Which of the following panels is not considered a front-end component?

In the context of auto damage appraisal, the front-end components of a vehicle typically refer to parts that are situated at the front of the vehicle and are involved in both the protection and functionality related to impacts. Components like the bumper, hood, and fender are all parts that are directly associated with the front-end structure, contributing to safety and aerodynamics.

The floor pan, however, is a structural component that forms the base of the vehicle’s body. It supports the vehicle's chassis and is positioned beneath the passenger area, making it unrelated to the vehicle's front-end assembly. Because it does not serve a purpose at the front of the vehicle nor is it directly involved in front-end collisions or aesthetics, it is categorized separately from the front-end components.

Thus, identifying the floor pan as not being a front-end component aligns with the understanding of vehicle structure and design, focusing on the specific roles of various parts in relation to the front of the vehicle.