---
title: "Polaris 3900 Parts — $494K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/polaris-3900-parts"
last_updated: "2026-08-07T14:35:29.641Z"
locale: en
meta:
description: "Niche score 55/100 · $494K/yr market · 18K searches/yr. Prices mostly outside the sweet spot ($15.15–$937.12) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $494K/yr market · 18K searches/yr. Prices mostly outside the sweet spot ($15.15–$937.12) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Polaris 3900 Parts — $494K/yr Amazon US Niche (2026) - Flapen"
---
# **polaris 3900 parts**
**Worth a look**
Shows low returns (0.7%), but prices mostly outside the sweet spot ($15.15–$937.12) keeps it on the watch list.
Market size 60Growth 73Conversion 87Competition 15Returns 97Price range 9Avg price 36Brand share 23Review moat 67Quality gap 65
**Returns**
**Incredible****0.7%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****10.0%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Good****+56.1%**
90-day search growth — must beat 0% to launch
**Review moat**
**Good****831.38**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****$494K**
$494K/yr · 18K searches
**Avg price**
**Okay****$268.88**
avg listing price — sweet spot $15–$100
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****82%**
top-5 click share — a locked-up shelf
**Price range**
**Bad****$15.15–$937.12**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**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, polaris 3900 parts is a $494K/yr Amazon United States market (18K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Worth a look — 55/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **polaris 3900 parts market data**
- **Units sold / yr**
- **1K–2K**
- avg 100–250/product
- **Revenue / yr**
- **$336K–$403K**
- units × avg price
- **Conversion rate**
- **10.0%**
- **Avg BSR**
- **#380**
- **Page quality**
- **0%**
- **Prime**
- **92%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **39 months**
- **Avg seller age**
- **191 days**
## **Competition & brand share**
The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **—flat
**Sellers**
**34**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**82%**
Top 20: 100%
**Open market**
**6%**
- Polaris46% - E-cowlboy25% - Zodiac8% - Hihitomorrow7% - ATIE5% - Bzcovac3% - Open — no brand owns it (2 brands, 6%)
## **Demand & seasonality**
Weekly Amazon search volume, last 60 weeks — +56.1% search growth over the last 90 days.
800600Spike '25Spike '26 seasonJunJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 4.8×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/polaris-3900-parts/trend)
## **Top polaris 3900 parts search terms**
- **polaris 3900 parts**5K/yr+35.8%5.2% conv. - **polaris 3900**5K/yr+38.2%4.1% conv. - **polaris 3900 rebuild kit**4K/yr+71.7%8.0% conv. - **polaris 3900 sport**4K/yr+101.7%4.0% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/polaris-3900-parts/search-terms)
## **Top polaris 3900 parts 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%$49K20%$99K30%$148K40%$198K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Polaris Vac-Sweep 3900 Sport Pressure Side Pool Cleaner**Polaris**$914.58**4.0★534 rev](https://www.amazon.com/dp/B001TZ45GU) [2**Replacement for Zodiac Polaris R0543200 3900 Sport Robotic Swimming Pool Cleaner Rebuild Kit Tune-Up Kit Accessory Also for P39 Sport Pressure Inground Pool Cleaner Upgraded Silver**E-cowlboy**$181.38**4.0★47 rev](https://www.amazon.com/dp/B0D73BD35V) [3**Zodiac Polaris 3900 Factory Rebuild Kit R0543200**Zodiac**$218.80**4.6★676 rev](https://www.amazon.com/dp/B008S0YIW0) [4**Polaris Vac-Sweep P39 Pressure Inground Pool Cleaner Triple Jet Powered with a Dual Chamber SuperBag for Debris**Polaris**$937.12**3.6★72 rev](https://www.amazon.com/dp/B01GWSJMQ6) [5**R0543200 Tune-Up Kit + (3 Pack) 48-232 Wide Trax Tires for Polaris 3900 Sport P39 & 480 - Complete Pool Cleaner Refurbishment Set with Gearbox Chain System & High-Traction Replacement Wheels**Bzcovac**$194.07**3.5★2 rev](https://www.amazon.com/dp/B0GQXDHR7C)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**R0543200 Tune-Up Kit + (3 Pack) 48-232 Wide Trax Tires for Polaris 3900 Sport P39 & 480 - Complete Pool Cleaner Refurbishment Set with Gearbox Chain System & High-Traction Replacement Wheels**Bzcovac**$194.07**2 rev4mo ago](https://www.amazon.com/dp/B0GQXDHR7C) [**Gearbox with Tires Replacement Kit Fit for