How To Identify Your Toothbrush Model

Find the printed code on the base, back or near the shaft and search the complete code.

What matters for this question

Look at the underside, rear shell and area near the shaft after drying the handle. Enter the complete code, including characters after a slash.
If the marketing name returns several candidates, compare printed codes and market before opening a compatibility verdict.

How to apply it

Marketing names such as “Sonicare 4100” can cover pack colors and regional suffixes. A photo of the printed label can help you transcribe the exact HX, HY, EW or STW code. The finder shows candidate models but should not turn a partial match into a fit decision.

Explore this feature · Check your exact handle · Care boundaries

Sources and scope

ADA toothbrush and replacement guidance · dental professional organization; web full text; retrieved 2026-10-31