sonicare 4100 replacement heads
Worth a lookShows low returns (0.8%), but brand-locked demand (top 5 brands take 93% of clicks) keeps it on the watch list.
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Avg price
Great$21.52avg listing price — sweet spot $15–$100
Conversion
Great9.6%search→purchase rate — share of searches ending in a sale
Price range
Great$9.08–$47.34cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$815K$815K/yr · 396K searches
Growth
Okay+5.2%90-day search growth — must beat 0% to launch
Competition
Okay68%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Review moat
Bad15,731.5avg incumbent reviews — the moat a new listing must climb
Brand share
Bad93%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, sonicare 4100 replacement heads is a $815K/yr Amazon United States market (396K searches/yr). The top 5 brands hold 93% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 52/100.
Data updated Jul 14, 2026 · scored weekly · How we score niches
sonicare 4100 replacement heads market data
- Units sold / yr
- 40K–50K
- avg 1,500–2,000/product
- Revenue / yr
- $861K–$1.1M
- units × avg price
- Conversion rate
- 9.6%
- Avg BSR
- #48
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 75%
- Out of stock
- 6.8%
- Avg brand age
- 28 months
- Avg seller age
- 175 days
Competition & brand share
The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.Brands
8 flat
Sellers
29
Top-5 brand share
93%
Top 20: 100%
Top-5 click share
68%
Top 20: 100%
Open market
3%
- Philips Sonicare55%
- Brightdeal17%
- Boclengo10%
- pisonicleara6%
- Futulkyus5%
- toptheway4%
- Open — no brand owns it (2 brands, 3%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +5.2% search growth over the last 90 days.Peak months: May, Jun · busiest ÷ quietest = 2.3×
Top sonicare 4100 replacement heads search terms
- sonicare 4100 replacement heads57K/yr
- philips sonicare 4100 replacement heads55K/yr
- sonicare g2 replacement heads26K/yr
- philips sonicare g2 replacement heads22K/yr
- philips sonicare replacement heads g220K/yr
- sonicare g3 replacement heads15K/yr
- sonicare replacement heads g211K/yr
- phillips sonicare replacement brush head g212K/yr
- phillips sonicare 4100 replacement heads7K/yr
- g3 sonicare replacement brush heads9K/yr
Top sonicare 4100 replacement heads products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Philips Sonicare C2 Plaque Control - Genuine Replacement Electric Toothbrush Heads White 3 Pack HX9023/65
Philips Sonicare$28.234.8★72,269 rev
BrightDeal Replacement Heads for Philips Sonicare ProtectiveClean 4100 5100 6100 DiamondClean 9500 ExpertClean 7500 FlexCare HealthyWhite Electric Sonic Toothbrush C3 G3 W3 C2 G2 Brush White 6 Pack
Brightdeal$13.844.4★5,303 rev
Philips Sonicare G3 Two-in-One - Genuine Replacement Electric Toothbrush Heads White 4 Pack One Year Supply HX9054/65
Philips Sonicare$47.344.8★8,497 rev
Philips Sonicare G3 Two-in-One - Genuine Replacement Electric Toothbrush Heads White 2 Pack HX9052/77
Philips Sonicare$26.974.8★8,497 rev
Boclengo Toothbrush Heads for Philips Sonicare Replacement Heads G2 C2 C1 4100 Electric Replacement Brush Head Compatible with Phillips Sonicare Brush C2 G2 C1 for Philips Sonic Care Toothbrush 6 Pcs
Boclengo$9.794.4★295 rev
Newest
by launch datePhilips Sonicare G3 Two-in-One - Genuine Replacement Electric Toothbrush Heads White 2 Pack HX9052/77
Philips Sonicare$26.978,497 rev
Philips Sonicare C2 Plaque Control - Genuine Replacement Electric Toothbrush Heads White 6 Pack Up to 18 Month Supply HX9026/77
Philips Sonicare$43.0372,269 rev
Boclengo Toothbrush Heads for Philips Sonicare Replacement Heads G2 C2 C1 4100 Electric Replacement Brush Head Compatible with Phillips Sonicare Brush C2 G2 C1 for Philips Sonic Care Toothbrush 6 Pcs
Boclengo$9.79295 rev
Toothbrush Replacement Heads for Philips Sonicare C2 C1 4100 5100 Plaque Control 1 2 Series Electric Brush Head 4 Pack Black
Futulkyus$9.356,209 rev
Electric Toothbrush Heads for Philips Sonicare Replacement Heads C1 C2 G2 4100 W Replacement Brush Head Compatible with Phillips Sonicare Electric Toothbrushes C2 C1 G2 for Sonic Care Brush 6 Pcs
Boclengo$9.90295 rev
Trending
90-day click momentum
Replacement Toothbrush Heads for Philips Sonicare Replacement Heads Electric Replacement Brush Head Compatible with Phillips Sonicare C2 C1 4100 12 Pack
Joryama$10.404.6★
Pisonicleara Replacement Toothbrush Heads for Philips Sonicare(10 pcs)
pisonicleara$9.744.4★
Toothbrush Replacement Brush Heads for Philips Sonicare C1 C2 ProtectiveClean 4100 5100 5300 Electric Sonic Tooth Refill Head Plaque Control 10 Pack Black
Futulkyus$15.224.4★
Philips Sonicare C2 Plaque Control - Genuine Replacement Electric Toothbrush Heads White 6 Pack Up to 18 Month Supply HX9026/77
Philips Sonicare$43.034.8★
Boclengo Toothbrush Heads for Philips Sonicare Replacement Heads G2 C2 C1 4100 Electric Replacement Brush Head Compatible with Phillips Sonicare Brush C2 G2 C1 for Philips Sonic Care Toothbrush 6 Pcs
Boclengo$9.794.4★
What buyers say about sonicare 4100 replacement heads
What buyers praise and complain about, mined from review topics.What buyers love
“Good value for money”
“Fit great”
“Just as good as the name brand”
“As advertised”
“Good brush heads”
“The bristles are soft just like the description promised”
“Still does good job”
“Easy to use”
“Compatible, effective and cost-saving”
“seem very durable”
What buyers complain about
“Didnt fit”
“Too low quality for even this low price”
“Expensive”
“These cheap knockoffs are not compatible”
“Really hard”
“they constantly fall off”
“Do not clean teeth well”
“Poor Performer”
“This brush brand new is not as good as a worn out Sonic Care original manufacturer brush”
“Stiff Bristles”
Top return reasons
Common questions
- Is sonicare 4100 replacement heads profitable to sell on Amazon United States?
- The niche generates $815K/yr across 16 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +5.2%. Flapen's verdict: Worth a look (52/100).
- How competitive is the sonicare 4100 replacement heads niche?
- 8 brands and 29 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 93% of demand.
- What do buyers complain about in sonicare 4100 replacement heads?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Value For Money. The return rate is 0.8%.
- When does demand for sonicare 4100 replacement heads peak?
- Demand peaks in May–Jun; the busiest month runs 2.3× the quietest.
- What does it cost to enter the sonicare 4100 replacement heads niche?
- Listings span $9.08–$47.34; the average listing price is $21.52 (sweet spot $15–$100). The average incumbent carries 15,732 reviews — the moat a new listing must climb.