ITEM# 521002975

Cybex Eternis S All-in-One Convertible Car Seat - Pepper Black

This item is discontinued.

Advanced Safety Technology

  • Linear Side-impact Protection absorbs up to 25% more impact forces in a collision
  • Steel reinforced frame provides strength and durability
  • Energy absorbing shell and base help reduce the forces felt by the child in a collision
  • 3-position reclining headrest keeps the head and neck in a proper position while asleep


  • Cup Holder
  • Newborn Insert
  • 6 Position One-Hand Recline
  • Steel Reinforced Frame
  • Dual-Level Indicators
  • No-Rethread Harness

What’s in the Box

  • Eternis S All-In-One Car Seat
  • Eternis S Newborn Insert
  • Dishwasher Safe Cup Holder
  • Harness & Buckle Pads


  • DIMENSIONS: 25.5" H x 19.75" W x 25.5" D
  • WEIGHT: 26 lbs
  • Rear-facing: 4 lbs to 50 lbs
  • Forward-facing: 22 lbs to 65 lbs
  • Belt-positioning Booster: 40 lbs to 120 lbs
Product Reviews
out of 5.0
13 Reviews
Ratings Snapshot
of Reviewers
Dallas, tx
Verified Buyer
Worth it!
October 21, 2023
Excellent car seat, very sturdy and material is great. It was easy to adjust as well
Lockport, Illinois
Verified Buyer
High quality carseat for a great value!
August 22, 2023
When my second child grew out of his infant seat, I moved him to the Cybex Sirona S that we already had (and LOVED) and bought this seat for my three year old. We no longer needed the swivel feature since my oldest could now climb in and out of the seat on his own, but we loved the Cybex brand after our great experience with the first seat. We were not disappointed when the Eternis arrived. It has that same great padding and fabric of our other Cybex seat. Not that looks are really important when it comes to choosing a carseat, but it does look nice! More importantly, I find that it is really easy to buckle compared to our graco seat. There is enough slack when you loosen the straps to easily get the kids in and out, and it unbuckles easily for me (but not easy enough the kids can do it).
I expected the installation to be tricky based on reviews, but I did not find it bad. It was pretty intuitive and I got it done quickly.

I love this seat so much, and it is really reasonably priced compared to other seats on the market! I will be buying a second for our other car.
  • - Lots of slack to easily get your kids in and out of the straps
  • - High quality fabric
  • - Easy to adjust the headrest height
  • - cupholder
  • - Easy install
  • -none so far! (I have had it for 5 months)
Verified Buyer
Excellent Car Seat, Great Price
June 12, 2023
Excellent car seat (especially for the money)!

In a pinch, I previously purchased the Maxi-Cosi Pria as a backup/travel car seat (from a different store) and was very disappointed in its quality. I returned it and purchased this instead.

It is AWESOME. The fabric is super nice, Easy to take off and wash everything. I especially LOVE the magnetic strap holds, the movable cup holder (which fits my daughter's wider cups), and the headrest you can tip backward for sleepy tots.

I have the Nuna Executive in my car which gets used the most but I think this is a really decent competitor at a fraction of the price. I loved this so much, I even bought another one so we wouldn't have to transfer it back and forth from my husband's car to my parent's car.

The installation is super easy and I love that it's an all-in-one.
  • - Smooth, sleek, easily washable fabirc
  • - Magnetic strap holds
  • - Wide, movable cup holder
  • - Tilt-able headrest for sleeping
McAllen Tx
Verified Buyer
Arrived on time and loos great!!
June 2, 2023
Arrived on time and looks great!
  • Fast shipping
Vista, California
Verified Buyer
Great price and quality product
October 6, 2022
Purchased for my son as an extra car seat for when he's picked up by the grandparents. Looks very sturdy and great quality. He is also very comfortable riding in it.
Hillsboro, Oregon
Verified Buyer
Just what we needed
September 2, 2022
This car seat is very nice. It is a little heavy and harder to install if you want to move it from vehicle to vehicle.
Denham Springs, Louisiana
Verified Buyer
August 9, 2022
Really love the look and aesthetic of the cybex brand very boujee looking and safe everything i was looking for ❤️
  • Very sleek elegant
  • Versatile
  • Belt installation is kind of confusing
Liliana D.
Verified Buyer
My baby is finally comfortable in the car seat.
June 26, 2022
I have spent 3 months researching on what car seat to buy for my almost one year old who had outgrown his infant maxicosi. This option was the best choice for sure. He fits loose but you see it is also secure and safe. I went to to select best ratings products. Here I could find the best cost benefits ratio and the color I wanted. The shipping was efficient and fast. There is only one thing that didn't met expectations but is product related not to blame albeebaby, it is advertised by cybex a nice magnet for belts and that's something it will push you to purchase but it doesn't work so good everytime.
My baby's height is 32in and weights 22 pounds for reference.
I would by this product again from you over and over and absolutely recommended to friends.
  • Nice, narrow space fitting and still making baby feel very comfortable. Beautiful look and design. Versatile and safe according to 5 ratings.
  • Magnetic belts doesn't work as advertised al the time. Difficult to use the recliner in seat feature.
Mar?a I.
Verified Buyer
Comfortable seat
June 9, 2022
We are happy with o?r perchase, eventhough is not the easiest to clean with just one seat cover we are ok.

  • Safe, comfortable. Sturdy, grows with Child.
  • Not the easiest to clean.
new orleans, LA
Verified Buyer
great value, ease of use
March 7, 2022
clean look, and easy to clean, install is comparable to other convertible car seats - a little tricky the first go-round. sale price was right!
San Francisco, CA
Verified Buyer
High quality car seat
July 28, 2021
This is a great deal on a high quality car seat.
Murrieta, CA
Verified Buyer
Very heavy
July 8, 2021
It’s nice but it’s extremely heavy. The headrest area is hard. It doesn’t seem to comfortable.
  • Small
  • Heavy
  • Hard
Verified Buyer
super confortable
May 7, 2021
the best option, easy to install
Customer Q&A
1 Question & 1 Answer
from Norman, OK asked:
September 28, 2023
Up to what height can the child be in the rear-facing position?
  • Rear facing height range: 17-48 inches tall or until the child’s head is within 1 inch of the top of the headrest or backrest, whichever is higher.
Submitted by: caren singer on September 28, 2023