2019 Lexus UX Series vs. 2019 Infiniti QX50

Detailed Review, Specifications & Comparison

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Safety

The UX Series has standard Whiplash Injury Lessening Front Seatbacks, which use a specially designed seat to protect the driver and front passenger from whiplash. During a rear-end collision, the Whiplash Injury Lessening Front Seatbacks system allows the backrest to travel backwards to cushion the occupants and the headrests move forward to prevent neck and spine injuries. The QX50 doesn’t offer a whiplash protection system.

The UX Series has standard Secondary Collision Brake, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The QX50 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

The UX Series’ driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The QX50 doesn’t offer a driver alert monitor.

Both the UX Series and the QX50 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available blind spot warning systems, rear parking sensors and rear cross-path warning.

Warranty

There are over 12 percent more Lexus dealers than there are Infiniti dealers, which makes it easier should you ever need service under the UX Series’ warranty.

Reliability

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Lexus vehicles are better in initial quality than Infiniti vehicles. J.D. Power ranks Lexus 8th in initial quality, above the industry average. With 8 more problems per 100 vehicles, Infiniti is ranked 14th.

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Lexus vehicles are more reliable than Infiniti vehicles. J.D. Power ranks Lexus first in reliability, above the industry average. With 21 more problems per 100 vehicles, Infiniti is ranked fourth.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Lexus vehicles are more reliable than Infiniti vehicles. Consumer Reports ranks Lexus first in reliability. Infiniti is ranked 6th.

Fuel Economy and Range

On the EPA test cycle the UX Series gets better fuel mileage than the QX50:

 

 

 

MPG

UX Series

 

FWD

200 2.0 DOHC 4 cyl.

29 city/37 hwy

 

AWD

200h 2.0 4 cyl. Hybrid

41 city/38 hwy

QX50

 

FWD

2.0 turbo 4 cyl.

24 city/31 hwy

 

AWD

2.0 turbo 4 cyl.

24 city/30 hwy

Regenerative brakes improve the UX 250h’s fuel efficiency by converting inertia back into energy instead of wasting it. The QX50 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the UX Series Hybrid’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The QX50 doesn’t offer an automatic engine start/stop system.

To lower fuel costs and make buying fuel easier, the Lexus UX Series uses regular unleaded gasoline. The QX50 requires premium, which can cost 20 to 55 cents more per gallon.

Tires and Wheels

The UX Series’ tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the QX50’s standard 55 series tires.

Suspension and Handling

For better maneuverability, the UX Series’ turning circle is 2.2 feet tighter than the QX50’s (34.2 feet vs. 36.4 feet).

Chassis

The Lexus UX Series may be more efficient, handle and accelerate better because it weighs about 350 to 500 pounds less than the Infiniti QX50.

The UX Series is 7.8 inches shorter than the QX50, making the UX Series easier to handle, maneuver and park in tight spaces.

Ergonomics

If the windows are left open on the UX Series the driver can close them all at the outside door handle. On a hot day the driver can lower the windows at the outside door handle or from a distance using the keyless remote. (Your Lexus service department must activate this window function.) The driver of the QX50 can only close the windows from inside the vehicle, with the ignition on.

The UX Series’ standard outside mirrors include heating elements to clear off the mirrors for better visibility. Infiniti only offers heated mirrors on the QX50 Essential.

The UX Series offers optional automatic dimming rear and side view mirrors which automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The QX50 offers an automatic rear view mirror, but its side mirrors don’t dim.

Standard smartphone integration for the UX Series allows the driver and passengers access to select programs on their smartphones, including reading text messages aloud, playing internet radio stations and other connected activities without taking their eyes off the road or their hands from the wheel. The QX50 doesn’t offer factory integrated smartphone program access.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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