The ornamental design for a portion of a vehicleinstrument panel, as shown and described.
FIG. 1 is a perspective view of a portion of a vehicle instrument panel showing my new design;
FIG. 2 is a front view thereof; and,
FIG. 3 is a perspective view of the portion of a vehicle instrument panel, shown in closed position.
The broken line showings of the indicia on the controllers and the lines in the display area are for illustrative purposes only and form no part of the claimed design. The uneven broken line represents a boundary of the claim and is not intended to form a part of the claimed design.