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Soft demand (-52.3% this quarter) — this niche doesn't clear our bar today.

Market size 19Growth 0Conversion 72Competition 41Returns 45Price range 30Avg price 81Brand share 52Review moat 90Quality gap 57

Review moat

Great206.81

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$84.13

avg listing price — sweet spot $15–$100

Conversion

Good6.7%

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

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Brand share

Good74%

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

Returns

Okay3.7%

return rate — above 6% kills the launch gate

Competition

Okay60%

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

Price range

Okay$46.68–$225.49

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

Market size

Bad$78K

$78K/yr · 14K searches

Growth

Bad-52.3%

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

Competition

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

14 rising

Sellers

55

Top-5 brand share

74%

Open market

21%

  • MNJWS21%
  • LOREADA18%
  • Mopar16%
  • Kirogi12%
  • Sumyola8%
  • AUIVERED5%

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%$8K20%$16K30%$23K40%$31K1101001K10K 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 16 tracked products in this niche — three views at once, no toggling.

Demand

Weekly Amazon search volume, last 44 weeks — -52.3% search growth over the last 90 days.
700500Spike '25Black Friday '25Holiday '25Spike '26Sep '25Oct '25Dec '25Feb '26Mar '26May '26

Reviews

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

What buyers love

Quality-Overall22%

“Excellent quality”

Size-Overall14%

“Fit great”

Leak-Proof11%

“Works good and does not leak anymore”

Value For Money8%

“Much cheaper”

Assembly/Installation7%

“The install was very straight forward”

Efficiency4%

“Works perfectly”

Advertised Vs Actual Product4%

“Item like advertised”

Durability3%

“it seems to be built well enough”

Strength2%

“still going strong”

Design-Overall1%

“Hey still the best after market product for a crappy design out there”

What buyers complain about

Leak-Proof23%

“Leaks Oil”

Sensor11%

“Had the wrong sensor one time”

Quality-Overall9%

“Average quality”

Assembly/Installation6%

“unfortunately had to install in recently”

Defective Material/Parts6%

“Item Defective”

Pressure3%

“the it came with the wrong oil pressure sensor”

Lubrication3%

“DO NOT USE PROVIDED GASKETS”

Maintenance And Repair2%

“Terrible repair to perform”

Coolant2%

“Coolant will leak into the oil pan”

Value For Money2%

“I was worried because this was so affordable”

Top return reasons

Leak-Proof22%
Defective Material/Parts13%
Size-Overall13%
Compatibility-Overall9%
Sensor5%
Coolant5%
Filtration5%
Assembly/Installation4%
Value For Money4%
Advertised Vs Actual Product4%