Structural Integrity – The windshield is an important part of a vehicle’s energy management systems, which directs crash energy around the occupant compartment. If the windshield is improperly installed, the vehicle may crumple differently than the manufacturer intended, which may jeopardize occupants.
Rollover Strength – In a rollover accident, the windshield provides strength by helping to keep the roof from crushing in on any vehicle occupants. The windshield can supply anywhere from 30% to 50% of the vehicle’s rollover strength.
Airbag retention – On impact the windshield acts as a brace to support the passenger side airbag. If the windshield separates, the airbag does not have a constrained space, and it is not effective in protecting the occupant.