Is locking gas cap profitable to sell on Amazon United States?

The niche generates $114K/yr across 29 tracked products. 2 of 6 products launched in the last 360 days are still selling. 90-day search growth is +2.3%. Flapen's verdict: Skip it (48/100).

How competitive is the locking gas cap niche?

22 brands and 56 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 58% of demand.

What do buyers complain about in locking gas cap?

Top complaints mined from reviews: Size-Overall, Compatibility-Overall, Quality-Overall. The return rate is 7.6% — above our launch gate.

When does demand for locking gas cap peak?

Demand is steady year-round — the busiest month runs 1.4× the quietest.

What does it cost to enter the locking gas cap niche?

Listings span $6.71–$25.94; the average listing price is $11.23 (sweet spot $15–$100). The average incumbent carries 647 reviews — the moat a new listing must climb.

locking gas cap

Skip it

High returns (7.6%) — this niche doesn't clear our bar today.

Quality gap

Incredible3.7★

avg incumbent rating — lower means beatable quality

Brand share

Great58%

top-5 brand share — no brand owns this niche

Review moat

Good647.07

avg incumbent reviews — the moat a new listing must climb

Price range

Good$6.71–$25.94

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

Competition

Good53%

top-5 click share — leaders hold, buyers still browse

Avg price

Okay$11.23

avg listing price — sweet spot $15–$100

Conversion

Okay3.3%

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

Growth

Okay+2.3%

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

Market size

Okay$114K

$114K/yr · 308K searches

Returns

Bad7.6%

return rate — above 5% kills the launch gate

Signals Quality Gap High Returns

According to Flapen's Amazon United States niche tracking, locking gas cap is a $114K/yr Amazon United States market (308K searches/yr). The top 5 brands hold 58% of demand. Verdict: Skip it — 48/100.

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

locking gas cap market data

Units sold / yr: 10K–13K; avg 250–500/product
Revenue / yr: $112K–$140K; units × avg price
Conversion rate: 3.3%
Avg BSR: #799
Page quality: 0%
Prime: 100%
Sponsored: 66%
Out of stock: 0.0%
Avg brand age: 36 months
Avg seller age: 177 days

Competition & brand share

The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.

Brands

22 rising

Sellers

Top-5 brand share

58%

Top 20: 98%

Top-5 click share

53%

Top 20: 89%

Open market

34%

ZONFANT21%
Hirificing10%
SEEBOO9%
Eponcia9%
MotoRad9%
ROVIKE8%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +2.3% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top locking gas cap search terms

locking gas cap137K/yr +7.4%2.5% conv.
gas cap lock62K/yr +4.1%2.1% conv.
locking fuel cap14K/yr +1.7%1.5% conv.
gas tank lock11K/yr +9.4%1.7% conv.
locking gas cap chevy silverado10K/yr -18.2%3.2% conv.
gas lock fuel cap with key9K/yr -3.0%1.7% conv.
lock gas cap with key8K/yr +14.1%3.3% conv.
gas cap with lock7K/yr +21.9%2.6% conv.
gas cap with key8K/yr -28.1%3.3% conv.
lockable gas cap6K/yr +6.9%2.5% conv.

All search terms

Top locking 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

ZONFANT Locking Gas Cap W/2 Keys Lock Fuel Cap Compatible With Chevy Honda Nissan Acura Mazda Cadillac GMC Vehicle 4Runner FJ Cruiser Silverado Camaro And More Replace#10504 77300-47020

ZONFANT$9.344.1★1,271 rev

Hirificing Locking Gas Cap Fuel Tank with Key Gas Cap Lock Locking Fuel Cap Cover Compatible with Toyota 4Runner Chevy Silverado 1500 2500 3500 Nissan GMC Honda Subaru Buick #10504 77300-47020

Hirificing$9.823.6★808 rev

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$11.943.5★151 rev

Locking Gas Cap Lock Fuel Cap Replace 5278655AA For 2000-2020 Dodge Jeep Chrysler - Ram 1500 2500 3500 Journey Caravan Charger Dakota Durango & Jeep Wrangler JK TJ Liberty & Chrysler 200 300 Sebring

ROVIKE$12.544.2★1,123 rev

Locking Gas Cap Lock Fuel Cap Compatible With Chevy GMC Silverado Cruze Express Malibu Colorado Suburban Tahoe Equinox Terrain Sierra Savana Acadia Acura Buick Cadillac Lexus And More

SEEBOO$10.094.0★1,028 rev

Newest

by launch date

HAMOJUF Car Locking Gas Cap OEM# 12495845 Heavy Duty Vehicle Fuel Filler Door Locking Cover with Keys Automotive Replacement Accessories Compatible with Accord Avalon Venza

HAMOJUF$8.7113 rev

3mo ago

FALVFUN Car Locking Gas Cap Heavy Duty Vehicle Lock Fuel Cap Cover Replace with Key Automotive OEM# 12495845 Replacement Accessories Compatible with Bonneville LeSabre Miata

FALVFUN$8.6647 rev

9mo ago

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

YYTQP Locking Gas Cap Fuel Tank with Key Lock Fuel Cap Cover Compatible with Dod-ge Ram Challenger Grand Caravan Ram 1500 Cherokee Wrangler TJ LJ JK JKU JL JLU JT # 05278655AB 5278655AB

YYTQP$9.4618 rev

10mo ago

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

HABNVUON$8.7347 rev

11mo ago

What buyers say about locking gas cap

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

What buyers love

Size-Overall38%

“Fit perfectly in the car”

Quality-Overall16%

“Excellent quality”

Efficiency9%

“Works, keeps the thieves out”

Value For Money8%

“Good product for the price”

Fuel Efficiency6%

“Protects your fuel investment”

Advertised Vs Actual Product4%

“Works as advertised”

Strength3%

“sturdy”

Ease Of Use2%

“Easy to use”

Durability2%

“Durable”

Assembly/Installation1%

“easy assembly”

What buyers complain about

Size-Overall29%

“It's too big”

Compatibility-Overall19%

“it didnt work for my car”

Quality-Overall7%

“Absolute garbage”

Functionality-Overall7%

“It doesn't work right”

Leak-Proof6%

“It leaks”

Advertised Vs Actual Product6%

“False advertising”

Durability5%

“Broke easily”

Ease Of Use3%

“Can be difficult”

Value For Money3%

“Just dont even buy this its a waste of money”

Material Quality2%

“it seems it's made of poor quality plastic”

Top return reasons

Size-Overall61%

Compatibility-Overall20%

Functionality-Overall4%

Mechanism Issues3%

Advertised Vs Actual Product3%

Defective Material/Parts2%