Windshields are laminated glass or polycarbonate assemblies installed as the foremost exterior component of a vehicle’s occupant protection system. They provide structural support to the roof and contribute to vehicle rigidity, while simultaneously offering visibility and impact resistance from debris and collisions. Integrated features commonly include a bonded rain sensor mounting surface, dedicated areas for rearview mirror attachment, and a UV-filtering interlayer. Advanced units may incorporate embedded heating elements for defrosting or heads-up display (HUD) projection compatibility. Replacement requires OEM-approved adhesives and adherence to specific curing times to maintain structural integrity and airbag deployment functionality.