As an Amazon Associate I earn from qualifying purchases.Updated: March 19, 2026
The Main Brush Roll is essential for effectively cleaning dirt and debris on your iRobot Roomba s9+. Over time, the bristles will wear down, reducing its cleaning performance. Delaying replacement can lead to less effective cleaning and potential damage to other components in your robot vacuum.
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Function: The Main Brush Roll rotates to lift and remove dirt, dust, hair, and debris from floors.
Signs it needs replacing: Reduced suction power, visible wear on bristles, unusual noises during operation, or the brush roll not spinning freely.
OEM vs aftermarket: OEM parts offer guaranteed compatibility but are often more expensive. Aftermarket options can be a cost-effective alternative, but ensure they specify compatibility with your exact Roomba model (R750020).
Installation: Generally straightforward. Involves removing the old brush roll and inserting the new one, which may require some simple tools.
Replacement schedule: Check your owner's manual for the recommended schedule. Replace sooner if you notice reduced performance.
Compatibility warning: always verify part number matches your exact model before ordering
Pros & Cons
Pros
✓ Restores device to original performance without buying a new unit
✓ Significantly cheaper than a full device replacement
✓ Multiple options available from OEM and aftermarket sellers
Cons
✗ OEM parts cost more than third-party alternatives
✗ Wrong part number will not fit — model verification is essential
Common Use Cases
Scheduled maintenance: replacing on the manufacturer-recommended schedule
Performance restoration after noticing reduced output or efficiency
Preventive replacement before a worn part causes secondary damage
Who Should Buy This
This replacement part is ideal for iRobot Roomba s9+ owners whose device is experiencing reduced cleaning performance due to a worn Main Brush Roll. Replacing the brush roll extends your vacuum's life and restores its effectiveness.
Not ideal for: If your Roomba s9+ is experiencing multiple issues or is very old, a full device replacement may be more cost-effective in the long run.
Good to Know Before Buying
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Always confirm your exact model number (R750020) before ordering. Part numbers vary between model variants and production years. Check the label on your device or original documentation to be sure.
Frequently Asked Questions
What is the part number for the iRobot Roomba s9+ Main Brush Roll?
The part number is 4640222. Always verify this matches your exact model (R750020) before ordering, as similar models may use different parts.
How often should I replace the Main Brush Roll on my iRobot Roomba s9+?
Check your owner's manual for the recommended schedule. Replace sooner if you notice reduced performance.
Will aftermarket Main Brush Roll replacements work in my iRobot Roomba s9+?
Third-party parts are widely available and often cheaper than OEM. Look for listings that specifically mention compatibility with model R750020 and check buyer reviews for fit confirmation before purchasing.
Prices change frequently. See the latest deal on Amazon.