Toyota Prius c 2014 Owner's Manual page 124

1-8. Safety information
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Types of collisions that may not deploy the SRS airbags (SRS front
airbags/SRS seat cushion airbags)
The SRS front airbags and SRS seat cushion airbags do not generally
inflate if the vehicle is involved in a side or rear collision, if it rolls over, or if it
is involved in a low-speed frontal collision. But, whenever a collision of any
type causes sufficient forward deceleration of the vehicle, deployment of the
SRS front airbags and SRS seat cushion airbags may occur.
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Collision from the side
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Collision from the rear
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Vehicle rollover