The IS’ optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Legacy doesn’t offer pre-crash pretensioners.
The Lexus IS 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 Legacy doesn’t offer a front passenger side knee airbag.
The IS 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 Legacy 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.
The IS offers an optional Panoramic View Monitor to allow the driver to see objects all around the vehicle on a screen. The Legacy only offers a rear monitor and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the front or sides.
The IS has a standard blind spot warning system which uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. A system to reveal vehicles in the Legacy’s blind spot costs extra.
To help make backing out of a parking space safer, the IS has a standard rear cross-path warning system, which uses sensors in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. Rear cross-path warning costs extra on the Legacy and isn't available on the not available.
Both the IS and the Legacy 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, rearview cameras and available all wheel drive.
The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Lexus IS is safer than the Subaru Legacy:
|
IS |
Legacy |
|
Passenger |
|
STARS |
4 Stars |
4 Stars |
Chest Compression |
.5 inches |
.6 inches |
Neck Injury Risk |
41% |
43% |
New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.
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 and into a post at 20 MPH, results indicate that the Lexus IS is safer than the Subaru Legacy:
|
IS |
Legacy |
|
Front Seat |
|
STARS |
5 Stars |
5 Stars |
Abdominal Force |
203 lbs. |
216 lbs. |
|
Rear Seat |
|
STARS |
5 Stars |
5 Stars |
HIC |
162 |
220 |
Spine Acceleration |
28 G’s |
62 G’s |
Hip Force |
438 lbs. |
581 lbs. |
|
Into Pole |
|
STARS |
5 Stars |
5 Stars |
Spine Acceleration |
34 G’s |
38 G’s |
Hip Force |
650 lbs. |
681 lbs. |
New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.