for children 5-50 lbs. / birth-8 years

Sonus Convertible Car Seat (Strawberry Pink)


Evenflo's Sonus Essential Convertible Car Seat offers a rear-facing weight rating of up to 40 pounds and a forward-facing weight rating of up to 50 pounds. Featuring a built-in ventilation system that provides traveling comfort for your child through all seasons,try this seat for a top notch extended-use option at an affordable price.


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Item No. 34712040

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Additional Information

Go with the Flow...

Rear-facing for infants and when ready, converts to forward-facing to keep your growing child traveling safely and comfortably. Evenflo's Sonus Essential Convertible Car Seat offers a rear-facing weight rating of up to 40 pounds and a forward-facing weight rating of up to 50 pounds. For added comfort, this seat offers a built-in ventilation system that provides traveling comfort for your child through all seasons. Try this seat for a top notch extended-use option at an affordable price.

The Sonus convertible car seat features:

  • Rollover Tested- Evenflo is leading the industry with the development of a dynamic rollover test
  • Air Flow Ventilation System - Offers built-in ventilation system that provides a comfortable seat for your child through all seasons
  • Extended Use- Accommodates your growing child longer with the broadest range of harness adjustments
  • Up-Front Adjust - Easy access harness tension system
  • 5 shoulder strap positions ensure proper fit always

Child Specs (5-50lbs)


  • Weight: 5-40 lbs (2.3-18 kg)
  • Height: 19-40 in. (48-102 cm)
  • Fit: Top of head is at least 25 mm (1 inch) below the top of the child restraint seat back.


  • Weight: 22-50 lbs (10-22.6 kg)
  • Height: 28-50 in. (71-127 cm)
  • Age: At least 2 years old
  • Fit: The tops of the child’s ears are at or below the top of child restraint seat back.

Product & Shipping Specs

  • Dimensions: 29.0 x 19.0 x 19.0
  • Product Weight: 15 lbs.
  • Package Width: 19.125
  • Package Weight: 14.9
  • Package Depth: 19.125
  • Package Height: 29.625

Safety Testing

At Evenflo, we continue to go above and beyond government standards to provide car seats that are tested at 2X the Federal Crash Test Standard.

  • Side Impact Tested: Meets or exceeds all applicable federal safety standards and Evenflo’s side impact standards.
  • Designed and tested for structural integrity at energy levels approximately 2X the federal crash test standard.
  • FMVSS 213: Federal Motor Vehicle Safety Standards for Child Restraint Systems
  • FMVSS 302: Federal Motor Vehicle Safety Standards for Flammability of Interior Materials
  • CMVSS 302: Canada Motor Vehicle Safety Standard
  • CMVSS 213: Canada Motor Vehicle Safety Standard
  • Certified For Use In Aircraft: When used with the internal 5-point harness this restraint meets FAA Inversion requirements for airplane use.
  • Evenflo Temperature Testing: All current Evenflo car seats are tested for product integrity at both high and low temperatures.

Use & Care

Read all instructions and warnings on the product, product labels, and instruction manuals before use. Consult your vehicle owner’s manual to determine proper placement of child restraint in your vehicle and familiarize yourself with your vehicle’s components.

Browse Instruction Manuals »

