The ornamental design for a surface configuration of a rear door for a vehicle, as shown and described.
FIG. 1 is a left, perspective view of a surface configuration of a rear door for a vehicle according to my novel design, the right, perspective view being mirror symmetrical;
FIG. 2 is a front view of the surface configuration of a rear door for a vehicle according to my novel design; and,
FIG. 3 is a left side view of the surface configuration of a rear door for a vehicle according to my novel design, the right side view being mirror symmetrical.
The broken lines are for illustrative purposes only and form no part of the claimed design.