Introduction
The side brush is responsible for cleaning the baseboard or the sides of objects it encounters.
Tools
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            Flip the Roomba over so that the wheels are facing up and the dust tray is closest to you. 
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            Using the J1 Phillips screwdriver, locate and unscrew the two 11mm phillips screws above the brushes on the battery panel. 
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            Remove the plastic plate from the battery box. 
 
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            Locate the 2 green tabs on the left and right of the big yellow battery. 
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            Grab the tabs with your hands and lift straight upward. 
 
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            Using the J1 Philips Screwdriver, remove the 15.5 mm screw located in the center of the side brush. 
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            Remove the brush by pulling upwards. 
 
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            Using the J1 Philips Screwdriver, remove the two 15.5 mm screws located on the bottom of the plate covering the bottom of the roomba. 
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            Lift upwards to remove the bottom plate. 
 
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            Using the J1 Philips Screwdriver, remove the two gold 15.5 mm screws located on the blue plastic module the side brush had previously been attached too. 
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            Lift the blue module upwards. The module contains the motor for the side brush. 
 
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To reassemble your device, follow these instructions in reverse order.