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Strong incumbent ratings (4.7★) — this niche doesn't clear our bar today.

Market size 26Growth 27Conversion 97Competition 27Returns 98Price range 80Avg price 87Brand share 22Review moat 99Quality gap 17

Review moat

Incredible25.67

avg incumbent reviews — the moat a new listing must climb

Returns

Incredible0.4%

return rate — above 6% kills the launch gate

Conversion

Incredible14.9%

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

Avg price

Great$66.06

avg listing price — sweet spot $15–$100

Price range

Great$17.15–$118.62

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

Growth

Okay+1.5%

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

Competition

Okay69%

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

Market size

Okay$109K

$109K/yr · 11K searches

Brand share

Bad91%

top-5 brand share — brand-locked demand

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.

Brands

7 falling

Sellers

25

Top-5 brand share

91%

Open market

3%

  • BUYER$ LAIR36%
  • Fleetguard21%
  • MIAOSENXIN13%
  • AULDAY11%
  • FOCUSFILTER10%
  • ATRACYPART6%
  • Open — no brand owns it (1 brand, 3%)

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$11K20%$22K30%$33K40%$44K110100 Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 12 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 62 weeks — +1.5% search growth over the last 90 days.
300200Prime Day '25Spike '25Spike '26MayJunJulAugSepOctNovDecJanFebMarAprMayJun

No pronounced peak months · busiest ÷ quietest = 1.5×

Reviews

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

What buyers love

Filtration30%

“Good filter”

Size-Overall27%

“Perfect fit”

Quality-Overall20%

“Good product”

Fuel Efficiency17%

“Good fuel filter”

Ease Of Use7%

“Super convenient getting 3 at a time”

Top return reasons

Size-Overall42%
Filtration25%
Advertised Vs Actual Product13%
Leak-Proof8%
Compatibility-Overall8%
Fuel Efficiency4%