The Prius 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 Impreza 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.
Over 200 people are killed each year when backed over by motor vehicles. The Prius offers an optional Parking Support Brake that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The Impreza doesn’t offer backup collision prevention brakes.
The Prius Limited offers an optional Panoramic View Monitor to allow the driver to see objects all around the vehicle on a screen. The Impreza only offers a rear monitor.
The Toyota Prius offers an optional Panoramic View Monitor and it also offers an optional rear camera washer to make backing always safe, regardless of road dirt or grime, while the Subaru Impreza doesn’t offer a camera washer, requiring manual cleaning.
The Prius has a standard blind spot warning system that 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 Impreza’s blind spot costs extra.
To help make backing out of a parking space safer, the Prius has standard Rear Cross Traffic Alert to warn the driver of approaching traffic and automatically engage the brakes to help avoid a collision. Subaru charges extra for Rear Cross Traffic Alert on the Impreza and its not available on the Base and the Impreza’s Rear Cross Traffic Alert does not include automatic braking.
Both the Prius and the Impreza have standard driver and passenger frontal airbags, front side-impact 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 and rearview cameras.
The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Toyota Prius is safer than the Subaru Impreza:
|
Prius |
Impreza |
|
Driver |
|
STARS |
5 Stars |
5 Stars |
HIC |
163 |
222 |
Neck Stress |
237 lbs. |
267 lbs. |
Neck Compression |
25 lbs. |
99 lbs. |
Leg Forces (l/r) |
131/151 lbs. |
265/291 lbs. |
|
Passenger |
|
STARS |
5 Stars |
5 Stars |
Neck Injury Risk |
25.3% |
28.8% |
Neck Stress |
151 lbs. |
158 lbs. |
Neck Compression |
23 lbs. |
51 lbs. |
Leg Forces (l/r) |
249/159 lbs. |
291/273 lbs. |
New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.
The Insurance Institute for Highway Safety does 40 MPH moderate front offset crash tests on new cars. In this updated test, results indicate that the Prius is much safer than the Impreza:
|
Prius |
Impreza |
Overall Evaluation |
GOOD |
MARGINAL |
Structure |
GOOD |
GOOD |
|
Driver Injury Measures |
|
Head/Neck Rating |
GOOD |
GOOD |
Head Injury Criterion |
113 |
277 |
Chest Rating |
GOOD |
GOOD |
Thigh/hip Rating |
GOOD |
GOOD |
Leg/foot Rating |
GOOD |
GOOD |
Restraints |
GOOD |
GOOD |
|
Rear Passenger Injury Measures |
|
Head/Neck Rating |
GOOD |
GOOD |
Chest Rating |
GOOD |
MARGINAL |
Thigh Rating |
GOOD |
GOOD |
Restraints |
ACCEPTABLE |
MARGINAL |
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 Toyota Prius is safer than the Subaru Impreza:
|
Prius |
Impreza |
|
Front Seat |
|
STARS |
5 Stars |
5 Stars |
HIC |
167 |
194 |
Chest Movement |
.9 inches |
.9 inches |
Abdominal Force |
128 lbs. |
144 lbs. |
|
Rear Seat |
|
STARS |
5 Stars |
5 Stars |
Spine Acceleration |
50 G’s |
59 G’s |
|
Into Pole |
|
STARS |
5 Stars |
5 Stars |
Max Damage Depth |
11 inches |
13 inches |
Spine Acceleration |
34 G’s |
47 G’s |
Hip Force |
666 lbs. |
721 lbs. |
New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.
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 Toyota Prius is safer than the Impreza:
|
Prius |
Impreza |
Overall Evaluation |
GOOD |
GOOD |
Structure |
ACCEPTABLE |
ACCEPTABLE |
|
Driver Injury Measures |
|
Head/Neck |
GOOD |
GOOD |
Torso |
ACCEPTABLE |
ACCEPTABLE |
Shoulder Deflection |
1.54 in |
1.57 in |
Shoulder Force |
335 lbs. |
580 lbs. |
Torso Max Deflection |
1.46 in |
1.61 in |
Torso Deflection Rate |
9 MPH |
10 MPH |
Pelvis |
GOOD |
GOOD |
Pelvis Force |
759 lbs. |
892 lbs. |
Head Protection |
GOOD |
GOOD |
|
Passenger Injury Measures |
|
Head/Neck |
GOOD |
GOOD |
Neck Tension |
45 lbs. |
134 lbs. |
Torso |
GOOD |
ACCEPTABLE |
Shoulder Deflection |
1.42 in |
1.65 in |
Shoulder Force |
268 lbs. |
424 lbs. |
Torso Max Deflection |
1.06 in |
1.73 in |
Torso Deflection Rate |
5 MPH |
10 MPH |
Pelvis |
GOOD |
GOOD |
Pelvis Force |
692 lbs. |
736 lbs. |
Head Protection |
GOOD |
GOOD |
The Toyota Prius has achieved the Insurance Institute for Highway Safety’s (IIHS) highest rating of “Top Safety Pick Plus” for the 2025 model year. This distinction is based on its exceptional performance in IIHS’ rigorous battery of safety tests. Specifically, it earned a “Good” 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 Impreza is not even a standard “Top Safety Pick” for 2025.