Is gas cap profitable to sell on Amazon United States?

The niche generates $768K/yr across 77 tracked products. 5 of 11 products launched in the last 360 days are still selling. 90-day search growth is -11.3%. Flapen's verdict: Worth a look (61/100).

How competitive is the gas cap niche?

36 brands and 111 sellers compete. The top 5 products take 24% of clicks and top 5 brands hold 63% of demand.

What do buyers complain about in gas cap?

Top complaints mined from reviews: Size-Overall, Compatibility-Overall, Durability. The return rate is 3.1%.

When does demand for gas cap peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the gas cap niche?

Listings span $5.38–$40.50; the average listing price is $11.19 (sweet spot $15–$100). The average incumbent carries 1,378 reviews — the moat a new listing must climb.

gas cap

Worth a look

Shows a fragmented shelf (top 5 take 24% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Competition

Great24%

top-5 click share — an open shelf

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Price range

Good$5.38–$40.50

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

Market size

Good$768K

$768K/yr · 1.2M searches

Brand share

Good63%

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

Conversion

Good5.6%

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

Review moat

Good1,378.32

avg incumbent reviews — the moat a new listing must climb

Returns

Okay3.1%

return rate — above 5% kills the launch gate

Avg price

Okay$11.19

avg listing price — sweet spot $15–$100

Growth

Bad-11.3%

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

According to Flapen's Amazon United States niche tracking, gas cap is a $768K/yr Amazon United States market (1.2M searches/yr). The top 5 brands hold 63% of demand. Verdict: Worth a look — 61/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

gas cap market data

Units sold / yr: 60K–80K; avg 750–1,000/product
Revenue / yr: $671K–$895K; units × avg price
Conversion rate: 5.6%
Avg BSR: #469
Page quality: 0%
Prime: 100%
Sponsored: 79%
Out of stock: 1.3%
Avg brand age: 41 months
Avg seller age: 161 days

Competition & brand share

Clicks spread well past the top 5 (24% combined) — an open shelf where new products get seen.

Brands

36 falling

Sellers

111

Top-5 brand share

63%

Top 20: 89%

Top-5 click share

24%

Top 20: 53%

Open market

33%

ROVIKE28%
Manymiba21%
Gates7%
GM GENUINE PARTS4%
Anleecap4%
Eponcia3%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -11.3% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top gas cap search terms

gas cap611K/yr -17.0%4.4% conv.
gas cap replacement220K/yr -1.2%4.8% conv.
fuel cap108K/yr -10.4%3.2% conv.
automotive replacement fuel tank caps31K/yr +16.0%1.5% conv.
fuel cap replacement32K/yr +2.5%4.0% conv.
fuel tank cap35K/yr -12.1%1.7% conv.
gas tank cap30K/yr -5.5%2.2% conv.
gas cap oem37K/yr -43.4%3.7% conv.
oem gas cap24K/yr -2.4%2.7% conv.
automotive replacement caps11K/yr -14.9%1.1% conv.

All search terms

Top gas cap 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Gas Cap Fuel Cap For 2000-2019 Dodge Ram 1500 2500 3500 Charger Challenger Durango Journey Nitro Grand Caravan Caliber Dakota & Chrysler 200 300 Town and Country Aspen Sebring Jeep Wrangler JK Liberty

ROVIKE$11.164.4★12,057 rev

Gas Cap Fuel Cap For Kia soul sedona Forte Sportage Sorento Spectra Optima Amanti Cadenza Rio & Hyundai Sonata Elantra Santa Accent Tucson Azera Entourage Equus Genesis Genesis Coupe Veloster

ROVIKE$11.464.4★12,057 rev

Gas Cap Fuel Cap For Honda Civic Accord Pilot CRV CR-V Odyssey Crosstour Fit Insight HRV HR-V Includ 2013 2014 2015 2016 2017 2018 2019 2020 2007 2008 2009 2010 2011 2012 17670-T3W-A01

ROVIKE$12.424.4★12,057 rev

Gates 31832 OE Equivalent Fuel Tank Cap

Gates$9.414.4★3,890 rev

Gas Cap Fuel Cap For 2003-2018 Jeep Wrangler JK TJ Liberty Patriot Cherokee Compass Commander Grand Cherokee Dodge Ram 1500 2500 Journey Dakota Dart Durango Caravan Chrysler 200 300 Town and Country

ROVIKE$11.274.4★4,896 rev

Newest

by launch date

Eponcia Locking Gas Cap lock Locking Fuel Cap with Key for 4Runner Chevy Silverado 1500 2500 3500 Nissan GMC Subaru Buick Gas Lock Fuel Tank Caps Cover Replacement with Key 77300-47020 10504

Eponcia$11.94151 rev

10mo ago

Eponcia Gas Cap Fuel Tank Cap OEM for Toyota Scion Tacoma Lexus ES350 GS350 GS460 LX470 4Runner Avalon Camry Corolla Highlander Matrix RAV4 77300-06040 Automotive Replacement Oil Fuel Caps

Eponcia$10.0263 rev

10mo ago

Rebvugr Gas Cap Fuel Cap Replacement Automotive Replacement Fuel Tank Covers Car Accessories Fit for Dodge Ram 1500 2500 3500 Charger Challenger Replaces OEM#52030377AB 5278632AG 52030377AA

Rebvugr$7.2561 rev

11mo ago

LivTee Gas Cap Fuel Cap Fits Toyota Camry 2002-2006 Tacoma 4Runner Highlander Sequoia Tundra Sienna Avalon Corolla Matrix Solara Fits Lexus ES330 2004-2006 ES300 RX330 Car Accessories 77300-33070

LivTee$8.93306 rev

11mo ago

SWQS Gas Cap Fuel Cap Replacement OEM 95995094 for Chevy Malibu Impala Equinox Colorado Trailblazer GMC Canyon Envoy Savana Buick LaCrosse Rendezvous Cadillac CTS STS DTS SRX XLR Pontiac

SWQS$8.8695 rev

1y ago

What buyers say about gas cap

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

What buyers love

Size-Overall47%

“Fit like a glove”

Quality-Overall12%

“Excellent Product”

Value For Money8%

“Great Value”

Advertised Vs Actual Product8%

“As advertised”

Efficiency5%

“Worked Out of the Box”

Fuel Efficiency5%

“Fuel capacity fits and functions well”

Assembly/Installation5%

“Less than 5 min install”

Leak-Proof1%

“works great with no air leaks”

Maintenance And Repair1%

“It was a good temporary fix”

Ease Of Use1%

“Simple to use”

What buyers complain about

Size-Overall22%

“Didn't fit”

Compatibility-Overall18%

“Works but wouldnt fit the connector”

Durability8%

“Broke after the first use”

Functionality-Overall8%

“not functional”

Quality-Overall7%

“Cord is not great quality”

Leak-Proof6%

“Immediately leaked”

Advertised Vs Actual Product3%

“Incorrect description”

Value For Money2%

“$35 cheaper”

Touch/Button Controls2%

“this doesn't even do a single click”

Ease Of Use2%

“Not easy to open”

Top return reasons

Size-Overall56%

Compatibility-Overall17%

Functionality-Overall8%

Defective Material/Parts4%

Advertised Vs Actual Product4%

Leak-Proof2%