No. The brush is a consumable component. The 3-year limited warranty excludes parts that require routine maintenance.
The warranty covers defects in materials or workmanship that existed when you bought it. Normal wear and tear on the brush roll is not a defect.
WHAT IS COVERED: A motor that fails within 3 years under normal home use. A pump that was faulty from the factory.
WHAT ISN'T: Filters, brushes, belts, or damage from using unauthorized cleaners.
HEADS UP: Keep your proof of purchase. To get service for a covered defect, contact BISSELL Consumer Care at 1-800-237-7691. They cover shipping to send your unit in.