The ornamental design for a vehicle side mirror, as shown and described.
FIG. 1 is a front perspective view of the vehicle side mirror showing my new design with mirror in a completely open condition;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a front perspective view thereof with mirror in a partially closed condition;
FIG. 6 is a rear perspective view thereof with mirror in a completely closed condition;
FIG. 7 is a front view thereof;
FIG. 8 is a rear view thereof;
FIG. 9 is a side view thereof; and,
FIG. 10 is a top view thereof.
The broken line showing portions of the vehicle side mirror is included for the purpose of illustrating environmental structure and forms no part of the claimed design.