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Britax Römer Adventure Plus 2 High-Back Booster Car Seat - Midnight Grey

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Britax Römer

Britax Römer Adventure Plus 2 High-Back Booster Car Seat - Midnight Grey

Amazon rating

4.7/ 5

318 shopper ratings

Source: Amazon ↗

Checked: 30 Oct 2026

BabiesPicks rating

7.7/ 10

An editorial assessment, separate from shopper ratings.

Available prices

Price and availability may change. Check the price and shipping at the store before buying. We may earn a commission at no extra cost to you.

About the product

Overview

The Adventure Plus 2 is a forward-facing high-back booster seat from Britax Römer for children 100-150 cm tall (about 3.5 to 12 years, per Britax). It is installed with the car's 3-point seat belt only, which makes it a practical choice for cars without ISOFIX anchor points. This is the Midnight Grey version, model number 2000036853.

Key features (per Britax, the user manual and the Amazon.sa listing)

  • Approved to UN ECE R129/03 (i-Size booster seat).
  • Height-adjustable headrest that grows with your child, plus a backrest that adjusts to the angle of the car seat.
  • Belt guides that position the lap and shoulder belt over the child's hips and shoulder.
  • Light at 5.2 kg and slim; Britax says three seats fit side by side in the back row of many cars.
  • Removable cover that can go in the washing machine (per ADAC).
  • Made in Germany.

What tests and reviews found

  • In ADAC's October 2023 test it scored 2.3 "good" overall (lower is better): safety 2.2, handling 2.5, ergonomics 1.9, pollutants 1.0.
  • ADAC found a low risk of injury in both the frontal and the side crash, good belt routing and a stable fit in the car.
  • ADAC's criticisms: slightly higher risk of incorrect use, minor workmanship flaws and thin padding.
  • In the same ADAC round, the CYBEX Solution T i-Fix (2.0) and Maxi-Cosi RodiFix S i-Size (2.1) scored a little better.
  • Que Choisir describes it as a simple, fairly cheap, compact and light booster; it replaces the original Adventure Plus, which Que Choisir had flagged for a design flaw in the height-adjustment lock.
  • The Amazon.sa listing holds 4.7/5 from 318 ratings, 81% of them five stars; reviews shown come from several Amazon countries.

Who it suits

  • Children from about 4 years old (ADAC's advice) up to 150 cm.
  • Families whose car has no ISOFIX, or who move the seat often between cars, such as for grandparents or carpooling.
  • Anyone who needs to fit a booster next to other car seats in a narrow back row.

Limits before buying

  • No ISOFIX: the seat is held only by the car's belt. If you want ISOFIX connectors, Britax sells an ISOFIX twin called the Discovery Plus 2.
  • The Amazon.sa bullet points mention ISOFIX connectors, but those describe the Discovery Plus 2; Britax and ADAC confirm the Adventure Plus 2 is belt-only.
  • In some cars the headrest can't be raised fully for lack of space; Britax says to use it only up to 135 cm in those cars.
  • ADAC rated the padding as thin, which may matter on long trips.
  • The car's buckle must not sit in or in front of the dark-green lap-belt guide; if it does, choose another seating position.

Care and use

  • Buckle the seat in with the car belt even when it's empty, so it can't fly around in a sudden stop.
  • Never use the seat without its original cover; the cover is part of the safety system.
  • Clean plastic parts with mild soapy water and no solvents.
  • Replace the seat after any accident above 10 km/h, even if no damage is visible.
  • Don't leave it in strong direct sun when not in use, since parts can get hot.

Why this rating?

A light, simple high-back booster that scored 2.3 "good" in ADAC's October 2023 test, with a low injury risk in both frontal and side crashes and very low pollutants. Que Choisir also tested it and calls it simple, compact and fairly cheap. It holds 4.7/5 from 318 ratings on Amazon.sa and is sold by Amazon.sa at a price close to its European price. We lowered the quality score for ADAC's notes on thin padding, minor workmanship flaws and a slightly higher misuse risk, and the long-term score because it has no ISOFIX and some cars limit it to 135 cm. We haven't tested it ourselves; this assessment is based on the cited sources.

A good fit if

  • Best from about age 4, per ADAC
  • If your car has ISOFIX and you want the extra stability, consider the Discovery Plus 2 twin instead
  • Check that the car's buckle doesn't sit in or in front of the dark-green lap-belt guide

Product strengths

  • Low injury risk in ADAC's frontal and side crash tests, with good belt routing
  • Light (5.2 kg) and slim, easy to move between cars and fits three across in many cars
  • Simple belt-only installation that works in cars without ISOFIX
  • Cover comes off easily and is machine washable
  • Sold and shipped by Amazon.sa at a price close to its European price

Before you buy

  • No ISOFIX connectors, so the empty seat must also be buckled in
  • Thin padding, per ADAC
  • ADAC noted a slightly higher risk of incorrect use and minor workmanship flaws
  • In some cars the headrest can't be fully raised, limiting use to 135 cm

Product specifications

ASIN
B0BDC44K8W
Model number
2000036853 (Adventure Plus 2, Midnight Grey)
Seat type
High-back booster seat, forward facing
Approval
UN ECE R129/03 (i-Size booster seat)
Child height
100-150 cm (100-135 cm in cars where the headrest can't be fully raised, per Britax)
Age
Approx. 3.5-12 years (per Britax); ADAC advises from about 4 years
Installation
Car's 3-point seat belt only; no ISOFIX
Seat weight
5.2 kg
Dimensions (D x W x H)
42 x 44 x 63 cm (per Amazon.sa)
ADAC test (October 2023)
Overall 2.3 good; safety 2.2; handling 2.5; ergonomics 1.9; pollutants 1.0 (lower is better)
Cover care
Removable, machine washable (per ADAC); clean plastic parts with mild soapy water (per Britax)
Country of origin
Germany
Colour
Midnight Grey