How to Repair the Rotation Sensor on a LEGO MINDSTORMS EV3 Motor – lechnology.com
Mindstorms EV3 Large Servo Motor (45502) Program Robot Parts LEGO Powe Functions | eBay
Powe Functions LEGO Mindstorms EV3 Medium Servo Motor (45503) Program Robot Part | eBay
LEGO MINDSTORMS EV3 Building Set Includes 3 Interactive Servo Motors, Remote Control, Improved And Redesigned Color Sensor, Redesigned Touch Sensor, Infrared Sensor And 550+ LEGO Technic Elements