Hyundai Staria US4 2021 Owner's Manual page 132

Safety system
Just before impact, drivers often brake
heavily. Such heavy braking lowers the
front portion of the vehicle causing it
to "ride" under a vehicle with a higher
ground clearance. Air bags may not
inflate in this "underride" situation
because deceleration forces that are
detected by sensors may be significantly
reduced by such "underride" collisions.
Front air bags may not inflate in
rollover accidents because front air bag
deployment would not provide additional
occupant protection.
3-94
Information
With rollover sensor
The side and curtain air bags may inflate
in a rollover situation, when it is detected
by the rollover sensor.
Information
Without rollover sensor
The side and/or curtain air bags may
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inflate when the vehicle is rolled over
by a side impact collision, if the vehicle
is equipped with side and/or curtain air
bags.
Air bags may not inflate if the vehicle
collides with objects such as utility poles
or trees, where the point of impact is
concentrated and the collision energy is
absorbed by the vehicle structure.
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