---
title: "Coolant Vacuum Refill Kit — $461K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/coolant-vacuum-refill-kit"
last_updated: "2026-08-10T18:14:13.431Z"
locale: en
meta:
description: "Niche score 50/100 · $461K/yr market · 528K searches/yr · $50.72 avg price. Soft demand (-21.0% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $461K/yr market · 528K searches/yr · $50.72 avg price. Soft demand (-21.0% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Coolant Vacuum Refill Kit — $461K/yr Amazon US Niche (2026) - Flapen"
---
# **coolant vacuum refill kit**
**Worth a look**
Shows a sweet-spot price point ($50.72 avg), but soft demand (-21.0% this quarter) keeps it on the watch list.
Market size 58Growth 14Conversion 22Competition 65Returns 45Price range 63Avg price 93Brand share 51Review moat 56Quality gap 67
**Avg price**
**Great****$50.72**
avg listing price — sweet spot $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****46%**
top-5 click share — leaders hold, buyers still browse
**Price range**
**Good****$14.81–$150.45**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$461K**
$461K/yr · 528K searches
**Review moat**
**Good****1,264.41**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****75%**
top-5 brand share — brands hold most of the demand
**Returns**
**Okay****3.4%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****1.7%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-21.0%**
90-day search growth — must beat 0% to launch
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, coolant vacuum refill kit is a $461K/yr Amazon United States market (528K searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Jul. Verdict: Worth a look — 50/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **coolant vacuum refill kit market data**
- **Units sold / yr**
- **8K–10K**
- avg 100–250/product
- **Revenue / yr**
- **$406K–$507K**
- units × avg price
- **Conversion rate**
- **1.7%**
- **Avg BSR**
- **#75**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **97%**
- **Out of stock**
- **5.0%**
- **Avg brand age**
- **55 months**
- **Avg seller age**
- **151 days**
## **Competition & brand share**
The top 5 products take 46% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▼falling
**Sellers**
**64**
**Top-5 brand share**
**75%**
Top 20: 100%
**Top-5 click share**
**46%**
Top 20: 87%
**Open market**
**20%**
- Orion Motor Tech33% - OEMTOOLS25% - UView6% - BILITOOLS6% - CXPRO5% - DAYUAN5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -21.0% search growth over the last 90 days.
9K7KPrime Day '24Holiday '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jul · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/automotive/coolant-vacuum-refill-kit/trend)
## **Top coolant vacuum refill kit search terms**
- **oem tools**215K/yr-23.9%0.2% conv. - **coolant vacuum refill kit**108K/yr-18.1%3.1% conv. - **oemtools**34K/yr-3.3%0.2% conv. - **oem**29K/yr-7.9%0.0% conv. - **vacuum coolant fill kit**22K/yr-19.7%3.4% conv. - **coolant vacuum filler**9K/yr-1.5%3.1% conv. - **coolant refill kit**13K/yr-18.7%2.7% conv. - **cooling system vacuum fill tool**16K/yr-37.9%3.2% conv. - **radiator vacuum fill kit**12K/yr-17.2%3.9% conv. - **airlift coolant refill tool**9K/yr-13.3%4.2% conv. [**All search terms **](https://flapen.com/research/us/automotive/coolant-vacuum-refill-kit/search-terms)
## **Top coolant vacuum refill kit 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%4%$18K8%$37K12%$55K16%$74K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**OEMTOOLS Coolant Vacuum Refill Kit Coolant Pressure Tester Kit 5 Adapter**OEMTOOLS**$93.11**4.4★2,361 rev](https://www.amazon.com/dp/B01BW39HJS) [2**Orion Motor Tech Coolant Vacuum Refill Kit 13pc Radiator Cooling System Tool Set with Conical Adapter 4 Round Adapters for Leak Detection Cooling Refill Vacuum Coolant Fill Kit with Hose Black**Orion Motor Tech**$45.62**4.3★85 rev](https://www.amazon.com/dp/B0G7TGZCR3) [3**Orion Motor Tech Coolant Vacuum Refill Kit 13pc Radiator Cooling System Tool Set with Conical Adapter 4 Round Adapters for Leak Detection Cooling Refill Vacuum Coolant Fill Kit with Splashproof Hose**Orion Motor Tech**$46.77**4.3★85 rev](https://www.amazon.com/dp/B0FG33L47J) [4**Orion Motor Tech Coolant Pressure Tester Kit 33pc Master Coolant Vacuum Refill Kit with 23 Radiator Adapters Radiator Cooling System Pressure Tester Kit with Vacuum Pump Vacuum Purge & Refill Tool**Orion Motor Tech**$72.64**4.3★650 rev](https://www.amazon.com/dp/B0D3F6M7RC) [5**UView 550000 Airlift Cooling System Leak Checker and Airlock Purge Tool Kit OEM Approved Universal Connectors Minimum 90 PSI/60 Bar Used for Leak Detection Purging Airlocks A/C System Refill**UView**$150.45**4.7★1,740 