ITEM# 518002887

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

Style:Pepper Black
Cybex Eternis S SensorSafe All-in-One Convertible Car Seat - Pepper Black
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Cybex Eternis S SensorSafe All-in-One Convertible Car Seat - Lavastone
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Advanced Safety Technology

  • SensorSafe provides alerts when unsafe situations arise
  • Linear Side-impact Protection (L.S.P.) absorbs up to 25% more impact forces in a collision when compared to the same car seat without L.S.P. extended
  • Patented 3-position reclining headrest helps keep the child’s head and neck in a proper position while asleep
  • Steel reinforced frame provides strength and durability
  • Energy absorbing shell and base help reduce the forces felt by the child in a collision


  • Linear Side-Impact Protection
  • SensorSafe Technology
  • 12 Position Height-Adjustable Headrest
  • 6 Position One-Hand Recline
  • Newborn Insert
  • Dual-Level Indicators

What’s in the Box

  • Eternis S with SensorSafe All-In-One Car Seat
  • Eternis S Newborn Insert
  • Dishwasher Safe Cup Holder
  • SensorSafe Chest Clip, Receiver 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
16 Reviews
Ratings Snapshot
of Reviewers
Bonner Springs, Kansas
Verified Buyer
July 21, 2024
We love our Cybex. I love how the car seat will grow with my child. I have found cleaning the seat is super easy which is a huge bonus with any toddler.
eureka, California
Verified Buyer
Defective and flawed design
November 5, 2023
Very flimsy car seat with major defects. The harness on our car seat does not pull tight without a massive amount of force. A grown man pulling as hard as he can barely moves it. The way the seat belt loops through the car seat is also very flawed because it is almost impossible to feed through and get tight. This is a very flawed and unsafe car seat. We tried to return it but albeebaby said to contact the manufacturer and Cybex said they will not return, only replace. Buyer beware, you can get stuck with a flawed and defective car seat.
Holly Ridge, North Carolina
Verified Buyer
Cybex Fan
May 24, 2023
I love the Cybex car seats! The features they offer ensure that my children are safe. I love this car seat for my son and plan on getting the same one for my daughter after she grows out of the infant car seat.
Toney, Alabama
Verified Buyer
Great carseat
January 28, 2023
Got this as a spare for my moms car. Super easy to install and sleek.
San Diego, ca
Verified Buyer
Favorite car seat
August 31, 2021
I love how sleek this car seat is and that it can be used since newborn and as a booster for when they get older.
Verified Buyer
Perfect car seats
July 21, 2021
I have purchased 2 of these for my 3 year old and 2 year old. My boys love them. Tnis car seat is specious yet very well protected. My boys love them, they enjoy our rides.
Larchmont, New York
Verified Buyer
Great brand
July 31, 2020
I love Cybex for their quality and high standards in their products. Car seat what grows with your child. Definitely a big plus. My child is comfortable in it. Only thing I wish we could try it out first. Is kind large and little bit to big to fit 3 car seat in one row.
  • Comfortable
  • Very large
Sydney s.
Midland tx
Verified Buyer
December 29, 2019
Very well made. My 2 year old daughter loves her new seat.
  • Easy install
  • Heavy
Carlos S.
Verified Buyer
Great seat, not so easy to install
October 11, 2019
The car seat is beautiful, is comfortable but is not easy to install. The straps are difficult to adjust, tightening the latch system is hard. The sensor safe only works in United States, if you go in a journey to another country the system is not going to work.
  • The car seat is beautiful, is comfortable
  • The straps are difficult to adjust, tightening the latch system is hard. The sensor safe only works in United States, if you go in a journey to another country the system is not going to work.
Waukegan, Illinois
Verified Buyer
A must have!
July 25, 2019
The technology of this car seat is amazing!
It’s definitely a game changer.

I would definitely recommend to my friends and family

I first received my car seat and there was some kind of burn mark ok the exterior of the car seat. After reaching out to customer service I got a replacement. Amazing customer service!
Best Uses
  • Every day
Vienna, VA
Verified Buyer
Love the brand
June 20, 2019
We had a Cybex infant car seat and it worked out great for us. I was thrilled to hear they also make convertible car seats. We ordered the Eternis S and it has worked very well. It’s very comfortable, fits our car perfectly, and love the head recline option! Not a lot of car seats offer this. My son’s head doesn’t move forward anymore, such a relief for his neck!
orlando, FL
Verified Buyer
A car seat from nb to 10 years
June 8, 2019
Love the color and quality, since I'll be able to use til my son is 10 years with the high capacity of it.
New Orleans, Louisiana
Verified Buyer
Everything looks good.
May 24, 2019
This is my second carseat and everything looks very good and secure.
Miami, Florida
Verified Buyer
Security and Design
May 10, 2019
Excellent car seat, amazing design and security system!
Verified Buyer
Love this car seat!
May 8, 2019
My 9 month old seems to be super comfortable in this seat. Love the sensor safe feature. I like that this is a all in one carseat that will grow with my baby.
San Francisco
Verified Buyer
So far so good
March 17, 2019
We’re a fan of Cybex baby gears and when this all-in-one car seat came out it was a must for us. We got two for both of our kids to ride in our SUV and they are so happy with it. They seemed comfortable enough to nap happily for long car rides. Well made, safe and well designed.
  • I wish the magnets on the side to hold the seatbelt up are stronger.
Customer Q&A