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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 Blazer doesn’t offer pre-crash pretensioners.
Over 200 people are killed each year when backed over by motor vehicles. The X4 offers optional Active Park Distance Control which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The Blazer doesn’t offer backup collision prevention brakes.
To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the X4. But it costs extra on the Blazer.
The X4’s 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 Blazer doesn’t offer a driver alert monitor.
Both the X4 and the Blazer 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, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.
The X4 comes with a full 4-year/50,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The Blazer’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.
The X4’s corrosion warranty is 6 years and unlimited miles longer than the Blazer’s (12/unlimited vs. 6/100,000).
BMW pays for scheduled maintenance on the X4 for 1 year and 12000 miles longer than Chevrolet pays for maintenance for the Blazer (3/36,000 vs. 2/24,000).
From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that BMW vehicles are more reliable than Chevrolet vehicles. Consumer Reports ranks BMW 15 places higher in reliability than Chevrolet.
The X4 xDrive30i’s standard 2.0 turbo 4 cyl. produces 55 more horsepower (248 vs. 193) and 70 lbs.-ft. more torque (258 vs. 188) than the Blazer’s standard 2.5 DOHC 4 cyl. The X4 M40i’s standard 3.0 turbo 6 cyl. produces 50 more horsepower (355 vs. 305) and 96 lbs.-ft. more torque (365 vs. 269) than the Blazer’s optional 3.6 DOHC V6.
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 Blazer are solid, not vented.
For better traction, the X4 has larger standard tires than the Blazer (245/50R19 vs. 235/65R18).
The X4’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the Blazer’s standard 65 series tires. The X4 M40i’s optional 245/40R21 front and 275/35R21 rear tires have a lower 40 series front and 35 series rear profile than the Blazer RS/Premier’s optional 45 series tires.
For better ride, handling and brake cooling the X4 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the Blazer.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the X4 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Blazer doesn’t offer run-flat tires.
The X4 has standard front and rear gas-charged shocks for better control over choppy roads. The Blazer’s 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 Blazer’s suspension doesn’t offer adjustable shock absorbers.
The X4 is 3.9 inches shorter than the Blazer, making the X4 easier to handle, maneuver and park in tight spaces.
The engine in the X4 is mounted longitudinally (North-South), instead of sideways, as in the Blazer. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.
J.D. Power and Associates surveys of service recipients show that BMW service is better than Chevrolet. J.D. Power ranks BMW 8th in service department satisfaction (above the industry average). With a 8% lower rating, Chevrolet is ranked 10th.
The X4 offers an optional heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Blazer doesn’t offer a heads-up display.
The X4’s front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The Blazer’s passenger windows don’t close automatically.
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 Blazer’s manually variable intermittent wipers have to be constantly adjusted.
To help drivers avoid possible obstacles, the X4 has standard cornering lights to illuminate around corners when the turn signals are activated. The Blazer doesn’t offer cornering lights. The X4 also offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.
When the X4 is put in reverse, the passenger rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The Blazer’s mirror doesn’t automatically adjust for backing.
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 Blazer doesn’t offer an automated parking system.
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