Some general characteristics of quality auto parts body panels: 1. Material: High-quality car body panels are made of durable and corrosion-resistant materials such as steel, aluminum or fiberglass. 2. Fit: The panel should fit perfectly with the body without gaps or misalignment. 3. Finish: Panels shall have a smooth uniform finish matching the vehicle's original paint color. 4. Strength: The panels should have sufficient strength to withstand impacts and bumps without cracking or denting. 5. Warranty: High quality auto body panels come with a warranty covering defects in materials and workmanship.