The Lexus RX has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags help prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The Envision doesn’t offer a front passenger side knee airbag.
The RX has a standard Secondary Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Envision 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.
To deliver safety and visibility under dusty conditions the Lexus RX’s backup monitor has a standard rear washer to keep the view clear. A camera washer system is only offered on some models of the Buick Envision.
The RX’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 Envision doesn’t offer a driver alert monitor.
Both the RX and the Envision 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, 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, available all wheel drive and around view monitors.
The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH, results indicate that the Lexus RX is safer than the Buick Envision:
|
RX |
Envision |
|
Front Seat |
|
STARS |
5 Stars |
5 Stars |
HIC |
58 |
128 |
Chest Movement |
.3 inches |
.7 inches |
Abdominal Force |
99 lbs. |
139 lbs. |
Hip Force |
206 lbs. |
261 lbs. |
|
Rear Seat |
|
STARS |
5 Stars |
5 Stars |
HIC |
63 |
311 |
Spine Acceleration |
43 G’s |
52 G’s |
New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.