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mazda 3 air filter

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A concentrated shelf (top 5 take 77% of clicks) — this niche doesn't clear our bar today.

Market size 20Growth 42Conversion 87Competition 19Returns 96Price range 65Avg price 85Brand share 35Review moat 53Quality gap 19

Returns

Incredible0.9%

return rate — above 6% kills the launch gate

Conversion

Great10.0%

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

Avg price

Great$18.82

avg listing price — sweet spot $15–$100

Price range

Good$7.99–$28.28

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

Review moat

Good1,399.46

avg incumbent reviews — the moat a new listing must climb

Growth

Okay+14.0%

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

Brand share

Okay84%

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

Market size

Bad$81K

$81K/yr · 43K searches

Competition

Bad77%

top-5 click share — a locked-up shelf

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 rising

Sellers

16

Top-5 brand share

84%

Open market

13%

  • EPAuto48%
  • Bosch22%
  • K&N6%
  • RVgolf4%
  • ryvclim3%
  • Capume3%
  • Open — no brand owns it (5 brands, 13%)

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%$24K40%$33K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 13 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +14.0% search growth over the last 90 days.
1K600Spike '25Prime Day '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

Reviews

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

What buyers love

Size-Overall37%

“They fit as advertised”

Value For Money13%

“Worth it”

Quality-Overall12%

“The quality is solid”

Filtration11%

“Great filter”

Assembly/Installation9%

“Easily installed”

Advertised Vs Actual Product5%

“Exactly what I needed”

Ease Of Use3%

“Easy to use”

Maintenance And Repair2%

“Overall, this is a convenient and cost-effective way to handle routine maintenance”

Efficiency1%

“cuts down on fine particles”

Smell1%

“It had no plastic or fiber glass smell like some filters have”

What buyers complain about

Filtration27%

“the engine air filter does NOT”

Compatibility-Overall23%

“Did not fit cx5”

Size-Overall15%

“2 inches too big”

Advertised Vs Actual Product6%

“Misleading description”

Spray/Flow2%

“Not enough air flow”

Width2%

“It is slightly too wide on my 2020 Mazda CX5”

Assembly/Installation2%

“not easy to install”

Thickness2%

“it is about 1/4 too deep”

Ease Of Use1%

“so hard to get out”

Ease Of Cleaning1%

“the old ones were noticeably dirty”

Top return reasons

Size-Overall45%
Compatibility-Overall27%
Filtration12%
Advertised Vs Actual Product6%
Value For Money3%
Defective Material/Parts2%
Assembly/Installation1%
Quality-Overall1%
Width1%
Product Condition1%