Both the Supra and M4 offer rear cross-traffic warning, but the Supra Auto has Parking Support Brake (automatically applies the brakes) to better prevent a collision when backing near traffic. The M4’s Cross Traffic Warning doesn’t automatically brake.
Both the Supra and the M4 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, daytime running lights, lane departure warning systems, rearview cameras, driver alert monitors, available blind spot warning systems and rear parking sensors.

