Cybex Aton 5 + Aton Base 2-fix

Test year: 2017

ADAC overall rating: Good

General information:

  • Birth – 18 months | birth – 13 kg (birth – 28.6 lbs)
  • rearward facing
  • lightweight (4.8 kg)
  • The information provided here shows the result of the safety seat with the Aton Base 2-fix isofix installation.
  • perfect for premature babies and very small newborns


  • Aton Base 2-fix: the result here represents this version
  • isofix: Aton Base 2
  • seat belt

Cheapest Place to Buy:


ADAC result


Good safety

  • front impact crash with low risk
  • side impact crash with very low risk
  • belting is good
  • firm connection to the vehicle

Good operation

  • only buckle up the child
  • easy and fast installation
  • operating instructions and warnings are easy to follow
  • lightweight

Good ergonomics

  • leg rest is good
  • good upholstery
  • convenient seating position
  • little space is required in the car
  • child has good space

Good processing

  • washing machine possible
  • easily removable cover
  • workmanship is good

very good pollutants

  • Pollution is very low



  • bit increased risk of incorrect operation


  • child has impaired view to the outside


Cybex Aton 5 is a very safe and lightweight safety seat that can also be used as a carrier and a travel system on several buggies and strollers (e.g. Cybex, gb) with an adapter.
This review represents the installation with the Aton Base 2-fix isofix. It can also be installed with a seat belt or with the Base-2.

I think this seat with this base is the absolute perfect solution for those, who want to have a seat with an isofix for the best possible safety, but also insist on having the freedom to install the seat sometimes only with a seat belt (in other cars). So, most probably, this is the most flexible seat option with or without isofix that you can find on the market.

This is the fifth generation of the Aton seats, designed and engineered in Germany. Aton 5 cannot be used on airplanes.


  • A central adjuster helps to adapt the size and height of the harness and headrest to the baby. 8 different height positions are available.
  • The seat includes a newborn insert for an almost lie-flat position that can be removed as the baby grows. The function is to keep the head-neck-chest line in a flat position to prevent the baby’s head from falling forward causing serious breathing problems.
  • The Linear Side-impact Protection (L.S.P. System) protects the baby from a possible side impact by absorbing and channeling away the energy with its flexible material. You have to open the Linear Side-impact Protection on the side that is closer to the door. In case, you place the seat in the middle of the rear seats, you must not unfold the Linear Side-impact Protection.
  • The seat inlay is soft and padded.
  • The sun canopy is extra large with UPF50+ sun protection and can be adjusted into 4 different positions.
  • It has a 3-point harness system.
  • The shell is energy absorbing for side impact protection.
  • The cover can be washed on 30°.

Additionally, you can buy the Aton Base 2, footmuff, rain and summer cover, and insect net matching with the Aton 5 seat.

Cybex Aton 5 is available in several colors.

When the car seat is installed on the front passenger seat, you must switch off the front passenger airbag.

I hope you liked this review and if you have any question about the CYBEX Aton 5 with the Base 2-fix seat or want to leave your own personal experience, leave a comment below.

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