coolant filter
Skip itSoft demand (-36.0% this quarter) — this niche doesn't clear our bar today.
Avg price
Great$55.86avg listing price — sweet spot $15–$100
Review moat
Great284.15avg incumbent reviews — the moat a new listing must climb
Returns
Great1.7%return rate — above 5% kills the launch gate
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Conversion
Good5.1%search→purchase rate — share of searches ending in a sale
Price range
Good$10.70–$164.32cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Okay$129K$129K/yr · 45K searches
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Brand share
Okay90%top-5 brand share — brands hold most of the demand
Growth
Bad-36.0%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, coolant filter is a $129K/yr Amazon United States market (45K searches/yr). The top 5 brands hold 90% of demand. Verdict: Skip it — 44/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
coolant filter market data
- Units sold / yr
- 2K–3K
- avg 100–250/product
- Revenue / yr
- $112K–$140K
- units × avg price
- Conversion rate
- 5.1%
- Avg BSR
- #3,817
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 54%
- Out of stock
- 0.0%
- Avg brand age
- 67 months
- Avg seller age
- 165 days
Competition & brand share
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
8 falling
Sellers
82
Top-5 brand share
90%
Top 20: 100%
Top-5 click share
69%
Top 20: 100%
Open market
5%
- Wix41%
- WIKIBB19%
- GJYSYP11%
- BANGTE10%
- Mishimoto9%
- Auto Parts Prodigy5%
- Open — no brand owns it (2 brands, 5%)
Demand
Weekly Amazon search volume, last 14 weeks — -36.0% search growth over the last 90 days.Top coolant filter search terms
- coolant filter19K/yr
- coolant filter kit14K/yr
- wix 24070 coolant filter4K/yr
- inline coolant filter6K/yr
- wix 240702K/yr
Top coolant filter 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 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
WIX Filters - 24070 Heavy Duty Coolant Spin-On Filter Pack of 1
Wix$14.864.8★2,058 rev
GJYSYP 5/8 in. Inline Coolant Filter Universal Filter and Inspection System Stainless Steel Screen For Pipe Bore 0.62 in.
GJYSYP$38.824.4★39 rev
WIKIBB 1-1/2 Universal Filter Inline Heater Core Coolant Filter and Inspection System Stainless Steel Filter Mesh Matching Fixture
WIKIBB$41.803.6★114 rev
BANGTE WF2071 Coolant Filter Spin-On with Filter Base Compatible with Freightliner International Peterbilt model Cummins ISL ISC ISB ISX Caterpillar C16 C15 C13 C12 Engine
BANGTE$31.504.8★10 rev
Mishimoto MMCFK-F2D-03BL Coolant Filter Kit Fits Ford 6.0L Powerstroke 2003-2007 Blue
Mishimoto$164.324.6★585 rev
Newest
by launch date
WIKIBB 5/8 Universal Filter Inline Heater Core Coolant Filter Red
WIKIBB$35.675 rev
WIKIBB 1-1/2 Universal Filter Inline Heater Core Coolant Filter Red
WIKIBB$42.994 rev
ZXTQWX Applicable to 24070 Coolant Spin-On Filter
ZXTQWX$10.702 rev
GJYSYP 5/8 in. Inline Coolant Filter Universal Filter and Inspection System Stainless Steel Screen For Pipe Bore 0.62 in.
GJYSYP$38.8239 rev
BANGTE WF2077 Coolant filter with base Compatible with Cummins Engine B6.7 ISL9 Replace Donaldson P554685 Fleetguard WF2077 John Deere RE11992
BANGTE$32.944 rev
Trending
90-day click momentumWIKIBB 5/8 Universal Filter Inline Heater Core Coolant Filter Red
WIKIBB$35.674.8★
WIKIBB 1-1/2 Universal Filter Inline Heater Core Coolant Filter Red
WIKIBB$42.994.2★
ZXTQWX Applicable to 24070 Coolant Spin-On Filter
ZXTQWX$10.704.5★
Mishimoto MMCFK-F2D-03BK Coolant Filter Kit Fits Ford 6.0L Powerstroke 2003-2007 Black
Mishimoto$159.374.6★
Donaldson P554685 Coolant Filter
Donaldson$18.234.6★
What buyers say about coolant filter
What buyers praise and complain about, mined from review topics.What buyers love
“Great filter”
“decent quality”
“works well”
“Easy to install”
“Easy to clean”
“Works as expected”
“Great Value for money”
“But I liked the way it was made”
“Great for aftermarket coolant filtering setup on my 2004 f250”
“No leaks”
What buyers complain about
“it keeps leaking even after I have tightened it up a couple times”
“Not for low pressure systems”
“same thing poor quality fitting”
“The first thing I noticed was how rusty”
“My heater core kept plugging up”
“dirty the cooling system was”
“The kit does not come with instructions”
“Doesnt include a filter”
“Ive had iasues with my heater core clogging so this is inline to my heater core”
“Waste of time and money”
Top return reasons
Common questions
- Is coolant filter profitable to sell on Amazon United States?
- The niche generates $129K/yr across 13 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -36.0%. Flapen's verdict: Skip it (44/100).
- How competitive is the coolant filter niche?
- 8 brands and 82 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 90% of demand.
- What do buyers complain about in coolant filter?
- Top complaints mined from reviews: Leak-Proof, Pressure, Quality-Overall. The return rate is 1.7%.
- What does it cost to enter the coolant filter niche?
- Listings span $10.70–$164.32; the average listing price is $55.86 (sweet spot $15–$100). The average incumbent carries 284 reviews — the moat a new listing must climb.