Subaru BRZ 2017 Owner's Manual page 122

1-7. Safety information
There are many types of collisions which might not necessarily require SRS
side airbag and SRS curtain airbag deployment. In the event of accidents
like those illustrated, the SRS side airbag and SRS curtain airbag may not
deploy depending on the level of accident forces involved.
122
The vehicle is involved in a side-on
impact in an area outside the vicinity of
the passenger compartment.
The vehicle strikes a telephone pole or
similar object.
The vehicle is involved in a side-on
impact from a motorcycle.
The vehicle rolls onto its side or roof.