Back windows, or rear glass, provide rear visibility and contribute to vehicle structural integrity. Typically constructed of tempered safety glass or laminated glass, these components are installed within the vehicle’s rear body structure, often bonded or adhered with urethane sealant. Defrost grids are commonly integrated into the glass, utilizing resistive heating elements powered by the vehicle’s electrical system. Some back windows incorporate antennas for communication systems, requiring specific glass specifications. Replacement necessitates adherence to manufacturer torque specifications and sealant curing times to maintain weather sealing and structural rigidity.