Is r12t fuel filter profitable to sell on Amazon United States?

The niche generates $16K/yr across 16 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +76.7%. Flapen's verdict: Worth a look (50/100).

How competitive is the r12t fuel filter niche?

10 brands and 12 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 88% of demand.

What do buyers complain about in r12t fuel filter?

Top complaints mined from reviews: Leak-Proof, Filtration, Size-Overall. The return rate is 1.4%.

What does it cost to enter the r12t fuel filter niche?

Listings span $12.47–$50.00; the average listing price is $21.74 (sweet spot $15–$100). The average incumbent carries 212 reviews — the moat a new listing must climb.

r12t fuel filter

Worth a look

Shows a sweet-spot price point ($21.74 avg), but a small market ($16K/yr) keeps it on the watch list.

Avg price

Great$21.74

avg listing price — sweet spot $15–$100

Price range

Great$12.47–$50.00

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

Review moat

Great211.94

avg incumbent reviews — the moat a new listing must climb

Returns

Great1.4%

return rate — above 5% kills the launch gate

Growth

Great+76.7%

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

Conversion

Good5.0%

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

Brand share

Okay88%

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

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Competition

Bad75%

top-5 click share — a locked-up shelf

Market size

Bad$16K

$16K/yr · 15K searches

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, r12t fuel filter is a $16K/yr Amazon United States market (15K searches/yr). The top 5 brands hold 88% of demand. Verdict: Worth a look — 50/100.

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

r12t fuel filter market data

Units sold / yr: 2K–3K; avg 100–250/product
Revenue / yr: $43K–$54K; units × avg price
Conversion rate: 5.0%
Avg BSR: #470
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 5.1%
Avg brand age: 52 months
Avg seller age: 211 days

Competition & brand share

The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.

Brands

10 falling

Sellers

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

75%

Top 20: 100%

Open market

TRSCJXN38%
DZFST.FI19%
CARMOCAR19%
AUIVERED7%
AULDAY5%
Hoypeyfiy4%
Open — no brand owns it (4 brands, 8%)

Demand

Weekly Amazon search volume, last 9 weeks — +76.7% search growth over the last 90 days.

Open Trend

Top r12t fuel filter search terms

r12t fuel filter9K/yr +50.0%8.1% conv.
r12t fuel filter/water separator3K/yr +359.3%11.7% conv.
r12t3K/yr +22.0%10.0% conv.

All search terms

Top r12t 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 16 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

R12T Marine Fuel Water Separator Filter Kit 10 Micron Replacement for S3240 120AT 18-7987 NPT ZG1/4-19 Fits Gasoline and Diesel Outboard Engines Includes 2 Fittings and 2 Plugs

TRSCJXN$18.554.6★55 rev

DZFST.FI R12T Fuel Filter Water Separator Spin-on R12T Filter with Water Collection Bowl Diesel Engine & Gasoline Engine Replaces# S3240 R12T 120AT 18-7987 NPT ZG1/4-19

DZFST.FI$16.974.6★70 rev

R12T Fuel Filter Water Separator with Clear Nylon Collection Bowl 3/8 Inch NPT Spin-on Assembly Replaces S3240 120AT 18-7947 18-7987 NPT ZG1/4-19

TRSCJXN$14.305.0★4 rev

CARMOCAR Marine Fuel Water Separator Element of R12T Water Separator 120AT NPT ZG1/4-19 for Marine Engine S3240 120AT 18-7947 35-60494-1

CARMOCAR$12.474.7★35 rev

CARMOCAR Marine Fuel Water Separator/Diesel Fuel Filter/Water Separator for R12T MARINE SPIN-ON HOUSING 120AT NPT ZG1/4-19 Includes 2 fittings 2 plugs

CARMOCAR$21.774.3★337 rev

Newest

by launch date

R12T Fuel Filter Water Separator with Clear Nylon Collection Bowl 3/8 Inch NPT Spin-on Assembly Replaces S3240 120AT 18-7947 18-7987 NPT ZG1/4-19

TRSCJXN$14.304 rev

4w ago

R12T Marine Fuel Water Separator Filter Kit 10 Micron Replacement for S3240 120AT 18-7987 NPT ZG1/4-19 Fits Gasoline and Diesel Outboard Engines Includes 2 Fittings and 2 Plugs

TRSCJXN$18.5555 rev

8mo ago

AUIVERED R12T Fuel Filter Water Separator Element - 120AT NPT ZG1/4-19 Automotive Part Fits Marine Diesel Engine - Replaces S3240 18-7947

AUIVERED$12.7616 rev

9mo ago

AUIVERED R12T Fuel Filter Water Separator with Collection Bowl- Replaces# S3240 R12T 120AT 18-7987 NPT ZG1/4-19 Automotive Parts with Fitting

AUIVERED$16.0518 rev

1y ago

4PCS R12T Fuel Filter Water Separator With Water Collection Bowl Fits for Diesel Engine & Gasoline Engine Replaces# S3240 R12T 120AT 18-7987 NPT ZG1/4-19

AULDAY$39.717 rev

1y ago

What buyers say about r12t fuel filter

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

What buyers love

Filtration17%

“Great fuel filter”

Quality-Overall17%

“construction over all is very good”

Value For Money13%

“Definitely worth the money”

Assembly/Installation12%

“Installation was straightforward”

Size-Overall10%

“fits perfectly”

Maintenance And Repair3%

“It made a good modification for my BX 25d Kubota tractor”

Leak-Proof3%

“This filter doesn't leak”

Fuel Efficiency2%

“Great quality fuel/water separator”

Durability2%

“Its very durable and zero issues”

Advertised Vs Actual Product2%

“As advertised”

What buyers complain about

Leak-Proof20%

“The clear bowl on the bottom of the filter continually leaked fuel”

Filtration16%

“Tried everything to get it undone with breaking it and nothing worked, which means when it's time to change out the filter, both the filter and the catch bowl assembly will have to be repurchased”

Size-Overall10%

“MISSING FITTINGS”

Material Quality7%

“Not reliable plastic”

Durability6%

“7 of them broke trying to affix a fuel hose to a gas tank”

Instructions/User Manual/Troubleshooting3%

“WHY NO INSTRUCTIONS AS TO HOW TO USE”

Quality-Overall2%

“Three are cheap trash”

Pressure2%

“they tension gear breaks at the least amount of pressure you apply”

Fuel Efficiency1%

“Bad fuel is a fuel injection systems worst enemy”

Maintenance And Repair1%

“time consuming to repair”

Top return reasons

Size-Overall57%

Filtration9%

Leak-Proof9%

Compatibility-Overall8%

Quality-Overall5%

Functionality-Overall3%

Defective Material/Parts2%

Mounting2%

Ease Of Use1%

Assembly/Installation1%

Common questions

Is r12t fuel filter profitable to sell on Amazon United States?: The niche generates $16K/yr across 16 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +76.7%. Flapen's verdict: Worth a look (50/100).
How competitive is the r12t fuel filter niche?: 10 brands and 12 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 88% of demand.
What do buyers complain about in r12t fuel filter?: Top complaints mined from reviews: Leak-Proof, Filtration, Size-Overall. The return rate is 1.4%.
What does it cost to enter the r12t fuel filter niche?: Listings span $12.47–$50.00; the average listing price is $21.74 (sweet spot $15–$100). The average incumbent carries 212 reviews — the moat a new listing must climb.