Cleaning Instructions
  • DO NOT lubricate or immerse in water any part of this child restraint, unless rinsing is permitted
  • Plastic and metal parts may be wiped clean with mild soap and water and dried with a soft cloth. Do not use abrasive cleaners or solvents.
  • Take care not to damage any labels.
  • The harness can be wiped clean with mild soap and water. Allow harness to air dry.
  • Machine wash the seat pad separately in cold water, delicate cycle. Tumble dry 10 to 15 minutes on low heat.
  • Periodically inspect and clean the restraint's crotch buckle of food, liquids, and other debris to ensure proper latching. Place the buckle in a cup of warm water and gently agitate the buckle back and forth. Press the red button several times while the buckle is in the water. Do not submerge the harness strap. To avoid damage to the buckle, do not clean the buckle with soap or detergents and do not use a lubricant.
Sonus Convertible Car Seat (Strawberry Pink) is rated 4.6 out of 5 by 32.
Rated 3 out of 5 by from Lightweight, easy to fit 3 across I received this car seat to review and I was so surprised at how light it was and how easy it would be to fit 3 across, however wish there was padding on the groin buckle as first time buckling I accidentally pinched my daughters leg. We have other Evenflo car seats and I also which this had the quick latch or sure latch to make easier installation and moving to other vehicles. The padding was soft and my daughter liked it and didn’t complain about comfort. Fits up to 40 pounds RF but only 50 for FF so wish it would go a bit higher FF to be able to stay in a harness longer.
Date published: 2018-02-23
Rated 5 out of 5 by from Perfect Car seat This car seat is super lightweight and so easy to install. The straps are easy to loosen and tighten so getting in and out is a breeze. I also love the way my toddler is positioned in the seat, it makes him sit a little higher up so that he can see. The cup holders are also perfect as they have the elastic band making all cups big and small remain in the cup holder and not on my floor. The straps are really easy to adjust higher and lower making this great for an ever growing toddler. The latch straps extend long enough making it super simple to buckle in your car. I’m super happy with this car seat and all of its features
Date published: 2018-02-21
Rated 5 out of 5 by from Great product for the price!! The car seat could’ve felt a bit more sturdy, however it was a great product for the price point. The fabric was soft and my child did not feel hot after sitting in the seat after a long drive. It was easy to install with the instructions being clear and concise. I used it both rear and front-facing with my 2-year old Just to get a feel for the installation on both and found both ways to feel safe a secure! My tot also loves the seat - which is the most important!
Date published: 2017-10-06
Rated 5 out of 5 by from Great mid level car seat! The first thing I loved about the carseat was how little it weighed! We have been switching our other carseat back and forth between our vehicles so I truly appreciate one that doesn’t break my back. The material feels like neoprene which means it’s super easy to clean when my little one eats/drinks in the car. We loved that both cup holders were square with an elastic band so all sizes of cups and juice boxes fit—I can even put a small storage container of snacks in one (that wouldn’t fit in the more standard cup holders). The clips are easy enough to use but are a little stiff to clasp/unclasp—I imagine the more we use it, the easier it will be. The straps could use some padding along the neckline, but since I can buy those anywhere, it wouldn’t deter me from buying. As far as my little one’s review, my 3 year old loves it! It has more room and MUCH THICKER padding for the bottom than our other very expensive car seat. She seems much more comfortable sitting for longer periods of time. It doesn’t have as many bells and whistles as the pricy options out there (as far as clips and seat adjustment), but for the price point it’s perfect.
Date published: 2018-02-22
Rated 5 out of 5 by from Lightweight, easy to install and clean, comfy! This isn't my first Evenflo car seat and there's a reason for that. With multiple kids, Evenflo is a wonderful product that won't break the bank. This seat in particular is great because it's roomy without being enormous. There are two easy-to-clean cup holders. The fabric is soft and and thick but breathable, and easily removed for washing. Great product!
Date published: 2017-10-10
Rated 5 out of 5 by from Love it! I received this on Saturday and rushed to try it out! I own 2 evenflo car seats already that are a bit on the bulky side because I wanted to make sure they were rollover tested, this car seat has a sleek sporty design but also has been rollover tested which is a huge plus! It’s compact design makes it perfect for compact vehicles. The fabric fella so soft and my dish here loves the cup holders on. Definitely recommend. My daughter is 2 years 3 months to give you an idea of her size.. she is a little on the big size for her age lol.
Date published: 2018-02-20
Rated 5 out of 5 by from Incredible value! As a Child Passenger Safety Technician, I value a safety seat with a straightforward install. As a parent, I value features that make my car seats convenient. Thankfully, this seat offers both! The Evenflo Sonus is a fantastic option for a car seat that will move between cars or used for travel. It's lightweight and could easily be carried onto an airplane for use, and is FAA approved. I installed this seat both rear- and forward-facing and found all installs easily achievable with the LATCH system and with the vehicle seat belt. I was able to get a proper install with less than 1" movement at the belt path in just a couple minutes. The Sonus has a small footprint, meaning it will fit well in even small vehicles. The recline mechanism for rear-facing is easy to engage and disengage, so it isn't difficult to change the seat's orientation from rear-facing to forward-facing. I am also very impressed with the high end features of this seat, especially for it's reasonable price point. There are two cup holders, expertly designed to allow a variety of cup sizes without making the car seat wider. There are buckle holders to keep the harness out of the way when you're putting a child in the seat, so you don't have to dig buckles out from under your child. The cover is plush and looks quite sturdy, where other seats in this price range tend to have simpler covers with less cushion. Overall, I am extremely happy with the Sonus. It has features that are great for travel and also every day use. It is easy to install and use. It's rear-facing limits (of 40" or 40 lbs) will allow most kids to remain rear-facing for around 3 years, which is excellent. It also has high top slots, so it should last a good while forward facing, as well. My 4 year old has one harness slot to go, and based on average torso growth, I anticipate that she will still fit in the seat for about two more years. I haven't gotten to try my almost 7 year old in it yet, but it might even possibly fit her still, as well.
Date published: 2017-10-05
Rated 5 out of 5 by from I purchased for my grandson. sturdy & well made Riding in comfort with Glamma! Well made and Samuel is one happy Baby Boy!
Date published: 2017-09-06
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