Vehicle body components comprise the structural framework and exterior panels, providing occupant protection and aerodynamic efficiency. These parts—including chassis, fenders, doors, and hoods—are utilized across all vehicle makes and models, dictating overall dimensions and crashworthiness. Construction materials range from steel and aluminum alloys to carbon fiber and composite polymers, each offering specific strength-to-weight ratios. Key technical features include panel gauge, weld specifications, corrosion resistance treatments, and precise dimensional tolerances for proper assembly and vehicle alignment. Increasingly, body components integrate mounting provisions for sensors and active safety systems.