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For enhanced safety, the front and rear seat shoulder belts of the Lexus GS Series have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Infiniti Q50 doesn’t offer pretensioners for the rear seat belts.
The GS Series has standard Whiplash Injury Lessening Seats, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Whiplash Injury Lessening Seats system moves the headrests forward to prevent neck and spine injuries. The Q50 doesn’t offer a whiplash protection system.
An active infrared night vision system optional on the GS Series helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera and near-infrared lights to detect heat, the system then displays the image on a monitor in the dashboard. The Q50 doesn’t offer a night vision system.
The GS 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 Q50 doesn’t offer a driver alert monitor.
Both the GS Series and the Q50 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height-adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all-wheel drive, blind spot warning systems, rear parking sensors and rear cross-path warning.
There are over 12 percent more Lexus dealers than there are Infiniti dealers, which makes it easier should you ever need service under the GS Series’ warranty.
A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the GS Series’ reliability 34 points higher than the Q50.
J.D. Power and Associates’ 2019 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 11 more problems per 100 vehicles, Infiniti is ranked 19th, below the industry average.
J.D. Power and Associates’ 2019 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 22 more problems per 100 vehicles, Infiniti is ranked 11th.
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.
The GS Series’ 3.5 DOHC V6 produces 11 more horsepower (311 vs. 300) than the Q50 3.0t’s standard 3.0 turbo V6.
An eight-speed automatic is standard on the Lexus GS Series RWD, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Q50.
For better stopping power the GS Series’ brake rotors are larger than those on the Q50:
For better traction, the GS Series has larger standard tires than the Q50 (235/45R18 vs. 225/55R17).
The GS Series’ standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Q50’s standard 55 series tires.
For better ride, handling and brake cooling the GS Series has standard 18-inch wheels. Smaller 17-inch wheels are standard on the Q50.
The GS Series has a standard 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 Q50; 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.
The GS Series has standard front and rear gas-charged shocks for better control over choppy roads. The Q50’s suspension doesn’t offer gas-charged shocks.
For better handling and stability, the track (width between the wheels) on the GS Series is 1.4 inches wider in the front and 1.1 inches wider in the rear than the average track on the Q50.
The GS Series’ front to rear weight distribution is more even (53% to 47%) than the Q50’s (55.8% to 44.2%). This gives the GS Series more stable handling and braking.
The GS Series has 1.3 inches more front hip room, .6 inches more front shoulder room, .3 inches more rear headroom, 1.7 inches more rear legroom and 1.6 inches more rear hip room than the Q50.
The GS Series has a much larger trunk than the Q50 (18.4 vs. 13.5 cubic feet).
To make loading and unloading groceries and cargo easier, especially for short adults, the GS Series offers an optional power trunk, which opens and closes automatically by pressing a button. The Q50 doesn’t offer a power trunk.
J.D. Power and Associates surveys of service recipients show that Lexus service is better than Infiniti. J.D. Power ranks Lexus second in service department satisfaction. With a 3% lower rating, Infiniti is ranked fourth.
Unlike the driver-only memory system in the Q50 Sport/Red Sport 400, the GS Series offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.
The GS Series’ instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The Q50 does not have an oil pressure gauge.
The GS Series offers an optional heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Q50 doesn’t offer a heads-up display.
The GS Series’ power parking brake sets with one touch and releases with one touch or automatically. The Q50’s parking brake has to released manually.
The power windows standard on both the GS Series and the Q50 have locks to prevent small children from operating them. When the lock on the GS Series is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Q50 prevents the driver from operating the other windows just as it does the other passengers.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The GS Series offers available headlight washers to keep headlight output high. The Q50 doesn’t offer headlight washers.
A power rear sunshade is optional in the GS Series to help block heat and glare for the rear passengers. The Q50 doesn’t offer a rear sunshade.
The GS Series has standard heated front seats. Heated front seats cost extra on the Q50, and aren’t available on the Q50 Pure. The GS Series also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the Q50.
Optional air-conditioned seats in the GS Series keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The Q50 doesn’t offer air-conditioned seats.
According to The Car Book by Jack Gillis, the GS Series is less expensive to operate than the Q50 because it costs $227 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the GS Series than the Q50, including $65 less for a muffler, $13 less for front brake pads, $30 less for a fuel pump and $304 less for front struts.
Consumer Reports® recommends the Lexus GS Series, based on reliability, safety and performance. The Infiniti Q50 isn't recommended.
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