Amazon.com - Side Brush Module Motor for iRobot Roomba 500 600 700 800 900 I3 E5 E6 I3 I4 I5 I6 I7 I8 J7 Series Robot Vacuum Cleaner, Replacement Parts (Motor Module + Side Brush)
Amazon.com - iRobot Roomba i6+ (6550) Robot Vacuum with Automatic Dirt Disposal-Empties Itself for up to 60 Days, Wi-Fi Connected, Works with Alexa, Carpets, Smart Mapping Upgrade - Clean & Schedule by