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The all new Cybex Eternis S car seat with SensorSafe technology is the only seat your child will need from birth and beyond. With three modes (rear-facing, forward-facing and booster), this All-In-One Convertible Car Seat is designed for use from newborn infants up to 120 pounds. The Eternis S with SensorSafe incorporates critical safety technology into the chest clip of the car seat to alert when an unsafe situations arises. The alerts are provided through a vehicle receiver and the caregiver’s smartphone. The Eternis S with SensorSafe alerts when the driver accidentally leaves the child behind secured in the car seat, a child unbuckles their chest clip while the vehicle is in motion, the back seat has become too warm or too cold, and when a child has been seated for too long — All via a user-friendly smartphone app. The app also provides guidance on installation, how-to videos, FAQs and more. Originally developed to help prevent the rising number of infant hot car deaths, SensorSafe will chime through the installed vehicle receiver to alert when a child is still secured in the back seat after the car has been switched off. This reminds the caregiver to act quickly, but if the child is still secured after several minutes an alert will be sent to the caregiver’s cellphone through the downloaded app. If the situation is still not remedied, the designated emergency contact will receive an alert with the GPS coordinates of the vehicle’s last known position. This state-of-the-art safety technology is designed so there is no need to reinstall each time you drive. For ease, just keep the receiver plugged into your car’s OBD port to drive with that extra peace of mind.

Additionally, the Eternis S with SensorSafe car seat offers an adjustable Linear Side-impact Protection (LSP System), which absorbs up to 25% more impact forces in the event of a near side impact collision (when compared to the same car seat without LSP extended) and a patented 3-position reclining headrest, which helps prevent the child's head from falling forward while asleep, guiding the head and neck into a safe position. These features, combined with a steel reinforced frame for strength and durability provide advanced child safety protection and peace of mind.

What's Included:

  • Cybex Eternis S Car Seat with SensorSafe Technology
  • Removable Newborn Inlay
  • Cup holder


  • Use rear-facing from birth (about 4 pounds) to 50 pounds
  • Use forward-facing from 22-65 pounds
  • Use as belt-positioning Booster from 40-120 pounds


  • 5-point safety harness with SensorSafe Technology integrated in the chest clip (not used in Booster mode)
  • Adjustable Linear Side-impact Protection (LSP System) absorbs up to 25% more impact forces in the event of a near side impact collision
  • Patented 3-position reclining headrest helps prevent the child's head from falling forward while asleep, keeping the head and neck in a safe position and ensures a comfortable sleeping position
  • In-seat recline provides correct ergonomic positioning and extra legroom, allowing your child to safely ride rear-facing longer
  • 12-position, height-adjustable headrest with an integrated no-rethread harness for protection that grows with your child
  • 6-position one-hand adjustable recline for the best fit to your car
  • Magnetic buckle holders for easy entry and exit from the seat
  • Removable newborn inlay provides additional support for very small babies (4-11 pounds)
  • Removable cup holder can be positioned on either side and is dishwasher safe for easy clean up
  • Cozy harness pads and 2-position padded buckle for comfort
  • Steel reinforced frame provides strength and durability
  • Energy-absorbing shell and base help reduce the forces felt by the child in a collision
  • Dual belt adjusters to ensure a tight fit while dual level indicators to help ensure the proper angle
  • Innovative one-pull LATCH removal system
  • LATCH Connection storage provided under the seat when not in use
  • Ergonomic design in Cybex’s iconic Gold Design language
  • Designed and engineered in Germany
  • Fully upright, forward-facing dimensions: 20"W x 25.5"H x 25.3"D, weighs 26 pounds


  • Brand: Cybex
  • Model: Eternis
  • Model Number: 518002887
  • UPC: 4058511378732
  • Color: Pepper Black
  • Item Weight: 26 pounds
  • Product Dimensions: 25.3 x 20 x 25.5 inches
  • Target gender: Unisex
  • Minimum weight recommendation: 4 Pounds
  • Maximum weight recommendation: 120 Pounds
  • Material Type: Steel
  • Number of items: 1
  • Batteries required: No
  • Rear-facing minimum child weight: 4 Pounds
  • Rear-facing maximum child weight: 50 Pounds
  • Forward-facing minimum child weight: 22 Pounds
  • Forward-facing maximum child weight: 120 Pounds
  • Harness type: 5-Point

Cybex Eternis S All-in-One Convertible Car Seat with SensorSafe Technology - Pep

SKU: 39743285952697
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