Both the Mustang Mach-E and Leaf have child safety locks to prevent children from opening the rear doors. The Mustang Mach-E has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The Leaf’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
The Mustang Mach-E has standard Post Collision Braking, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Leaf 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 Mustang Mach-E offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Leaf doesn’t offer all-wheel drive.
Both the Mustang Mach-E and Leaf have rear cross-traffic warning, but the Mustang Mach-E has Cross Traffic Braking (automatically applies the brakes) to better prevent a collision when backing near traffic. The Leaf’s Rear Cross Traffic Alert doesn’t automatically brake.
Both the Mustang Mach-E and the Leaf have standard driver and passenger frontal airbags, front and rear side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and available around view monitors.
The Ford Mustang Mach-E weighs 493 to 1466 pounds more than the Nissan Leaf. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.
The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Ford Mustang Mach-E is safer than the Nissan Leaf:
|
|
Mustang Mach-E |
Leaf |
|
|
Passenger |
|
| STARS |
4 Stars |
4 Stars |
| HIC |
163 |
270 |
| Chest Compression |
.5 inches |
.6 inches |
| Neck Stress |
159 lbs. |
233 lbs. |
| Neck Compression |
66 lbs. |
86 lbs. |
| Leg Forces (l/r) |
257/9 lbs. |
209/461 lbs. |
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 Ford Mustang Mach-E is safer than the Nissan Leaf:
|
|
Mustang Mach-E |
Leaf |
|
|
Front Seat |
|
| STARS |
5 Stars |
5 Stars |
| HIC |
58 |
131 |
| Chest Movement |
.8 inches |
.8 inches |
| Hip Force |
249 lbs. |
377 lbs. |
|
|
Rear Seat |
|
| STARS |
5 Stars |
5 Stars |
| HIC |
93 |
257 |
| Spine Acceleration |
26 G’s |
48 G’s |
| Hip Force |
267 lbs. |
887 lbs. |
|
|
Into Pole |
|
| STARS |
5 Stars |
5 Stars |
| Max Damage Depth |
8 inches |
13 inches |
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 Ford Mustang Mach-E is safer than the Leaf:
|
|
Mustang Mach-E |
Leaf |
| Overall Evaluation |
GOOD |
ACCEPTABLE |
| Structure |
ACCEPTABLE |
MARGINAL |
|
|
Driver Injury Measures |
|
| Head/Neck |
GOOD |
GOOD |
| Head Injury Criterion |
115 |
211 |
| Neck Compression |
45 lbs. |
67 lbs. |
| Pelvis |
GOOD |
ACCEPTABLE |
| Pelvis Force |
825 lbs. |
1093 lbs. |
| Head Protection |
GOOD |
GOOD |
|
|
Passenger Injury Measures |
|
| Head/Neck |
GOOD |
GOOD |
| Head Injury Criterion |
42 |
158 |
| Neck Compression |
22 lbs. |
67 lbs. |
| Torso |
GOOD |
GOOD |
| Shoulder Deflection |
.87 in |
1.54 in |
| Shoulder Force |
268 lbs. |
335 lbs. |
| Torso Max Deflection |
.94 in |
1.38 in |
| Torso Deflection Rate |
4 MPH |
6 MPH |
| Pelvis |
GOOD |
ACCEPTABLE |
| Pelvis Force |
535 lbs. |
937 lbs. |
| Head Protection |
GOOD |
GOOD |
Instrumented handling tests conducted by the National Highway Traffic Safety Administration and analysis of its dimensions indicate that the Mustang Mach-E, with its five-star roll-over rating, is 1.2% to 2.1% less likely to roll over than the Leaf, which received a four-star rating.
The Ford Mustang Mach-E (built after August 2024) 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 Leaf is not even a standard “Top Safety Pick” for 2025.

