Side skirt for a motor vehicle

FIG. 1 is a perspective view of a side skirt for a motor vehicle showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom side view thereof;

FIG. 5 is an end view thereof; and,

FIG. 6 is an opposite end view thereof.

The rear surface of the side skirt of a motor vehicle contains no ornamentality and is not part of the claimed design. Accordingly, a rear view is not provided and any illustration of the rear surface in any of the Figures is hereby disclaimed.