Quick Answer

To replace the brush head on your Oral-B iO Series 9, simply pull the old head off, align the new head with the handle, and push until it clicks into place. Replace every 3 months for best results.

Why Correct Replacement Matters

The Oral-B iO Series 9 uses a magnetic drive system that delivers a unique cleaning motion. If the brush head isn't fully seated, the cleaning effectiveness can drop and the handle may vibrate oddly. A proper click ensures the head is locked and the bristles align with your teeth.

Brush head color fades over time as a reminder to replace it. When the bristles show wear or the color fades halfway, it's time for a new head. Using a worn head reduces plaque removal and can irritate gums.

Step-by-Step: How to Replace the Brush Head

  1. Remove the Old Head: Hold the handle firmly and pull the old brush head straight off. Do not twist or wiggle—pulling straight avoids damaging the internal magnetic coupling. Common mistake: twisting the head can loosen the connection over time. Always pull straight.
  2. Align the New Head: Take the new Oral-B iO brush head and align the bottom opening with the metal shaft on the handle. The head should slide on easily without forcing. Check that the head is oriented so the bristles point in the same direction as the previous head for consistent brushing angles.
  3. Push Until It Clicks: Press the head firmly onto the handle until you hear or feel a distinct click. This confirms the head is locked in place. A loose head won't clean effectively and may detach during use. If you don't feel a click, remove and try again. Never use the toothbrush without a secure lock.
  4. Test the Fit: Turn on the toothbrush for a second to ensure smooth operation. If you hear rattling or feel excessive vibration, the head may not be fully seated. Turn off and re-seat. A properly fitted head should feel solid with no wobble. Replace every 3 months or sooner if bristles fray.

Product Facts

  • Oral-B iO Series 9 Rechargeable Electric Toothbrush, White Alabaster: As color fades, cleaning fades—get back to 100% cleaning power with a fresh brush head every 3 months. The color-fading indicator on Oral-B iO Series 9 brush heads helps you know exactly when to replace for consistent plaque removal.

    Oral-B iO Series 9 Rechargeable Electric Toothbrush, White Alabaster

    Oral-B iO Series 9 Rechargeable Electric Toothbrush, White Alabaster