The cyclone assembly on any Dyson vacuum is one of the most integral components, so if you have a faulty cyclone, you won't have much luck vacuuming. Luckily, you can order a genuine replacement in the exact color you need! The cyclone assembly is so important because it's the component that filters and separates the dirt and debris, which then collects in the DC17 dust bin assembly. For more information, or assistance ordering, please give us a call today!