What is the primary purpose of quarter panels in a vehicle?

The primary purpose of quarter panels in a vehicle is to form part of the body structure. Quarter panels are the sections of a car's body located at the rear, typically on either side, and they serve integral roles in both aesthetics and functionality. Structurally, they contribute to the vehicle's overall strength and integrity, which is crucial for safety in the event of a collision. In addition to structural support, quarter panels house other components, such as the rear lights, and support various trim elements that enhance the vehicle's appearance.

While other functions mentioned, like supporting parts of the vehicle or enhancing aerodynamics, may be relevant in different contexts, they do not capture the primary function of quarter panels as effectively. The primary role is to maintain the structural integrity of the vehicle while also contributing to its design.