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Evenflo Chase LX Harnessed Booster Car Seat

A harness-to-booster seat with 2 modes: forward-facing harness 30 to 40 lb, 35 to 43.3 in; high-back booster 40 to 100 lb, 43.3 to 57 in.

At a glance

Fits children from 30 to 100 lb
Up to 57 in tall
2 modes: forward-facing harness, high-back booster
Seat weighs 9.14 lb
21.9 in wide
Certified for aircraft use

Shopping links paused for a recall check

NHTSA lists a campaign naming this model family (14C003000). I pause shopping links until I have read the campaign and checked which build dates it covers.

Evenflo product page Manual

Specifications checked against Evenflo’s US site and manual on September 17, 2026. Not hands-on tested. How I research

Who the Chase LX Harnessed Booster Car Seat fits

This seat covers 2 stages, and a child has to meet every limit of the stage they are in. Check the date label on the shell before using a hand-me-down; every seat has an expiry.

Forward-facing harness30 to 40 lb · 35 to 43.3 in · from 2 years: The child faces forward in the seat’s own harness. Use the top tether every time, and stay in the harness until the child outgrows it.
High-back booster40 to 100 lb · 43.3 to 57 in · from 5 years: The seat’s own back and belt guide route the vehicle belt across the shoulder, and the sides give the child something to lean on when they sleep.

A school-age child with a backpack beside an empty high-back booster

What are the Chase LX Harnessed Booster Car Seat weight, height and age limits?

Evenflo Chase LX Harnessed Booster Car Seat limits by mode
Mode	Child weight	Child height	Minimum age	Conditions
Forward-facing harness	30 to 40 lb	35 to 43.3 in	2 years	At least 2 years old; ears at or below top of headrest.
High-back booster	40 to 100 lb	43.3 to 57 in	5 years	At least 5 years old.

A child must meet every limit for the mode they use. The labels on your seat and its manual are the final word.

Chase LX Harnessed Booster Car Seat specifications

Seat weight: 9.14 lb
Width: 21.9 in
Depth: 18.9 in
Height: 29.3 in
Usable life: See the date label on the seat
Aircraft use: Certified for aircraft (see manual for which modes)
Crotch buckle positions: 2
Faa note: Manual: certified for aircraft in harness mode; NOT certified for aircraft use in booster mode.
Faa source: https://images.salsify.com/image/upload/s--frkhyIwz--/jwusgqehfcifwez4ofve.pdf
Specs source: https://www.evenflo.com/products/chase-lx-booster-seat

An empty car seat installed on a back seat, seen through an open car door

Will it fit your car?

At 21.9 in at its widest, measure your back seat before counting on three across. It weighs 9.14 lb, which matters if you will move it between cars or carry it through an airport.

Check your vehicle manual for lower anchor positions and any head-restraint rules.
Rear-facing seats need front-seat room: try the install behind the driver before you commit.
Certified for aircraft use, so it can travel as a seat rather than checked baggage.

What features does the Chase LX Harnessed Booster Car Seat have?

2 crotch buckle positions
Dual cup holders

Colors listed in the US

Jameson Gray, Jubilee Green.

Where Evenflo’s page and manual disagree

Recorded from manual.

When they differ, follow the manual and the labels on your seat.

Is the Chase LX Harnessed Booster Car Seat recalled?

NHTSA currently lists one campaign naming this Evenflo family: 14C003000. A campaign names a family, not always every build, so check your seat’s model number and date of manufacture against the campaign itself.

I have not reviewed these campaigns for this model yet, so shopping links stay paused here.

NHTSA recall search · Recent car seat recalls

Before you buy

Weigh and measure your child. The limits above are the manufacturer’s, and a child has to meet all of them for the mode they will use.
Confirm the exact version. Colors, retail exclusives and model numbers change limits more often than you would expect; Evenflo lists 2 colors of this seat.
Read the manual before you buy, not after. It is linked above and holds the fit rules, the install methods and the expiry.
Check recalls by model number and date of manufacture, and register the seat with Evenflo so you hear about the next one.

Sources

Other Evenflo booster seats

Model	Top child weight	Seat weight	Width	Usable life
Chase LX Harnessed Booster Car Seat (this seat)	100 lb	9.14 lb	21.9 in	—
Chase Plus 2-In-1 Booster Car Seat	100 lb	9.5 lb	21.9 in	—
Maestro Sport Booster Car Seat	100 lb	9.6 lb	19 in	—
GoTime No Back Booster Car Seat	120 lb	3 lb	7.44 in	—
GoTime LX Booster Car Seat	120 lb	7.1 lb	19.49 in	—