Evenflo Symphony DLX All-in-one Car Seat Review

Review of: Evenflo Symphony DLX

Use: Keeping Kids Safe while you Drive

We Like

  • 5-point harness and as a belt-positioning booster seat.
  • Easy to loosen and tighten the straps
  • As your child grows, simply move the height of the harness using the infinite slide harness
  • Offers a fair amount of leg room when in the rear-facing position
  • Easily and quickly installed in most vehicles
  • LATCH can be used up to 40 pounds
  • LATCH can be used while in booster mode
  • Does not take up a lot of space when in the rear-facing position
  • Approved by FAA for use in aircraft

We Don't Like

  • Does not have strap covers on the harness and there is no option for adding covers
  • Lack of built-in lock off device to assist with installation of seatbelt
  • Has a 37” height-limit in the rear-facing position, which is lower than on other convertible car seats
  • Harness cannot be replaced or removed
  • The seat is rather spacious, which could be a disadvantage when try to fit this car seat next to another car seat in some vehicles.


The Evenflo Symphony DLX car seat offers excellent value for parents searching for a safe and easy-to-install convertible. While many car seats can be difficult to install, the Evenflo Symphony offers the benefit of being extremely simple and fast to install and use correctly, giving parents greater peace of mind.

Product Description

The Evenflo Symphony DLX is an all-in-one-car seat that offers the convenience of being installed in only 60 seconds and requires no pulling. All it takes is two quick clicks and a push to ensure a fast and extremely snug vehicle installation.

The superior safety technology offered by this car seat works to reduce the forces of side impact crashes through a combination of expanded zone protection and advanced energy absorption.

Thanks to the all in one design, The Evenflo convertible car seat can be use from birth up to 110 pounds.

RELATED: Our complete review of Britax car seats

Safety Features

Evenflo Symphony DLX Safety Features

  • An all in one seat design for rear-facing/forward-facing/booster use.
  • 5-position adjustable headrest.
  • Infinite Slide harness system that can be adjusted easily to ensure the ideal height for your child.
  • SureLATCH lower anchor connectors.
  • LATCH attachments that can be used when the seat is in booster mode.
  • Integrated cup holders.
  • E3 Side Impact.
  • Upfront Harness Adjustment.
  • Upfront Multi-Position Recline.
  • Easy-Off Cover.

Evenflo Symphony DLX Safety Features

5 point harnessThe 5-point harness system ensures there is no need to continually fiddle with it to ensure an accurate fit as your child grows. Additionally, the head support can be decreased or increased as needed with one quick hand adjustment. Although the chest clip is often somewhat awkward or difficult on many car seats, that is not the case with the Evenflo Symphony 65 e3. Overall, it doesn’t get much easier than with this car seat.

The Evenflo Symphony DLX does have a number of benefits, but there are also a few potential drawbacks you should be aware of when considering the purchase of this convertible car seat. If there is a drawback to this model, it is the 37” height limit in the rear-facing position, which means the Symphony model might not be the best choice if you are interested in keeping your child in the rear-facing position past the age of two.

Even so, this model should be quite capable of accommodating even tall children in the rear-facing position until at least the age of two.

As a booster seat, the Evenflo Symphony is not the tallest model on the market. This means that many children will continue to need assistance in getting buckled into the seat. The generous seat on this car seat provides plenty of comfort, but it should be kept in mind that this could also become an issue if you plan to fit this seat next to another car seat.


Up-front reclineThe Evenflo Symphony 65 e3 offers a wealth of convenience features, including a cover that is relatively easy take on and off. Since car seats have a tendency to become somewhat dirty, the cover on this model is machine washable.

The cover should be washed separately on the delicate cycle in cold water with mild detergent. Toss in the dryer and tumble dry for 15 minutes on low heat and then remove. This car seat also features dual integrated cup holders, which is nice for easy access to drinks for your toddler.

A convenient central front adjuster mechanism allows the harness straps to be tightened and loosened quickly and easily. The inclusion of the infinite slide harness adjustment system makes it possible for the harness height to be set correctly. Whenever your child experiences a growth spurt, the harnesses can be adjusted quickly and easily.

Installation Instructions

Installation of the Evenflo Symphony DLX is also quite fast thanks to the inclusion of the SureLATCH connectors. There is very little room for error when installing this car seat. For parents who need to switch the car seat between vehicles and who are pressed for time, this can be quite handy and save a tremendous amount of frustration.
When installing this car seat, you will find the process to be fairly standard. The Symphony features two belt paths. One path for rear-facing and one belt path for forward facing.

Simply guide the seatbelt through the proper belt path and then lock it. Push down on the car seat to remove any slack. To set the recline, just squeeze the red bar located under your child’s feet and you can slide the seat to the desired recline position. This car seat features a no-rethread harness, which makes buckling your child feat and easy.


Generally, the positives on the Evenflo Symphony DLX far outweigh the drawbacks, which is why this model is such a popular option. This convertible car seat offers excellent convenience and safety features that will certainly appeal to many people. Since it does offer so much flexibility, this car seat is also an option for child care providers, grandparents, and other caregivers who may need the convenience of using a single car seat for kids of different ages. The fact that this car seat is made in the United States and offers an 8-year lifespan are also great advantages. Overall, this convertible car seat is a solid value for consumers looking for a car seat that offers extended use.

What's New?

Weight, Size, and User Manual

In the rear-facing position, this car seat can accommodate between 5 and 40 pounds and a child between 19" and 37" tall. At either of the two lowest positions, the top of the child’s heat should be a minimum of 1” beneath the headrest.

In the forward-facing position with the 5-point harness, the Evenflo Symphony DLX can accommodate a child who is at least 1-year old, between 22 and 65 pounds and a height of 50" or less. The child’s shoulders should be either at or beneath the top of the harness position.

In the booster mode, this car seat can accommodate a child who is at least 4 years old, between 40 and 110 pounds and has a height of 43.3" and 57".
Here is Download Evenflo Symphony DLX User Manual.