It will clip if driven over the maximum output range, and break totally at extreme G values
(the datasheet ought to say this).
You should be aware, though, that airbags typically cause injury (they are designed to prevent
worse injury, not prevent injury), so I don't see any way you can test such a system ethically.
Placement of airbags is crucial too, as wrong placement can kill. False triggering is something
to think carefully about, as this could easily injure, and also create a subsequent accident for
which there is no airbag protection.
Everything to me says "this is not an amateur project, there is severe risk to life - this is how
to get a Darwin award". Basically unless you really know what you are doing, and go through
a series of instrumented crash-tests, you will increase the risk, not reduce it.