For enhanced safety, the front and rear seat shoulder belts of the Ford Mustang 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 MINI Cooper Convertible doesn’t offer pretensioners for its rear seat belts.
In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Mustang are reminded to check the back seat. The Cooper Convertible doesn’t offer a back seat reminder.
The Mustang’s blind spot warning system uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. The Cooper Convertible doesn’t offer a system to reveal objects in the driver’s blind spots.
To help make backing out of a parking space safer, the Mustang’s standard Cross Traffic Alert uses sensors in the rear to alert the driver to vehicles approaching from the side and Cross Traffic Braking automatically engages the brakes to help avoid a collision. The Cooper Convertible doesn’t offer a rear cross-path warning system.
Both the Mustang and the Cooper Convertible have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, 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, rearview cameras and driver alert monitors.
The Ford Mustang weighs 436 to 1136 pounds more than the MINI Cooper Convertible. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts. Crosswinds also affect lighter cars more.