2019 BMW X4 vs. 2019 Lexus UX Series

Detailed Review, Specifications & Comparison

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The X4’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The UX Series doesn’t offer pre-crash pretensioners.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the X4. But it costs extra on the UX Series.

The X4 offers an optional Surround View to allow the driver to see objects all around the vehicle on a screen. The UX Series only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

Both the X4 and the UX Series have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors, available lane departure warning systems, blind spot warning systems and rear cross-path warning.

The BMW X4 weighs 542 to 1016 pounds more than the Lexus UX Series. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.


The X4’s corrosion warranty is 6 years longer than the UX Series’ (12 vs. 6 years).

BMW pays for scheduled maintenance on the X4 for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Lexus only pays for the first scheduled maintenance visit on the UX Series.

There are over 43 percent more BMW dealers than there are Lexus dealers, which makes it easier should you ever need service under the X4’s warranty.


The X4 xDrive30i’s standard 2.0 turbo 4 cyl. produces 79 more horsepower (248 vs. 169) and 107 lbs.-ft. more torque (258 vs. 151) than the UX 200’s standard 2.0 DOHC 4 cyl. The X4 xDrive30i’s 2.0 turbo 4 cyl. produces 67 more horsepower (248 vs. 181) than the UX 250h’s standard 2.0 DOHC 4 cyl. hybrid. The X4 M40i’s standard 3.0 turbo 6 cyl. produces 174 more horsepower (355 vs. 181) than the UX 250h’s standard 2.0 DOHC 4 cyl. hybrid.

Fuel Economy and Range

Regardless of its engine, the X4’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) Lexus only offers an automatic engine start/stop system on the UX Series Hybrid.

The X4 has 6.6 gallons more fuel capacity than the UX Series Hybrid’s standard fuel tank (17.2 vs. 10.6 gallons), for longer range between fill-ups. The X4 has 4.8 gallons more fuel capacity than the UX Series’ standard fuel tank (17.2 vs. 12.4 gallons).

Brakes and Stopping

For better stopping power the X4’s brake rotors are larger than those on the UX Series:


X4 xDrive30i

X4 M40i

UX Series

Front Rotors

12.9 inches

13.7 inches

12 inches

Rear Rotors

13 inches

13 inches

11.1 inches

The X4’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the UX Series are solid, not vented.

Tires and Wheels

For better traction, the X4 has larger standard tires than the UX Series (245/50R19 vs. 225/50R18). The X4’s optional tires are larger than the largest tires available on the UX Series (F:245/40R20 & R:275/40R20 vs. 225/50R18).

The X4 M40i’s optional 245/40R21 front and 275/35R21 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the UX Series’ 50 series tires.

For better ride, handling and brake cooling the X4 has standard 19-inch wheels. Only 18-inch wheels are available on the UX Series. The X4 M40i offers optional 21-inch wheels.

The X4 offers an optional space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the UX Series; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.

Suspension and Handling

The X4 has standard front and rear gas-charged shocks for better control over choppy roads. The UX Series’ suspension doesn’t offer gas-charged shocks.

The X4 offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads or off-road. The UX Series’ suspension doesn’t offer adjustable shock absorbers.

For a smoother ride and more stable handling, the X4’s wheelbase is 8.9 inches longer than on the UX Series (112.8 inches vs. 103.9 inches).

For better handling and stability, the average track (width between the wheels) on the X4 is 2.4 inches wider in the front and 4.2 inches wider in the rear than the track on the UX Series.

The X4’s front to rear weight distribution is more even (50.1% to 49.9%) than the UX Series’ (57% to 43%). This gives the X4 more stable handling and braking.


The design of the BMW X4 amounts to more than styling. The X4 has an aerodynamic coefficient of drag of .3 Cd. That is lower than the UX Series (.33) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the X4 get better fuel mileage.

Passenger Space

The X4 has 7.4 cubic feet more passenger volume than the UX Series (97.8 vs. 90.4).

The X4 has 1.8 inches more front headroom, 2.4 inches more front shoulder room, .9 inches more rear headroom, 2.4 inches more rear legroom and 3.1 inches more rear shoulder room than the UX Series.

Servicing Ease

The engine in the X4 is mounted longitudinally (North-South), instead of sideways, as in the UX Series. This makes it easier to service and maintain, because the accessory belts are in front.


The X4’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The UX Series’ standard manually variable intermittent wipers have to be constantly adjusted.

The UX Series F SPORT’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The X4’s optional adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

Both the X4 and the UX Series offer optional heated front seats. The X4 also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the UX Series.

The X4’s optional Parking Assistant can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The UX Series doesn’t offer an automated parking system.


The BMW X4 outsold the Lexus UX Series by almost 10 to one during 2018.

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

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