breather filter
Skip itA small market ($31K/yr) — this niche doesn't clear our bar today.
Returns
Great1.7%return rate — above 6% kills the launch gate
Review moat
Great375.21avg incumbent reviews — the moat a new listing must climb
Brand share
Good64%top-5 brand share — brands hold most of the demand
Competition
Good49%top-5 click share — leaders hold, buyers still browse
Price range
Good$4.60–$27.88cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Okay3.4%search→purchase rate — share of searches ending in a sale
Avg price
Okay$11.02avg listing price — sweet spot $15–$100
Growth
Okay+11.9%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Bad$31K$31K/yr · 84K searches
Competition
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.Brands
18 falling
Sellers
70
Top-5 brand share
64%
Open market
31%
- K&N32%
- RASNONE13%
- 4into17%
- RASNAUTO6%
- Eoppen6%
- ZIMISI5%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 28 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
K&N Vent Air Filter / Breather: Washable and Resuable: 0.375 in/0.5 in (10 mm/13 mm) Flange ID; 1.75 in (44 mm) Height; 2 in (51 mm) Base; 1.5 in (38 mm) Top Red 62-1600RD
K&N$13.134.7★1,699 rev
RASNONE 12mm Air Filter Cold Air Intake Filter Breather Turbo Vent Air Intake Filter Cleaner Black Universal for car and Motorcycle
RASNONE$5.504.6★631 rev
RASNAUTO 2pcs 12mm Air Filter Cold Air Intake Filter Breather Turbo Vent Cleaner Black Universal for Car and Motorcycle
RASNAUTO$7.494.5★220 rev
Eoppen 2Pcs 12mm Air Filter Mini Universal Vent Crankcase Cold Air Intake Breathe Filter for Car and Motorcycle (Black)
Eoppen$9.404.5★48 rev
K&N Vent Air Filter/Breather: High Performance Premium Washable Replacement Engine Filter: Flange Diameter: 0.375 in Filter Height: 1.75 in Flange Length: 0.5 in Shape: Breather 62-1600WT
K&N$11.354.6★264 rev
Newest
by launch date
ZIMISI 0.47/12mm Car Cold Air Intake Filter Round Tapered Car Valve Cover Breather Filter High Flow Automotive Filters Fit for Most Cars Motorcycles (Black)
ZIMISI$4.7635 rev
ZIMISI 0.47/12mm Car Cold Air Intake Filter Round Tapered Car Valve Cover Breather Filter High Flow Automotive Filters Fit for Most Cars Motorcycles (Carbon)
ZIMISI$4.9335 rev
Eoppen 2Pcs 12mm Air Filter Mini Universal Vent Crankcase Cold Air Intake Breathe Filter for Car and Motorcycle (Black)
Eoppen$9.4048 rev
Eoppen 2Pcs 12mm Air Filter Mini Universal Vent Crankcase Cold Air Intake Breathe Filter for Car and Motorcycle (Red)
Eoppen$9.4448 rev
12mm Air Filter Mini - Universal Cold Air Intake Filter Breather Turbo Vent Air Filter For Car and Motorcycle Black Pack of 4
BOMLING$11.2310 rev
Trending
90-day click momentum12mm Air Filter Mini - Universal Cold Air Intake Filter Breather Turbo Vent Air Filter For Car and Motorcycle Black Pack of 4
BOMLING$11.234.6★
BOMLING 12mm Air Filter Mini - Universal Cold Air Intake Filter Breather Turbo Vent Air Filter For Car and Motorcycle Black Pack of 2
BOMLING$6.234.6★
ZIMISI 0.47/12mm Car Cold Air Intake Filter Round Tapered Car Valve Cover Breather Filter High Flow Automotive Filters Fit for Most Cars Motorcycles (Carbon)
ZIMISI$4.934.0★
Uni Filter UP-107 1 Clamp-On Breather
4into1$19.564.8★
Uni Filter UP-102 3/8 Clamp-On Breather
4into1$17.084.6★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +11.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fit well”
“Good quality”
“Great filter”
“Great value”
“No issues for install”
“Just as described”
“does the job”
“looks a lot nicer”
“The foam is easy to clean and re-oil”
“can be mounted almost anywhere”
What buyers complain about
“Broken immediately”
“Small”
“Insanely cheap disappointing”
“why buy more expensive filter”
“much cheaper”
“It broke just trying to install it I would definitely not recommend it”
“battom part its not flat”
“does not fit secondary air filter 2011 gti”
“Did not last a day before the rubber broke”
“Ad is misleading”