Toyota PRIUS Manual page 210

1-9. Safety information
SRS airbag deployment conditions (SRS front airbags)

 The SRS front airbags will deploy in the event of an impact that exceeds
the set threshold level (the level of force corresponding to an approxi-
mately 20 - 30 km/h [12 - 18 mph] frontal collision with a fixed wall that
does not move or deform).
However, this threshold velocity will be considerably higher in the following
situations:
• If the vehicle strikes an object, such as a parked vehicle or sign pole,
which can move or deform on impact
• If the vehicle is involved in an underride collision such as a collision in
which the front of the vehicle "underrides", or goes under, the bed of a
truck
 Depending on the type of collision, it is possible that only the seat belt
pretensioners will activate.
 SRS airbag deployment conditions (SRS side and curtain shield air-
bags)
The SRS side and curtain shield airbags will deploy in the event of an impact
that exceeds the set threshold level (the level of force corresponding to the
impact force produced by an approximately 1500 kg [3300 lb.] vehicle collid-
ing with the vehicle cabin from a direction perpendicular to the vehicle orien-
tation at an approximate speed of 20 - 30 km/h [12 - 18 mph]).
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PRIUS PHV_OM_OM47831E_(EE)