A vehicle side panel step structure includes a step, a mounting structure and a sub-side body panel. The mounting structure movably couples the step to the structural support for movement of the step between a retracted step position and an extended step position relative to a structural support of the vehicle. In the extended step position the step is approximately horizontally oriented relative to a main side body panel of the vehicle. A sub-side body panel is coupled to the mounting structure to move between a fascia mating position when the step is in the retracted step position and a non-fascia mating position when the step is in the extended step position. The sub-side body panel includes a contoured edge configured such that in the retracted step position the contoured edge of the sub-side body panel and a contoured edge of the main side body panel at least partially define the wheel well.