For enhanced safety, the front and rear seat shoulder belts of the Lexus RZ 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 Ford Mustang Mach-E doesn’t offer pretensioners for its rear seat belts.
The Lexus RZ has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps 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 Mustang Mach-E doesn’t offer a front passenger side knee airbag.
Both the RZ and the Mustang Mach-E have standard driver and passenger frontal airbags, front side-impact airbags, driver knee 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, post-collision automatic braking systems, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and driver alert 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 RZ is safer than the Mustang Mach-E:
|
RZ |
Mustang Mach-E |
Overall Evaluation |
GOOD |
GOOD |
Structure |
GOOD |
ACCEPTABLE |
|
Driver Injury Measures |
|
Head/Neck |
GOOD |
GOOD |
Neck Tension |
223 lbs. |
357 lbs. |
Torso |
GOOD |
ACCEPTABLE |
Shoulder Deflection |
.47 in |
1.42 in |
Shoulder Force |
156 lbs. |
268 lbs. |
Torso Max Deflection |
1.18 in |
1.42 in |
Torso Deflection Rate |
6 MPH |
9 MPH |
Pelvis |
GOOD |
GOOD |
Head Protection |
GOOD |
GOOD |
|
Passenger Injury Measures |
|
Head/Neck |
GOOD |
GOOD |
Neck Tension |
22 lbs. |
112 lbs. |
Torso |
GOOD |
GOOD |
Shoulder Deflection |
.24 in |
.87 in |
Shoulder Force |
112 lbs. |
268 lbs. |
Pelvis |
GOOD |
GOOD |
Pelvis Force |
469 lbs. |
535 lbs. |
Head Protection |
GOOD |
GOOD |
For its performance in IIHS driver-side and passenger-side small overlap frontal, moderate overlap frontal, updated side impact, headlight, daytime pedestrian crash prevention, and nighttime pedestrian crash prevention testing, the Insurance Institute for Highway Safety grants the RZ its highest rating: “Top Safety Pick Plus” for 2023, a rating granted to only 67 vehicles tested by the IIHS. The Mustang Mach-E was last a “Top Safety Pick Plus” in 2019 but no longer qualifies.