As an Amazon Associate I earn from qualifying purchases.Updated: April 10, 2026
The Side Brush on your iRobot Roomba i3+ sweeps debris and dirt into the main cleaning path, helping ensure efficient pickup. Over time, the bristles will wear down and become less effective. Replacing the Side Brush every 3 months ensures consistent cleaning power and prevents damage to other components.
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Function: Sweeps debris and dust towards the suction path for efficient cleaning
Signs it needs replacing: Visible wear on bristles, reduced debris pickup, unusual noises during operation
OEM vs aftermarket: OEM parts are designed specifically for your Roomba model and offer guaranteed compatibility. Aftermarket options may be cheaper but compatibility and quality can vary.
Installation: Simple installation typically involves removing a single screw or clip to replace the old brush with the new one.
Replacement schedule: every 3 months
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 on the every 3 months replacement cycle
Performance restoration after noticing reduced output or efficiency
Preventive replacement before a worn part causes secondary damage
Who Should Buy This
This replacement Side Brush is perfect for owners of the iRobot Roomba i3+ who have noticed a decrease in cleaning performance or visible wear on their existing brush.
Not ideal for: If your Roomba i3+ has experienced major malfunctions beyond just a worn Side Brush, a full device replacement may be more suitable.
Good to Know Before Buying
💡
Always confirm your exact model number (R350020) 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 i3+ Side Brush?
The part number is 4640240. Always verify this matches your exact model (R350020) before ordering, as similar models may use different parts.
How often should I replace the Side Brush on my iRobot Roomba i3+?
every 3 months
Will aftermarket Side Brush replacements work in my iRobot Roomba i3+?
Third-party parts are widely available and often cheaper than OEM. Look for listings that specifically mention compatibility with model R350020 and check buyer reviews for fit confirmation before purchasing.
Prices change frequently. See the latest deal on Amazon.