The ornamental design for a portion of a vehicleexterior, as shown and described.
FIG. 1 is a perspective view of a portion of a vehicle exterior showing our new design;
FIG. 2 is a front elevational view thereof; and,
FIG. 3 is a side elevational view, the opposite side elevational view being a mirror image thereof.
The broken line showing of the rectangular shape in the center of the grille depicts environmental subject matter and forms no part of the claimed design.