Is your side brush on your iRobot S9/S9+ robot vacuum broken or do you simply want to be prepared in case of an accident? We have the perfect replacement part for you that fits seamlessly with your vacuum. The side brush is easy to install, allowing you to resume cleaning your home in no time. Its purpose is to sweep all dirt and debris under your robot vacuum, which is then picked up by the main brush. If your side brush is defective, the cleaning performance will be significantly reduced. Our experience tells us that it is never a bad investment to be prepared for any defective parts on your robot vacuum. Therefore, acquiring a side brush for your iRobot is definitely no exception. Our replacement part is of high quality and will ensure that your robot vacuum continues to perform at its best.