Amazon.com: Odashen Side Brush Motor Module for iRobot Roomba 500 600 700 800 900 I3 Series Robot Vacuum Cleaner (Replacement Motor Module + Side Brush +Screwdriver) : Industrial & Scientific
iRobot Roomba 500 Series Repair - iFixit
iRobot, 500 series Roomba. [The image is adopted from the website... | Download Scientific Diagram