↗

Also recommended: Car Seats for the Littles: Recommended.

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How we turn these into one number: methodology. Tested 2024–2026.