See also:

Head airbags
In a lateral impact, the head airbag supports the head. ...

Side airbags
In a lateral impact, the side airbag supports the side of the body in the chest and lap area. ...

Measurement
Measurements are made by ultrasound sensors in the bumpers. The range is approx. 6 ft/2 m. An acoustic warning is first given: By the front* sensors and the two rear corner sensors at appro ...