catalytic convertor cleaner
Worth a lookShows low returns (0.4%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Avg price
Incredible$29.99avg listing price — sweet spot $15–$100
Price range
Great$12.15–$76.77cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Great$1.7M$1.7M/yr · 963K searches
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Conversion
Good6.0%search→purchase rate — share of searches ending in a sale
Review moat
Okay3,764.63avg incumbent reviews — the moat a new listing must climb
Competition
Bad71%top-5 click share — a locked-up shelf
Growth
Bad-4.3%90-day search growth — must beat 0% to launch
Brand share
Bad93%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, catalytic convertor cleaner is a $1.7M/yr Amazon United States market (963K searches/yr). The top 5 brands hold 93% of demand. Verdict: Worth a look — 57/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
catalytic convertor cleaner market data
- Units sold / yr
- 60K–80K
- avg 3,000–4,000/product
- Revenue / yr
- $1.8M–$2.4M
- units × avg price
- Conversion rate
- 6.0%
- Avg BSR
- #30
- Page quality
- 0%
- Prime
- 95%
- Sponsored
- 79%
- Out of stock
- 4.1%
- Avg brand age
- 73 months
- Avg seller age
- 145 days
Competition & brand share
The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
88
Top-5 brand share
93%
Top 20: 100%
Top-5 click share
71%
Top 20: 100%
Open market
6%
- Cataclean44%
- Liqui Moly26%
- MotorPower Care14%
- DURA LUBE6%
- Ciirvoe3%
- EZ PASS2%
- Open — no brand owns it (4 brands, 6%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -4.3% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top catalytic convertor cleaner search terms
- catalytic convertor cleaner194K/yr
- cataclean205K/yr
- catalytic converter cleaner207K/yr
- cataclean catalytic system cleaner96K/yr
- catalytic cleaner62K/yr
- cata clean29K/yr
- liqui moly catalytic system cleaner22K/yr
- limpiador de catalizador21K/yr
- limpiador de catalizador para carro7K/yr
- mz cata clean catalytic cleaner5K/yr
Top catalytic convertor cleaner products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 19 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.
Liqui Moly$18.254.4★3,736 rev
Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz - Pack of 2 (120019)
Cataclean$46.474.2★15,538 rev
Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz (120007)
Cataclean$27.094.2★15,538 rev
MotorPower Care Catalytic Converter Cleaner 2-Pack Pass Smog & Emissions Test Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive 8.45 fl oz Each
MotorPower Care$29.974.2★889 rev
MotorPower Care Catalytic Converter Cleaner Pass Emissions Test & Fix P0420 | Cleans O2 Sensor EGR Valve & Exhaust System | Fuel Additive for Gas & Hybrid Engines 8.45 fl oz
MotorPower Care$16.914.1★1,055 rev
Newest
by launch date
Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car Upgraded Solid Particles
WhyBox$17.6611 rev
Cataclean Diesel Cleans Diesel Particulate Filters (DPF) Injectors Turbochargers EGR Valves & Exhaust Systems Reduces Soot Ash & Carbon Build-Up Improves MPG Power & Emissions 16oz (2 Pack)
Cataclean$46.8717 rev
EZ PASS Emissions Treatment | Catalytic Converter & O2 Sensor Cleaner | Emissions System Support | Smog Test Prep | 16 Fl oz 2-Pack
EZ PASS$37.0616 rev
Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive
Ciirvoe$12.15103 rev
Timeno 3Pcs Catalytic Converter Cleaner Boost Up Catalytic Convertor Cleaner Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car
Timeno$13.79243 rev
Trending
90-day click momentumCataclean Diesel Cleans Diesel Particulate Filters (DPF) Injectors Turbochargers EGR Valves & Exhaust Systems Reduces Soot Ash & Carbon Build-Up Improves MPG Power & Emissions 16oz (2 Pack)
Cataclean$46.874.6★
Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car Upgraded Solid Particles
WhyBox$17.664.8★
EZ PASS Emissions Treatment | Catalytic Converter & O2 Sensor Cleaner | Emissions System Support | Smog Test Prep | 16 Fl oz 2-Pack
EZ PASS$37.063.5★
Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive
Ciirvoe$12.154.2★
Liqui Moly Jectron Gasoline Fuel Injection Cleaner-2pk
Liqui Moly$24.024.7★
What buyers say about catalytic convertor cleaner
What buyers praise and complain about, mined from review topics.What buyers love
“Effective”
“Quality Car Product”
“Ease of use”
“gets great gas mileage”
“Keeps everything clean”
“Great value”
“exactly as advertised”
“Try it, it may do the job”
“followed instructions exactly”
“simple enough for routine maintenance use”
What buyers complain about
“No perceived difference in performance”
“It was expensive”
“Didn't work as advertised”
“Damaged and Leaked after the delivered”
“Didn't work for my on my 17 hyundai accent with 90k on it”
“won't fix”
“upstream right O2 sensor output weak”
“Light went off for a tank or 2 and then came back on”
“My gas mileage didn't improve by even a fraction of a mile per gallon”
“see no sign at all of any cleaning being done at all”
Top return reasons
Common questions
- Is catalytic convertor cleaner profitable to sell on Amazon United States?
- The niche generates $1.7M/yr across 19 tracked products. 4 of 5 products launched in the last 360 days are still selling. 90-day search growth is -4.3%. Flapen's verdict: Worth a look (57/100).
- How competitive is the catalytic convertor cleaner niche?
- 10 brands and 88 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 93% of demand.
- What do buyers complain about in catalytic convertor cleaner?
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Advertised Vs Actual Product. The return rate is 0.4%.
- When does demand for catalytic convertor cleaner peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the catalytic convertor cleaner niche?
- Listings span $12.15–$76.77; the average listing price is $29.99 (sweet spot $15–$100). The average incumbent carries 3,765 reviews — the moat a new listing must climb.