The specification of screws used for door panels is M6 or M8. According to relevant public information, the size of screws used on14th generation Sylphy door panels may vary with different parts, and the size of screws used on door panels is M6 or M8. The specific size may need to be determined according to the size and depth of screw holes in the door panel. If you need more accurate information, I suggest you consult the relevant vehicle maintenance manual or consult a professional vehicle maintenance technician. When replacing the door panel screws, we should pay attention to selecting the appropriate screw material and strength grade, and tighten them according to the specified torque to ensure the safety and stability of the door panel.