Philips Sonicare for Kids (HX6321/02): problems, parts and running costs
Checked: 2026-10-19
Summary
An app-connected sonic toothbrush for children whose issues are comfort and wear rather than failures: the handle is large for small hands, some children find the vibration uncomfortable or ticklish, and the rubberized backs of the brush heads wear quickly with rough chewing. The running cost is replacement heads only — about $10 each, changed at least every three months, which Wirecutter puts at about $60 in the first year and about $140 over three years.
Common problems and fixes
- Handle is large for small hands — PCMag raised this on the earlier model, which shares the form factor. [3]
- Brush heads wear quickly with rough chewing — the rubberized backs of Philips kids brush heads show teeth marks and ripping with rough use, which can force earlier replacement than the usual interval. [4]
- Battery is not user-replaceable — there is no user battery part; the 2-year warranty is the coverage if the battery fails. [2]
Parts and consumables
- Compact replacement brush heads (HX6032 series, 2-packs) — the kid-sized heads; about $10 each (Wirecutter) [4]; change at least every three months; heads are rated for ages 3 and up. [1][4]
- Standard replacement brush heads (HX6042 series, 2-packs) — the larger heads; same store pricing and replacement interval; rated for ages 7 and up. [1][2]
No other replacement parts (battery, charger, handle) are listed on the support page, and the battery is not user-replaceable. [2]
Yearly running cost
Replacement heads are the only consumable. Wirecutter puts heads at about $10 each with changes at least every three months — about $60 in the first year (brush plus four heads) and about $140 over three years once heads are counted in. [4] The charging cradle is included [1] and the battery is not a user part [2], so there is no battery line item.
When it is a good buy
Philips USA lists the HX6321/02 at $34.96 (2026-10) [1]. At $30-35 it is reasonable value for parents who want the Bluetooth app coaching and brushing tracking; at $35-45 the value depends on whether the app is important; above $45 it is hard to justify over the alternatives. [4] Alternatives: the Design a Pet Edition at about $30 (Wirecutter, May 2026) — the better choice when the app is not needed, since it offers similar cleaning without Bluetooth [4]; the Oral-B Kids at around $25 — the better choice on a tight budget. [4]