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Maxi-Cosi Romi 2-in-1 Convertible Car Seat

A convertible car seat with 2 modes: rear-facing harness 5 to 40 lb, 19 to 40 in; forward-facing harness 30 to 50 lb, 34.4 to 44 in.

At a glance

  • Fits children from 5 to 50 lb
  • Up to 44 in tall
  • 2 modes: rear-facing harness, forward-facing harness
  • Seat weighs 9.2 lb
  • 10-year usable life
  • Certified for aircraft use
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Maxi-Cosi product page (opens in a new tab) Manual (PDF, opens in a new tab)

Specifications checked against Maxi-Cosi’s US site and manual on . Not hands-on tested. How I research

Who the Romi 2-in-1 Convertible Car Seat fits

This seat covers 2 stages, and a child has to meet every limit of the stage they are in. Maxi-Cosi gives it a 10-year life from the date of manufacture, so check the date label before using a hand-me-down.

Rear-facing harness5 to 40 lb · 19 to 40 in
The child faces the back of the car, which keeps the head, neck and spine supported in a frontal crash. Keep this mode as long as the child fits it.
Forward-facing harness30 to 50 lb · 34.4 to 44 in
The child faces forward in the seat’s own harness. Use the top tether every time, and stay in the harness until the child outgrows it.
A toddler standing next to an empty convertible car seat

What are the Romi 2-in-1 Convertible Car Seat weight, height and age limits?

Maxi-Cosi Romi 2-in-1 Convertible Car Seat limits by mode
ModeChild weightChild heightMinimum ageConditions
Rear-facing harness5 to 40 lb19 to 40 inNot published—
Forward-facing harness30 to 50 lb34.4 to 44 inNot published—

A child must meet every limit for the mode they use. The labels on your seat and its manual are the final word.

Romi 2-in-1 Convertible Car Seat specifications

Seat weight
9.2 lb
Width
Not published
Usable life
10 years
Aircraft use
Certified for aircraft (see manual for which modes)

How the Romi 2-in-1 Convertible Car Seat installs

Lower anchors
1-click LATCH. Check your vehicle manual for which seating positions have anchors, and switch to the seat belt once the child passes the anchor weight limit in the manual.
Recline
No recline positions listed. The recline angle is what keeps a young baby’s airway open, so set it before tightening the install.
Harness
Adjustable harness (rethread). Check the harness height at each growth spurt: at or below the shoulders rear-facing, at or above them forward-facing.

Every install is a fit between one seat and one vehicle. Read both manuals, and use a free inspection station if anything is unclear.

An empty car seat installed on a back seat, seen through an open car door

Will it fit your car?

Maxi-Cosi does not publish a width for this seat, so measure your back seat and compare it with the seat in a store before buying. It weighs 9.2 lb, which matters if you will move it between cars or carry it through an airport.

  • Check your vehicle manual for lower anchor positions and any head-restraint rules.
  • Rear-facing seats need front-seat room: try the install behind the driver before you commit.
  • Certified for aircraft use, so it can travel as a seat rather than checked baggage.

What features does the Romi 2-in-1 Convertible Car Seat have?

  • 1-click LATCH
  • Adjustable harness (rethread)
  • No recline positions listed

Colors listed in the US

Sea Shadow – PureCosi.

Is the Romi 2-in-1 Convertible Car Seat recalled?

No campaign in the current NHTSA child-restraint data names this model family, and I have not run a separate review for it. Check your seat’s model number and date of manufacture before use.

NHTSA recall search · Recent car seat recalls

Before you buy

  1. Weigh and measure your child. The limits above are the manufacturer’s, and a child has to meet all of them for the mode they will use.
  2. Confirm the exact version. Colors, retail exclusives and model numbers change limits more often than you would expect.
  3. Read the manual before you buy, not after. It is linked above and holds the fit rules, the install methods and the expiry.
  4. Check recalls by model number and date of manufacture, and register the seat with Maxi-Cosi so you hear about the next one.

Sources

Other Maxi-Cosi convertible car seats

ModelTop child weightSeat weightWidthUsable life
Romi 2-in-1 Convertible Car Seat (this seat)50 lb9.2 lb—10 years
Sela All-in-One Convertible Car Seat100 lb27.25 lb—10 years
Kani 4-in-1 Convertible Car Seat100 lb23.2 lb—10 years
Pria Max+ All-in-One Convertible Car Seat100 lb16.5 lb—10 years
Pria Max All-in-One Convertible Car Seat100 lb16.8 lb—10 years
Pria All-in-One Convertible Car Seat100 lb16.5 lb—10 years
Petra All-in-One Convertible Car Seat100 lb14.75 lb—10 years

Other convertible seats whose published weight and height limits overlap the Romi 2-in-1 Convertible Car Seat.