rev](https://www.amazon.com/dp/B0002SRH5G)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Alltooetools Coolant Vacuum Refill Kit Radiator Cooling System Vacuum Refilling Gauge Tool with 32mm 35mm 40mm 45mm Apdapters**Alltooetools**$27.83**2 rev5mo ago](https://www.amazon.com/dp/B0GJ6KRWXF) [**Orion Motor Tech Coolant Vacuum Refill Kit 13pc Radiator Cooling System Tool Set with Conical Adapter 4 Round Adapters for Leak Detection Cooling Refill Vacuum Coolant Fill Kit with Hose Black**Orion Motor Tech**$45.62**85 rev6mo ago](https://www.amazon.com/dp/B0G7TGZCR3) [**VEVOR Radiator Vacuum Refill Kit Automotives Cooling System Vacuum & Purge Fill Tool with Gauge Portable Radiator Coolant Filling Kit with Toolbox Universal Fit for Most Cars Vans SUVs and Trucks**VEVOR**$28.81**47 rev8mo ago](https://www.amazon.com/dp/B0FXJZ1FDJ) [**BILITOOLS 10-Piece Coolant Vacuum Refill Kit Quick Airlift Coolant Refill Tool for Most Vehicles**BILITOOLS**$46.78**13 rev10mo ago](https://www.amazon.com/dp/B0FNWVR5BC) [**Orion Motor Tech Coolant Vacuum Refill Kit Cooling System Vacuum Fill Tool with Leak Detector 5 Round Adapters 1 Conical Adapter Radiator Coolant Fill Kit with Dual-Movement Gauge for Vacuum Leak**Orion Motor Tech**$66.80**81 rev11mo ago](https://www.amazon.com/dp/B0FKLY55Y5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Alltooetools Coolant Vacuum Refill Kit Radiator Cooling System Vacuum Refilling Gauge Tool with 32mm 35mm 40mm 45mm Apdapters**Alltooetools**$27.83**4.5★**▲ 286%**](https://www.amazon.com/dp/B0GJ6KRWXF) [**Orion Motor Tech Coolant Vacuum Refill Kit 13pc Radiator Cooling System Tool Set with Conical Adapter 4 Round Adapters for Leak Detection Cooling Refill Vacuum Coolant Fill Kit with Hose Black**Orion Motor Tech**$45.62**4.3★**▲ 275%**](https://www.amazon.com/dp/B0G7TGZCR3) [**BILITOOLS 10-Piece Coolant Vacuum Refill Kit Quick Airlift Coolant Refill Tool for Most Vehicles**BILITOOLS**$46.78**4.0★**▲ 218%**](https://www.amazon.com/dp/B0FNWVR5BC) [**VEVOR Radiator Vacuum Refill Kit Automotives Cooling System Vacuum & Purge Fill Tool with Gauge Portable Radiator Coolant Filling Kit with Toolbox Universal Fit for Most Cars Vans SUVs and Trucks**VEVOR**$28.81**4.3★**▲ 87%**](https://www.amazon.com/dp/B0FXJZ1FDJ) [**DAYUAN Radiator Cooling System Vacuum Purge Coolant Refill Tool Kit**DAYUAN**$25.11**3.9★**▲ 67%**](https://www.amazon.com/dp/B07MH1G4LY)
**~~View all trending →~~**
## **What buyers say about coolant vacuum refill kit**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**20%
*“nice quality set”*
**Ease Of Use**10%
*“Pretty handy”*
**Value For Money**9%
*“Great Value”*
**Coolant**9%
*“worked well for my coolant change”*
**Efficiency**7%
*“Works ok”*
**Advertised Vs Actual Product**7%
*“As advertised”*
**Leak-Proof**6%
*“Did not leak”*
**Size-Overall**6%
*“Excellent fit”*
**Durability**2%
*“Worked very well, durable and easy storage”*
**Pressure**2%
*“it held pressure consistently during testing”*
### **What buyers complain about **
**Quality-Overall**13%
*“Cheap quality”*
**Leak-Proof**12%
*“leaking”*
**Compatibility-Overall**12%
*“adapters that were not compatible”*
**Size-Overall**7%
*“Not large enough”*
**Coolant**6%
*“leaked coolant everywhere”*
**Pressure**5%
*“Does not pressurize system”*
**Functionality-Overall**4%
*“Did not work as stated”*
**Instructions/User Manual/Troubleshooting**4%
*“Terrible Instructions”*
**Value For Money**3%
*“Not even worth any money”*
**Advertised Vs Actual Product**2%
*“Was not advertised as such though”*
### **Top return reasons **
**Size-Overall**20%
**Compatibility-Overall**18%
**Coolant**13%
**Defective Material/Parts**8%
**Functionality-Overall**7%
**Leak-Proof**6%
**Pressure**5%
**Advertised Vs Actual Product**4%
**Value For Money**4%
**Add-Ons/Attachments**2%
## **Common questions**
- **Is coolant vacuum refill kit profitable to sell on Amazon United States?**
- The niche generates $461K/yr across 34 tracked products. 5 of 8 products launched in the last 360 days are still selling. 90-day search growth is -21.0%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the coolant vacuum refill kit niche?**
- 17 brands and 64 sellers compete. The top 5 products take 46% of clicks and top 5 brands hold 75% of demand.
- **What do buyers complain about in coolant vacuum refill kit?**
- Top complaints mined from reviews: Quality-Overall, Leak-Proof, Compatibility-Overall. The return rate is 3.4%.
- **When does demand for coolant vacuum refill kit peak?**
- Demand peaks in Jul; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the coolant vacuum refill kit niche?**
- Listings span $14.81–$150.45; the average listing price is $50.72 (sweet spot $15–$100). The average incumbent carries 1,264 reviews — the moat a new listing must climb.
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