In Season 5 there is a close-up of Lila Dash's car and you can see a head indent in the windshield that happens when you are thrown into it but the indent is the opposite of what it should be. The indent has to be placed outward not inward. Also, there should not be a head indent at all since she was broadsided and should have been forced to the other side of the car.
When David Dash has his hallucination, Lila Dash is shown leaning dead against the steering wheel of her car after the fatal accident, but it is obvious that there was no airbag deployed.