---
title: "Catalytic Convertor Cleaner — $1.7M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/catalytic-convertor-cleaner"
last_updated: "2026-08-10T19:59:05.783Z"
locale: en
meta:
description: "Niche score 57/100 · $1.7M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · $1.7M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Catalytic Convertor Cleaner — $1.7M/yr Amazon US Niche (2026) - Flapen"
---
# **catalytic convertor cleaner**
**Worth a look**
Shows low returns (0.4%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 90Growth 23Conversion 67Competition 24Returns 98Price range 91Avg price 95Brand share 19Review moat 27Quality gap 72
**Returns**
**Incredible****0.4%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$29.99**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$12.15–$76.77**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Great****$1.7M**
$1.7M/yr · 963K searches
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****6.0%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****3,764.63**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****71%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-4.3%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****93%**
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 ~~](https://flapen.com/research/methodology)
## **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.
23K18KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.2×
[**Open Trend **](https://flapen.com/research/us/automotive/catalytic-convertor-cleaner/trend)
## **Top catalytic convertor cleaner search terms**
- **catalytic convertor cleaner**194K/yr-1.9%5.4% conv. - **cataclean**205K/yr+5.5%7.6% conv. - **catalytic converter cleaner**207K/yr-20.8%4.0% conv. - **cataclean catalytic system cleaner**96K/yr-21.4%7.6% conv. - **catalytic cleaner**62K/yr-28.3%4.1% conv. - **cata clean**29K/yr-8.4%2.8% conv. - **liqui moly catalytic system cleaner**22K/yr-1.3%10.1% conv. - **limpiador de catalizador**21K/yr-8.6%2.2% conv. - **limpiador de catalizador para carro**7K/yr+205.8%3.0% conv. - **mz cata clean catalytic cleaner**5K/yr+295.4%0.2% conv. [**All search terms **](https://flapen.com/research/us/automotive/catalytic-convertor-cleaner/search-terms)
## **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.
0%10%$173K20%$346K30%$519K40%$692K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 19 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.**Liqui Moly**$18.25**4.4★3,736 rev](https://www.amazon.com/dp/B07Z54MBQ3) [2**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**$46.47**4.2★15,538 rev](https://www.amazon.com/dp/B07N7RZ5ZV) [3**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**$27.09**4.2★15,538 rev](https://www.amazon.com/dp/B002BVXM92) [4**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**$29.97**4.2★889 rev](https://www.amazon.com/dp/B0CDFTF8NK) [5**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**$16.91**4.1★1,055 rev](https://www.amazon.com/dp/B07DCYT2F7)
**~~View all top sellers →~~**
### **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**$17.66**11 rev1mo ago](https://www.amazon.com/dp/B0H19Y4NBZ) [**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**$46.87**17 rev3mo ago](https://www.amazon.com/dp/B0GW9D7QTG) [**EZ PASS Emissions Treatment | Catalytic Converter & O2 Sensor Cleaner | Emissions System Support | Smog Test Prep | 16 Fl oz 2-Pack**EZ PASS**$37.06**16 rev4mo ago](https://www.amazon.com/dp/B0GMYBZXMN) [**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**$12.15**103 rev5mo ago](https://www.amazon.com/dp/B0GGR62D24) [**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**$13.79**243 rev10mo ago](https://www.amazon.com/dp/B0FP9DFTH2)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$46.87**4.6★**▲ 247%**](https://www.amazon.com/dp/B0GW9D7QTG) [**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**$17.66**4.8★**▲ 247%**](https://www.amazon.com/dp/B0H19Y4NBZ) [**EZ PASS Emissions Treatment | Catalytic Converter & O2 Sensor Cleaner | Emissions System Support | Smog Test Prep | 16 Fl oz 2-Pack**EZ PASS**$37.06**3.5★**▲ 207%**](https://www.amazon.com/dp/B0GMYBZXMN) [**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**$12.15**4.2★**▲ 149%**](https://www.amazon.com/dp/B0GGR62D24) [**Liqui Moly Jectron Gasoline Fuel Injection Cleaner-2pk**Liqui Moly**$24.02**4.7★**▲ 133%**](https://www.amazon.com/dp/B00LPUO1DQ)
**~~View all trending →~~**
## **What buyers say about catalytic convertor cleaner**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Efficiency**27%
*“Effective”*
**Quality-Overall**14%
*“Quality Car Product”*
**Ease Of Use**9%
*“Ease of use”*
**Fuel Efficiency**9%
*“gets great gas mileage”*
**Ease Of Cleaning**8%
*“Keeps everything clean”*
**Value For Money**7%
*“Great value”*
**Advertised Vs Actual Product**7%
*“exactly as advertised”*
**Functionality-Overall**3%
*“Try it, it may do the job”*
**Instructions/User Manual/Troubleshooting**3%
*“followed instructions exactly”*
**Maintenance And Repair**2%
*“simple enough for routine maintenance use”*
### **What buyers complain about **
**Functionality-Overall**45%
*“No perceived difference in performance”*
**Value For Money**8%
*“It was expensive”*
**Advertised Vs Actual Product**4%
*“Didn't work as advertised”*
**Leak-Proof**4%
*“Damaged and Leaked after the delivered”*
**Compatibility-Overall**3%
*“Didn't work for my on my 17 hyundai accent with 90k on it”*
**Maintenance And Repair**3%
*“won't fix”*
**Sensor**3%
*“upstream right O2 sensor output weak”*
**Durability**3%
*“Light went off for a tank or 2 and then came back on”*
**Fuel Efficiency**2%
*“My gas mileage didn't improve by even a fraction of a mile per gallon”*
**Ease Of Cleaning**2%
*“see no sign at all of any cleaning being done at all”*
### **Top return reasons **
**Leak-Proof**23%
**Functionality-Overall**18%
**Advertised Vs Actual Product**13%
**Value For Money**10%
**Compatibility-Overall**8%
**Defective Material/Parts**6%
**Fuel Efficiency**3%
**Maintenance And Repair**2%
**Product Condition**2%
**Instructions/User Manual/Troubleshooting**2%
## **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.
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