In a Vehicle-to-Vehicle Frontal Crash Prevention 2.0 test conducted by the Insurance Institute for Highway Safety (IIHS), the Lexus NX achieved a “Good” rating - the highest possible - for its performance in forward collision warning and automatic braking systems, demonstrating its excellent capabilities in preventing collisions. The Infiniti QX50 has not been tested.
When descending a steep, off-road slope, the NX’s standard Downhill Assist Control allows you to creep down safely. The QX50 doesn’t offer Downhill Assist Control.
Both the NX and QX50 have rear cross-traffic warning, but the NX has Parking Support Brake (automatically applies the brakes) to better prevent a collision when backing near traffic. The QX50’s Rear Cross Traffic Alert doesn’t automatically brake.
The NX’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 QX50 doesn’t offer a driver alert monitor.
Both the NX and the QX50 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, 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, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and available around view monitors.
Side impacts caused 23% of all road fatalities in 2018, down from 29% in 2003, when the Insurance Institute for Highway Safety introduced its side barrier test. In order to continue improving vehicle safety, the IIHS has started using a more severe side impact test: 37 MPH (up from 31 MPH), with a 4180-pound barrier (up from 3300 pounds). The results of this newly developed test demonstrates that the Lexus NX is safer than the QX50:
|
NX |
QX50 |
Overall Evaluation |
GOOD |
ACCEPTABLE |
Structure |
GOOD |
MARGINAL |
|
Driver Injury Measures |
|
Head/Neck |
GOOD |
GOOD |
Neck Tension |
156 lbs. |
178 lbs. |
Neck Compression |
22 lbs. |
89 lbs. |
Torso |
GOOD |
ACCEPTABLE |
Shoulder Deflection |
.55 in |
1.06 in |
Torso Max Deflection |
.98 in |
1.73 in |
Torso Deflection Rate |
4 MPH |
9 MPH |
Pelvis |
ACCEPTABLE |
MARGINAL |
Pelvis Force |
915 lbs. |
1316 lbs. |
Head Protection |
GOOD |
GOOD |
|
Passenger Injury Measures |
|
Head/Neck |
GOOD |
GOOD |
Torso |
GOOD |
GOOD |
Torso Max Deflection |
1.1 in |
1.42 in |
Pelvis |
GOOD |
GOOD |
The Lexus NX has achieved the Insurance Institute for Highway Safety’s (IIHS) highest rating of “Top Safety Pick Plus” for the 2024 model year. This distinction is based on its exceptional performance in IIHS’ rigorous battery of safety tests. Specifically, it earned an “Acceptable” rating in the latest, more stringent moderate overlap front crash test, a “Good” result in the updated side impact test, and a “Good” score in the revised pedestrian crash prevention test. The QX50 is not even a standard “Top Safety Pick” for 2024.