Main brush end with square axle head that fits on drive motor does not fit on S5. The square bar is too big. You can remove the small axle from the old brush and use it. The rest of the main brush is the same. The side brushes are the same. Thanks to the filters, the dust container fits snugly to the vacuum cleaner. And the seals are worse than the original. But "seems" works fine. Time will tell if repeated removal of the dust bag will cause these seals to break due to being out of spec and being too tight against the body of the vacuum cleaner.