Is coolant funnel kit profitable to sell on Amazon United States?

The niche generates $754K/yr across 11 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -5.4%. Flapen's verdict: Skip it (47/100).

How competitive is the coolant funnel kit niche?

9 brands and 18 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 88% of demand.

What do buyers complain about in coolant funnel kit?

Top complaints mined from reviews: Compatibility-Overall, Leak-Proof, Size-Overall. The return rate is 2.9%.

When does demand for coolant funnel kit peak?

Demand peaks in Jan–May; the busiest month runs 1.7× the quietest.

What does it cost to enter the coolant funnel kit niche?

Listings span $17.06–$23.37; the average listing price is $19.56 (sweet spot $15–$100). The average incumbent carries 3,528 reviews — the moat a new listing must climb.

coolant funnel kit

Skip it

A concentrated shelf (top 5 take 81% of clicks) — this niche doesn't clear our bar today.

Price range

Incredible$17.06–$23.37

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Great$19.56

avg listing price — sweet spot $15–$100

Conversion

Great8.7%

search→purchase rate — share of searches ending in a sale

Market size

Good$754K

$754K/yr · 443K searches

Returns

Good2.9%

return rate — above 5% kills the launch gate

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Review moat

Okay3,528.45

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay88%

top-5 brand share — brands hold most of the demand

Growth

Bad-5.4%

90-day search growth — must beat 0% to launch

Competition

Bad81%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, coolant funnel kit is a $754K/yr Amazon United States market (443K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Jan–May. Verdict: Skip it — 47/100.

Data updated Jul 12, 2026 · scored weekly · How we score niches

coolant funnel kit market data

Units sold / yr: 40K–50K; avg 4,000–5,000/product
Revenue / yr: $782K–$978K; units × avg price
Conversion rate: 8.7%
Avg BSR: #50
Page quality: 0%
Prime: 100%
Sponsored: 100%
Out of stock: 0.0%
Avg brand age: 41 months
Avg seller age: 173 days

Competition & brand share

The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.

Brands

9 rising

Sellers

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

81%

Top 20: 100%

Open market

EPAuto41%
SEDY17%
OEMTOOLS16%
ELEAD9%
Orion Motor Tech5%
SWANLAKE GARDEN TOOLS3%
Open — no brand owns it (3 brands, 8%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -5.4% search growth over the last 90 days.

Peak months: Jan, May · busiest ÷ quietest = 1.7×

Open Trend

Top coolant funnel kit search terms

coolant funnel kit145K/yr -15.2%8.5% conv.
coolant funnel43K/yr +10.9%7.8% conv.
coolant bleeder kit34K/yr -10.2%5.8% conv.
radiator funnel26K/yr +6.3%8.6% conv.
spill free funnel kit cooling system20K/yr -15.0%11.9% conv.
no spill coolant funnel kit21K/yr -10.0%9.5% conv.
radiator funnel burping kit20K/yr -13.7%10.6% conv.
no spill funnel14K/yr -7.1%7.7% conv.
radiator fill funnel kit14K/yr -8.1%9.9% conv.
spill free funnel12K/yr +5.0%6.8% conv.

All search terms

Top coolant funnel 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 11 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

EPAuto Spill Proof Radiator Coolant Filling Funnel Kit

EPAuto$21.824.7★20,365 rev

OEMTOOLS No-Spill Coolant Funnel Kit 15 Piece Fluid and Oil Funnel Set Allows Access To Hard-To-Reach Radiators

OEMTOOLS$21.964.6★8,819 rev

Ultimate No Spill Coolant Funnel Kit - 19-Piece Spill-Free Radiator Funnel Set Spill Proof Radiator Bleeder Kit Coolant Filling Radiator Filler Extra Funnels and Adapters for Universal Vehicle

SEDY$17.544.4★2,025 rev

22-Piece No-Spill Coolant Filling Funnel Kit and Siphon Hose Pump Radiator Coolant Filling Spill-Proof Funnel Kit with Adapters Extensions PVC Hose Engine Oil Funnels Towel for Universal Vehicle

SEDY$23.374.4★419 rev

ELEAD No-Spill Coolant Funnel Kit - 19-Piece Radiator Funnel burping kit coolant Bleeder kit Extra Funnels and Adapters for Universal Vehicle

ELEAD$17.064.5★1,006 rev

Newest

by launch date

20-Piece No-Spill Coolant Funnel Kit Cooling System Funnels Kits Spill Proof Funnel Bleeder Radiator Funnels Kit with Adapters Extensions Flexible Hose Circular-Funnel Towel for Automotive Use

ELEAD$20.7452 rev

5mo ago

Orion Motor Tech No Spill Coolant Funnel Kit 17 Piece Coolant Bleeder Kit

Orion Motor Tech$17.34171 rev

7mo ago

22-Piece No-Spill Coolant Filling Funnel Kit and Siphon Hose Pump Radiator Coolant Filling Spill-Proof Funnel Kit with Adapters Extensions PVC Hose Engine Oil Funnels Towel for Universal Vehicle

SEDY$23.37419 rev

1y ago

2026 Upgraded Coolant Bleeder Funnel Kit Radiator Burping Funnel

SMART JERRY$20.78502 rev

1y ago

ELEAD No-Spill Coolant Funnel Kit - 19-Piece Radiator Funnel burping kit coolant Bleeder kit Extra Funnels and Adapters for Universal Vehicle

ELEAD$17.061,006 rev

3y ago

What buyers say about coolant funnel kit

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall19%

“nice quality set”

Ease Of Use11%

“Pretty handy”

Leak-Proof10%

“Did not leak”

Coolant9%

“worked well for my coolant change”

Value For Money9%

“Great Value”

Efficiency8%

“Does it's job”

Advertised Vs Actual Product6%

“As advertised”

Size-Overall5%

“Fits securely”

Ease Of Cleaning3%

“No messes”

Maintenance And Repair2%

“Great products to have for vehicle repairs”

What buyers complain about

Compatibility-Overall21%

“Pieces are not compatible”

Leak-Proof19%

“It leaks”

Size-Overall11%

“Not large enough”

Quality-Overall10%

“Quality is pretty low”

Coolant5%

“coolant was drain”

Functionality-Overall3%

“The functionality is extremely poor”

Instructions/User Manual/Troubleshooting2%

“Instructions are useless”

Material Quality2%

“Very poor material”

Value For Money2%

“just a little too expensive”

Ease Of Use1%

“Cant use it”

Top return reasons

Size-Overall26%

Compatibility-Overall19%

Coolant15%

Leak-Proof8%

Defective Material/Parts8%

Functionality-Overall4%

Value For Money4%

Advertised Vs Actual Product4%

Add-Ons/Attachments3%

Quality-Overall1%

Common questions

Is coolant funnel kit profitable to sell on Amazon United States?: The niche generates $754K/yr across 11 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -5.4%. Flapen's verdict: Skip it (47/100).
How competitive is the coolant funnel kit niche?: 9 brands and 18 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 88% of demand.
What do buyers complain about in coolant funnel kit?: Top complaints mined from reviews: Compatibility-Overall, Leak-Proof, Size-Overall. The return rate is 2.9%.
When does demand for coolant funnel kit peak?: Demand peaks in Jan–May; the busiest month runs 1.7× the quietest.
What does it cost to enter the coolant funnel kit niche?: Listings span $17.06–$23.37; the average listing price is $19.56 (sweet spot $15–$100). The average incumbent carries 3,528 reviews — the moat a new listing must climb.