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A small market ($25K/yr) — this niche doesn't clear our bar today.

Market size 6Growth 12Conversion 18Competition 6Returns 57Price range 22Avg price 75Brand share 19Review moat 75Quality gap 52

Review moat

Good512.56

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$99.74

avg listing price — sweet spot $15–$100

Returns

Good2.7%

return rate — above 6% kills the launch gate

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Price range

Bad$51.32–$275.27

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

Brand share

Bad92%

top-5 brand share — brand-locked demand

Conversion

Bad1.5%

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

Growth

Bad-26.7%

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

Market size

Bad$25K

$25K/yr · 17K searches

Competition

Bad92%

top-5 click share — a locked-up shelf

Competition

The top 5 products capture 92% of clicks — a locked-up shelf that new listings rarely crack.

Brands

9 falling

Sellers

57

Top-5 brand share

92%

Open market

8%

  • LEMASSON33%
  • Dorman30%
  • YITHSWAY13%
  • BELKEBIR9%
  • Mishimoto4%
  • WZUMLAP4%
  • Open — no brand owns it (3 brands, 8%)

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%$2K20%$5K30%$7K40%$10K1001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 9 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -26.7% search growth over the last 90 days.
450350Spike '24Holiday '24Spike '25Prime Day '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Mar, Apr · busiest ÷ quietest = 2.8×

Reviews

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

What buyers love

Quality-Overall23%

“Perfect flawless quality unit for compatable vehicle”

Size-Overall14%

“Everything fit perfectly”

Value For Money12%

“Much cheaper”

Leak-Proof9%

“so far it has not leaked at all”

Efficiency6%

“Works perfectly”

Assembly/Installation6%

“The install was very straight forward”

Advertised Vs Actual Product5%

“As advertised”

Coolant3%

“Great quality, my truck has been loving the fact it's not leaking oil and coolant anymore”

Durability3%

“it seems to be built well enough”

Maintenance And Repair3%

“Great replacement part”

What buyers complain about

Leak-Proof25%

“Leaking again”

Sensor10%

“Sensor does not fit”

Quality-Overall10%

“the second one looks like it never seen quality control”

Defective Material/Parts6%

“Item Defective”

Assembly/Installation5%

“unfortunately had to install in recently”

Value For Money3%

“Cost me an additional $300 because I had to take the van to the shop”

Durability3%

“After a week of use it broke again”

Size-Overall2%

“Didn't fit”

Lubrication2%

“DO NOT USE PROVIDED GASKETS”

Maintenance And Repair2%

“Terrible repair to perform”

Top return reasons

Leak-Proof22%
Defective Material/Parts14%
Size-Overall11%
Coolant9%
Compatibility-Overall6%
Filtration5%
Sensor5%
Value For Money4%
Quality-Overall3%
Functionality-Overall3%