This is the Steering Servo for the MOTOMASTER ELIMINATOR Rock Racer.
Servo Removal
You can remove the Servo without separating the Front assembly from the rest of the truck. Just the body has to be removed so that you can disconnect the wires from the ESC. Remove the one screw from the Servo horn, and move the horn aside. Remove these three screws, and lift off the servo from its mounting posts.