---
title: "Coolant Test Strips — $240K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/coolant-test-strips"
last_updated: "2026-08-10T16:33:20.530Z"
locale: en
meta:
description: "Niche score 55/100 · $240K/yr market · 97K searches/yr. A concentrated shelf (top 5 take 78% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $240K/yr market · 97K searches/yr. A concentrated shelf (top 5 take 78% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Coolant Test Strips — $240K/yr Amazon US Niche (2026) - Flapen"
---
# **coolant test strips**
**Worth a look**
Shows a sweet-spot price point ($29.81 avg), but a concentrated shelf (top 5 take 78% of clicks) keeps it on the watch list.
Market size 45Growth 43Conversion 80Competition 18Returns 90Price range 85Avg price 95Brand share 28Review moat 74Quality gap 68
**Avg price**
**Incredible****$29.81**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.3%**
return rate — above 5% kills the launch gate
**Price range**
**Great****$6.03–$77.60**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****8.3%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****531.7**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$240K**
$240K/yr · 97K searches
**Growth**
**Okay****+14.6%**
90-day search growth — must beat 0% to launch
**Brand share**
**Okay****88%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, coolant test strips is a $240K/yr Amazon United States market (97K searches/yr). The top 5 brands hold 88% of demand. Verdict: Worth a look — 55/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **coolant test strips market data**
- **Units sold / yr**
- **8K–10K**
- avg 750–1,000/product
- **Revenue / yr**
- **$238K–$298K**
- units × avg price
- **Conversion rate**
- **8.3%**
- **Avg BSR**
- **#70**
- **Page quality**
- **0%**
- **Prime**
- **90%**
- **Sponsored**
- **80%**
- **Out of stock**
- **5.4%**
- **Avg brand age**
- **55 months**
- **Avg seller age**
- **171 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▲rising
**Sellers**
**39**
**Top-5 brand share**
**88%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**7%**
- Phoenix Systems60% - Robinair10% - Aicevoos9% - ecocstm5% - Baldwin Filters5% - Wix5% - Open — no brand owns it (2 brands, 7%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +14.6% search growth over the last 90 days.
2K1KPrime Day '24Spike '24Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/automotive/coolant-test-strips/trend)
## **Top coolant test strips search terms**
- **coolant test strips**39K/yr+17.7%6.4% conv. - **brake fluid test strips**33K/yr+7.6%6.2% conv. - **antifreeze test strips**8K/yr-0.5%4.6% conv. - **coolant test strips for antifreeze**3K/yr+70.9%7.2% conv. - **coolant ph test strips**3K/yr+86.5%5.4% conv. - **ford diesel coolant additive test kit**4K/yr-7.7%2.1% conv. - **brake fluid tester strips**5K/yr+14.4%5.2% conv. - **coolant and brake fluid test strips**3K/yr+12.4%8.9% conv. [**All search terms **](https://flapen.com/research/us/automotive/coolant-test-strips/search-terms)
## **Top coolant test strips 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%15%$36K30%$72K45%$108K60%$144K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Phoenix Systems 8006-B Double-Ended Brake Fluid + Coolant Test Strips (15 foil wrapped test strips) 1 Pack**Phoenix Systems**$16.37**4.6★1,383 rev](https://www.amazon.com/dp/B0753MZT7P) [2**Robinair 75134 Econo-Clean Coolant Test Strip - Use to Test and Adjust Coolant for Proper Protection; Compatible with all Ethylene Glycol and Propylene Glycol Coolants - 50 Piece**Robinair**$36.95**4.2★121 rev](https://www.amazon.com/dp/B000I1CAOK) [3**Aicevoos NF Brake Fluid Tester Pen Brake Fluid Test Strips Calibrated for DOT3 DOT4 DOT-5.1 Brake Fluid**Aicevoos**$12.97**4.5★1,213 rev](https://www.amazon.com/dp/B0C1SFRRGB) [4**Antifreeze Coolant Tester Coolant Test Strips C and F Display Dial Type Antifreeze Tester Automotive 6/12/24V Car Battery Liquid Densitometer for Ethylene Glycol Coolant**ecocstm**$7.50**4.7★27 rev](https://www.amazon.com/dp/B0DZ6RYCRM) [5**BrakeStrip Plus Service Center Kit. Double Ended Brake Fluid Plus Coolant Test Strips and Rating Scale Cards**Phoenix Systems**$77.60**4.6★31 rev](https://www.amazon.com/dp/B0B3M4DDFR)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Antifreeze Coolant Tester Coolant Test Strips C and F Display Dial Type Antifreeze Tester Automotive 6/12/24V Car Battery Liquid Densitometer for Ethylene Glycol Coolant**ecocstm**$7.50**27 rev1y ago](https://www.amazon.com/dp/B0DZ6RYCRM) [**Brake Fluid Liquid Tester Pen 1PC DOT 3 DOT 4 DOT 5.1 Brake Fluid Liquid Tester Pen Car Diagnostic Testing Tool with 5 LED Indicators Hydraulic Fluid Liquid Oil Moisture Analyzer**YOGEIER**$6.03**1,235 