A lot of fuzz and animal hair can sideline your robotic vacuum cleaner. Gears will break and strip from even moderate use...the average price from a de-hairing and cleaning is $75. If we have to rebuild your wheel modules think $75 labor and $40 per module. A new wheel module could cost $80. The average price for a battery is $50 (should be replaced every three years).
I just did a Roomba, rebuilt both wheel modules, the price was $135. Still cheaper than a new one. We provide sales, service, repair and maintenance for all types of robotic vacuum cleaners including Roomba vacuums. Fix your iRobot . Remember replace your battery every three years. Be careful to properly recycle the battery.