Robotic Swimming Pool Cleaner Vacumm**Hihitomorrow**$193.25**1 rev4mo ago](https://www.amazon.com/dp/B0GQ3F5FB2) [**R0543200 Tune Up Rebuild Repair Kit Gearbox Assembly Replacement Parts Fit for Polaris 3900 P39 Sport Robotic Swimming Pool Cleaner Vacumm**Hihitomorrow**$178.50**1 rev1y ago](https://www.amazon.com/dp/B0F5B1RSMY) [**39-300 WMS Water Management Assembly with O-Ring Replacement Parts Rebuild Kit Fit for Zodiac Polaris 3900 P39 Sport Robotic Swimming Pool Cleaner Vacumm**Hihitomorrow**$30.70**4 rev1y ago](https://www.amazon.com/dp/B0DZNP9155) [**Replacement for Zodiac Polaris R0543200 3900 Sport Robotic Swimming Pool Cleaner Rebuild Kit Tune-Up Kit Accessory Also for P39 Sport Pressure Inground Pool Cleaner Upgraded Silver**E-cowlboy**$181.38**47 rev2y ago](https://www.amazon.com/dp/B0D73BD35V)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**R0543200 Tune-Up Kit + (3 Pack) 48-232 Wide Trax Tires for Polaris 3900 Sport P39 & 480 - Complete Pool Cleaner Refurbishment Set with Gearbox Chain System & High-Traction Replacement Wheels**Bzcovac**$194.07**3.5★**▲ 166%**](https://www.amazon.com/dp/B0GQXDHR7C) [**Gearbox with Tires Replacement Kit Fit for Robotic Swimming Pool Cleaner Vacumm**Hihitomorrow**$193.25**5.0★**▲ 165%**](https://www.amazon.com/dp/B0GQ3F5FB2) [**MAKHOON Upgraded G52 Backup Valve Replacement for Polaris Pool Cleaner Parts Compatible with Polaris 180 280 380 480 3900 Pool Cleaner The Valve Body has Been ReinforcedLonger Life Than Zodiac G52**MAKHOON**$28.61**4.3★**▲ 17%**](https://www.amazon.com/dp/B08CRBD7QD) [**Polaris Vac-Sweep 280 Pressure-Side In-ground Pool Cleaner Double Venturi Jet Powered 31ft of Hose with an All Purpose Debris Bag**Polaris**$564.35**4.4★**▲ 15%**](https://www.amazon.com/dp/B002HRET6A) [**Polaris Vac-Sweep 3900 Sport Pressure Side Pool Cleaner**Polaris**$914.58**4.0★**▲ 13%**](https://www.amazon.com/dp/B001TZ45GU)
**~~View all trending →~~**
## **What buyers say about polaris 3900 parts**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“No complaints”*
**Value For Money**16%
*“Affordable”*
**Assembly/Installation**15%
*“installed product, works fine”*
**Advertised Vs Actual Product**12%
*“Exactly what I needed”*
**Ease Of Cleaning**11%
*“Clean pool”*
**Ease Of Use**5%
*“Its simple to use”*
**Size-Overall**4%
*“Fit perfect”*
**Durability**3%
*“Reliability”*
**Instructions/User Manual/Troubleshooting**2%
*“The instructions were so thorough which is exactly what I need with these types of things”*
**Socket/Port/Plug**1%
*“Powerful plug and play”*
### **What buyers complain about **
**Durability**21%
*“Broke”*
**Quality-Overall**13%
*“Useless and poor quality control”*
**Value For Money**6%
*“Replacement collection bags are outrageous in cost”*
**Maintenance And Repair**5%
*“the first lasted at leased 15 years with some repairs along the way”*
**Instructions/User Manual/Troubleshooting**5%
*“The instructions to get it to work well are non existent”*
**Strength**4%
*“wheel attachment is extremely fragile”*
**Functionality-Overall**4%
*“Not effective”*
**Ease Of Cleaning**3%
*“hard to remove from cleaner and zipper failure”*
**Material Quality**3%
*“cheap plastic molded parts”*
**Defective Material/Parts**3%
*“Defective device, no customer support”*
### **Top return reasons **
**Defective Material/Parts**33%
**Functionality-Overall**12%
**Size-Overall**11%
**Product Condition**7%
**Value For Money**6%
**Connectivity-Overall**4%
**Add-Ons/Attachments**4%
**Ease Of Cleaning**3%
**Advertised Vs Actual Product**3%
**Leak-Proof**3%
## **Common questions**
- **Is polaris 3900 parts profitable to sell on Amazon United States?**
- The niche generates $494K/yr across 13 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +56.1%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the polaris 3900 parts niche?**
- 8 brands and 34 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in polaris 3900 parts?**
- Top complaints mined from reviews: Durability, Quality-Overall, Value For Money. The return rate is 0.7%.
- **When does demand for polaris 3900 parts peak?**
- Demand peaks in May–Jun–Jul–Aug; the busiest month runs 4.8× the quietest.
- **What does it cost to enter the polaris 3900 parts niche?**
- Listings span $15.15–$937.12; the average listing price is $268.88 (sweet spot $15–$100). The average incumbent carries 831 reviews — the moat a new listing must climb.
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