rev3y ago](https://www.amazon.com/dp/B0C53278WB) [**Aicevoos NF Brake Fluid Tester Pen Brake Fluid Test Strips Calibrated for DOT3 DOT4 DOT-5.1 Brake Fluid**Aicevoos**$12.97**1,213 rev3y ago](https://www.amazon.com/dp/B0C1SFRRGB) [**BrakeStrip Plus Service Center Kit. Double Ended Brake Fluid Plus Coolant Test Strips and Rating Scale Cards**Phoenix Systems**$77.60**31 rev4y ago](https://www.amazon.com/dp/B0B3M4DDFR) [**Phoenix Systems 8006-B Double-Ended Brake Fluid + Coolant Test Strips (15 foil wrapped test strips) 1 Pack**Phoenix Systems**$16.37**1,383 rev8y ago](https://www.amazon.com/dp/B0753MZT7P)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Antifreeze Coolant Tester Coolant Test Strips C and F Display Dial Type Antifreeze Tester Automotive 6/12/24V Car Battery Liquid Densitometer for Ethylene Glycol Coolant**ecocstm**$7.50**4.7★**▲ 131%**](https://www.amazon.com/dp/B0DZ6RYCRM) [**Robinair 75134 Econo-Clean Coolant Test Strip - Use to Test and Adjust Coolant for Proper Protection; Compatible with all Ethylene Glycol and Propylene Glycol Coolants - 50 Piece**Robinair**$36.95**4.2★**▲ 53%**](https://www.amazon.com/dp/B000I1CAOK) [**WIX Filters - 24106 Coolant Test Kit Pack of 1**Wix**$40.55**4.4★**▲ 32%**](https://www.amazon.com/dp/B0016O9LUE) [**Fleetguard Coolant Analysis Test Kit CC2602A**Fleetguard**$19.82**4.1★**▲ 24%**](https://www.amazon.com/dp/B002TQD2KI) [**Phoenix Systems (3001-B) Brake Fluid Test Strips 100 Test Strips Per Tube BrakeStrip FASCAR Copper White**Phoenix Systems**$62.45**4.5★**▲ 19%**](https://www.amazon.com/dp/B000JFJMGO)
**~~View all trending →~~**
## **What buyers say about coolant test strips**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**24%
*“Easy to use”*
**Value For Money**16%
*“Worth on money”*
**Efficiency**13%
*“Works Well”*
**Quality-Overall**10%
*“Good quality”*
**Coolant**6%
*“coolant these are a must have”*
**Advertised Vs Actual Product**6%
*“Works just as described”*
**Maintenance And Repair**4%
*“Great way to extend the Maintenance Interval on my Tesla Model Y”*
**Durability**3%
*“Good for a few uses before it breaks apart”*
**Measurement/Reading Accuracy**3%
*“Way better and more accurate than floating gauges for coolant”*
**Battery Life**2%
*“Battery was easy to install”*
### **What buyers complain about **
**Durability**28%
*“Broke after first use”*
**Quality-Overall**12%
*“Garbage”*
**Value For Money**7%
*“Also a bit expensive”*
**Measurement/Reading Accuracy**7%
*“And the accuracy is unreliable”*
**Instructions/User Manual/Troubleshooting**5%
*“The instructions are beyond confusing”*
**Material Quality**5%
*“Cheap plastic”*
**Size-Overall**4%
*“Probe End Too Wide to Fit”*
**Ease Of Use**3%
*“It doesnt get much easier to use”*
**Sensor**3%
*“Sensors does not work properly”*
**Color**2%
*“it still shows a bit of color change”*
### **Top return reasons **
**Functionality-Overall**16%
**Measurement/Reading Accuracy**15%
**Coolant**12%
**Defective Material/Parts**9%
**Advertised Vs Actual Product**9%
**Value For Money**7%
**Durability**5%
**Compatibility-Overall**4%
**Size-Overall**3%
**Display-Overall**2%
## **Common questions**
- **Is coolant test strips profitable to sell on Amazon United States?**
- The niche generates $240K/yr across 10 tracked products. 90-day search growth is +14.6%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the coolant test strips niche?**
- 8 brands and 39 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 88% of demand.
- **What do buyers complain about in coolant test strips?**
- Top complaints mined from reviews: Durability, Quality-Overall, Value For Money. The return rate is 1.3%.
- **When does demand for coolant test strips peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the coolant test strips niche?**
- Listings span $6.03–$77.60; the average listing price is $29.81 (sweet spot $15–$100). The average incumbent carries 532 reviews — the moat a new listing must climb.
## **Related niches in Automotive**
- 72 [**brake bleeder kit**](https://flapen.com/research/us/automotive/brake-bleeder-kit)$2.2M/yr+8.2%**Launch it**- 72 [**gas can pump**](https://flapen.com/research/us/automotive/gas-can-pump)$1.7M/yr+20.1%**Launch it**- 72 [**dewalt hedge trimmer**](https://flapen.com/research/us/automotive/dewalt-hedge-trimmer)$1.6M/yr+158.2%**Launch it**- 72 [**iron eraser**](https://flapen.com/research/us/automotive/iron-eraser)$107K/yr>1,000%**Worth a look**- 72 [**marine fuel line**](https://flapen.com/research/us/automotive/marine-fuel-line)$198K/yr+104.3%**Worth a look**- 72 [**garden hose filter**](https://flapen.com/research/us/automotive/garden-hose-filter)$729K/yr+110.7%**Worth a look**[**All Automotive niches **](https://flapen.com/research/us/automotive)