The ornamental design for personal watercraft exterior element, as shown and described.
FIG. 1 is a right side elevation view of personal watercraft exterior element according to our design;
FIG. 2 is a front elevation view of the personal watercraft exterior element of FIG. 1;
FIG. 3 is a left side elevation view of the personal watercraft exterior element of FIG. 1;
FIG. 4 is a rear elevation view of the personal watercraft exterior element of FIG. 1;
FIG. 5 is a top plan view of the personal watercraft exterior element of FIG. 1;
FIG. 6 is a bottom plan view of the personal watercraft exterior element of FIG. 1; and,
FIG. 7 is a perspective view taken from a front, right side of the personal watercraft exterior element of FIG. 1.
Throughout the Figures, where shown, (i) the dashed lines showing additional structure of the personal watercraft exterior element and a personal watercraft having the personal watercraft exterior element thereon are for illustrative purposes only and form no part of the claimed design; (ii) the unshaded surfaces form no part of the claimed design; and (iii) the dotted/dashed lines illustrate unclaimed boundaries of surfaces claimed as part of the design.