What component runs underneath the doors between the front and rear fenders on the left and right sides of the vehicle?

The rocker panel is the correct component that runs underneath the doors between the front and rear fenders on the left and right sides of a vehicle. This structural part is crucial as it provides support to the vehicle's body and contributes to its structural integrity. The rocker panel also serves as a barrier that helps protect the lower sides of the vehicle from debris, rust, and damage.

In addition to its structural role, the rocker panel can often be a point of repair in the event of a side-impact collision, making it an important element for appraisers assessing physical damage. Understanding the location and purpose of the rocker panel is essential for accurately evaluating vehicle damages and establishing repair costs.