Is 3/8 fuel filter profitable to sell on Amazon United States?

The niche generates $145K/yr across 26 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is +36.9%. Flapen's verdict: Worth a look (64/100).

How competitive is the 3/8 fuel filter niche?

22 brands and 53 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 63% of demand.

What do buyers complain about in 3/8 fuel filter?

Top complaints mined from reviews: Filtration, Quality-Overall, Durability. The return rate is 1.6%.

When does demand for 3/8 fuel filter peak?

Demand peaks in May; the busiest month runs 1.9× the quietest.

What does it cost to enter the 3/8 fuel filter niche?

Listings span $6.28–$45.35; the average listing price is $15.01 (sweet spot $15–$100). The average incumbent carries 426 reviews — the moat a new listing must climb.

3/8 fuel filter

Worth a look

Shows searches that convert (10.0% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Conversion

Great10.0%

search→purchase rate — share of searches ending in a sale

Returns

Great1.6%

return rate — above 5% kills the launch gate

Review moat

Great425.77

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Price range

Great$6.28–$45.35

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Great$15.01

avg listing price — sweet spot $15–$100

Brand share

Good63%

top-5 brand share — brands hold most of the demand

Growth

Good+36.9%

90-day search growth — must beat 0% to launch

Competition

Okay57%

top-5 click share — leaders hold, buyers still browse

Market size

Okay$145K

$145K/yr · 96K searches

According to Flapen's Amazon United States niche tracking, 3/8 fuel filter is a $145K/yr Amazon United States market (96K searches/yr). The top 5 brands hold 63% of demand. Demand peaks in May. Verdict: Worth a look — 64/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

3/8 fuel filter market data

Units sold / yr: 10K–13K; avg 250–500/product
Revenue / yr: $150K–$188K; units × avg price
Conversion rate: 10.0%
Avg BSR: #411
Page quality: 0%
Prime: 100%
Sponsored: 81%
Out of stock: 0.0%
Avg brand age: 49 months
Avg seller age: 180 days

Competition & brand share

The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.

Brands

22 rising

Sellers

Top-5 brand share

63%

Top 20: 98%

Top-5 click share

57%

Top 20: 94%

Open market

32%

Wix27%
Deflife12%
The Revenant12%
K&N7%
Riyhch5%
EVIL ENERGY5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +36.9% search growth over the last 90 days.

Peak months: May · busiest ÷ quietest = 1.9×

Open Trend

Top 3/8 fuel filter search terms

3/8 fuel filter45K/yr +27.0%10.8% conv.
3/8 inline fuel filter18K/yr +47.4%10.5% conv.
in line fuel filter 3/812K/yr +79.0%9.2% conv.
inline fuel filter 3/89K/yr +35.9%10.0% conv.
fuel filter 3/85K/yr +41.5%10.2% conv.
3/8 fuel filter inline4K/yr +22.2%11.9% conv.
3/8 in line fuel filter3K/yr +18.6%14.1% conv.

All search terms

Top 3/8 fuel 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

WIX Racing Filters Fuel Filter

Wix$6.284.7★1,244 rev

WIX 33033 Universal In-Line Fuel Filter with 3/8 Clamp-On Inlet/Outlet Max Pressure 60-PSI

Wix$7.314.8★1,477 rev

FUEL FILTERS INDUSTRIAL HIGH PERFORMANCE UNIVERSAL INLINE GAS FUEL LINE 3/8 2 Pack

Deflife$9.514.5★225 rev

Universal Replacement Gas Inline Fuel Filters for Motorcycles Cars Trucks And Gasoline Powered Engines 3/8 Inch (Pack of 4)

The Revenant$9.874.4★1,402 rev

K&N 81-0300 Replacement Fuel Filter

K&N$9.214.5★3,954 rev

Newest

by launch date

3/8Inch (10MM) ID Fuel Line kits 5Pcs Gas Inline Fuel Filter Fits 3/8inch Fuel Line Universal 3/8 Clear Fuel Filter for Motorcycles ATV Lawn Mowers Small Tractors Garden Tillers

JinRui-T$12.478 rev

5mo ago

3/8Inch (10MM) ID Fuel Line kits 6Ft Fuel Line&2Pcs Gas Inline Fuel Filter Fits 3/8inch&4 Pcs Mini Adjustable Fuel Hose Clamps for Motorcycles ATV Lawn Mowers Small Tractors Garden Tillers

JinRui-T$15.579 rev

5mo ago

CNRAQR 3/8Fuel Filters 178 Micron Removable Black Anodized Aluminum

CNRAQR$10.1799 rev

8mo ago

JAVOUKA 10 Pack Fuel Filter 3/8 Universal Inline Gas Fuel Filters Fit for Cars Motorcycles Industrial Tractors Trucks RVs Gas Powered Engine

JAVOUKA$19.2516 rev

11mo ago

BESULEN 3/8 Inch Gas Inline Fuel Filters 4PCS Vehicle Gasoline Powered Engines Fuel Filters Replacement Automotive Engines Accessories Universal for Motorcycles Cars Trucks

BESULEN$7.5617 rev

11mo ago

What buyers say about 3/8 fuel filter

What buyers praise and complain about, mined from review topics.

What buyers love

Filtration23%

“Nice filters for the price”

Quality-Overall19%

“Good quality”

Value For Money10%

“Worth the money”

Advertised Vs Actual Product9%

“Works as advertised”

Size-Overall9%

“Fit well”

Fuel Efficiency7%

“Fuel flow seems adequate”

Assembly/Installation4%

“Easy install”

Leak-Proof2%

“Didnt leak,”

Efficiency2%

“Good functioning”

Design-Overall2%

“Nicely constructed”

What buyers complain about

Filtration18%

“In turn there is zero filtration”

Quality-Overall11%

“Quality control is lacking”

Durability11%

“Falling apart”

Size-Overall10%

“sent clamps that were to small”

Leak-Proof10%

“they leak”

Fuel Efficiency8%

“Make sure you double check your measurements this is a tiny fuel filter not for my motorhome”

Advertised Vs Actual Product3%

“Absolutely NOT as advertised”

Rusts/Corrodes2%

“Caught rust”

Rubber Quality2%

“Maybe the quality of rubber was low”

Pressure1%

“so I don't know how bad the pressure side would have leaked at 6 psi”

Top return reasons

Size-Overall70%

Filtration10%

Compatibility-Overall6%

Advertised Vs Actual Product3%

Leak-Proof2%

Functionality-Overall1%

Assembly/Installation1%

Fuel Efficiency1%

Defective Material/Parts1%

Material Quality1%

Common questions

Is 3/8 fuel filter profitable to sell on Amazon United States?: The niche generates $145K/yr across 26 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is +36.9%. Flapen's verdict: Worth a look (64/100).
How competitive is the 3/8 fuel filter niche?: 22 brands and 53 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 63% of demand.
What do buyers complain about in 3/8 fuel filter?: Top complaints mined from reviews: Filtration, Quality-Overall, Durability. The return rate is 1.6%.
When does demand for 3/8 fuel filter peak?: Demand peaks in May; the busiest month runs 1.9× the quietest.
What does it cost to enter the 3/8 fuel filter niche?: Listings span $6.28–$45.35; the average listing price is $15.01 (sweet spot $15–$100). The average incumbent carries 426 reviews — the moat a new listing must climb.