Is o2 sensor bung profitable to sell on Amazon United States?

The niche generates $112K/yr across 24 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is -1.0%. Flapen's verdict: Skip it (48/100).

How competitive is the o2 sensor bung niche?

18 brands and 20 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 73% of demand.

What do buyers complain about in o2 sensor bung?

Top complaints mined from reviews: Advertised Vs Actual Product, Quality-Overall, Size-Overall. The return rate is 1.7%.

When does demand for o2 sensor bung peak?

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

What does it cost to enter the o2 sensor bung niche?

Listings span $6.52–$24.10; the average listing price is $13.46 (sweet spot $15–$100). The average incumbent carries 173 reviews — the moat a new listing must climb.

o2 sensor bung

Skip it

Strong incumbent ratings (4.7★) — this niche doesn't clear our bar today.

Review moat

Great172.83

avg incumbent reviews — the moat a new listing must climb

Conversion

Great9.3%

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

Returns

Great1.7%

return rate — above 5% kills the launch gate

Avg price

Good$13.46

avg listing price — sweet spot $15–$100

Brand share

Good73%

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

Price range

Good$6.52–$24.10

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

Competition

Okay58%

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

Market size

Okay$112K

$112K/yr · 89K searches

Growth

Bad-1.0%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, o2 sensor bung is a $112K/yr Amazon United States market (89K searches/yr). The top 5 brands hold 73% of demand. Verdict: Skip it — 48/100.

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

o2 sensor bung market data

Units sold / yr: 8K–10K; avg 250–500/product
Revenue / yr: $108K–$135K; units × avg price
Conversion rate: 9.3%
Avg BSR: #404
Page quality: 0%
Prime: 100%
Sponsored: 71%
Out of stock: 2.4%
Avg brand age: 40 months
Avg seller age: 181 days

Competition & brand share

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.

Brands

18 rising

Sellers

Top-5 brand share

73%

Top 20: 100%

Top-5 click share

58%

Top 20: 98%

Open market

22%

HOHNNYREET30%
LEDAUT16%
Wevdn11%
joytrace10%
AMAAM7%
JGR4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -1.0% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top o2 sensor bung search terms

o2 sensor bung48K/yr -0.1%8.5% conv.
02 sensor bung17K/yr -8.6%9.6% conv.
o2 bung8K/yr +40.7%11.0% conv.
oxygen sensor bung7K/yr -8.5%9.4% conv.
02 bung3K/yr +1.0%8.6% conv.
weld in o2 sensor bung3K/yr -6.8%12.1% conv.
o2 bung weld in3K/yr -40.5%11.9% conv.

All search terms

Top o2 sensor bung 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

4 Pcs O2 Sensor Bung 304 Stainless Steel M18x1.5 O2 Bung Weld in Oxygen Sensor Bung Stepped Style

HOHNNYREET$12.904.9★111 rev

Ledaut M18X1.5 Bung and Plug Notched Style (2 Bungs/ 2 Plugs) Notched Style Fitting Bungs M18X1.5

LEDAUT$13.094.7★1,382 rev

joytrace M18x1.5 Oxygen Sensor Weld Bungs & Plugs Kit (2 Bungs/2 Plugs) - Stainless Steel Welding Adapters

joytrace$10.084.8★47 rev

Wevdn M181.5 Stepped Mounting Bung and Plug 304 Stainless Steel Notched Style Mounting Bung & Plug O2 Oxygen Sensor Mounting Exhaust Weld in Bung Plug Car Accessories

Wevdn$6.984.6★103 rev

O2 Oxygen Sensor Bung and Plug 304 Stainless Steel M18-1.5 Oxygen Sensor Bung Stepped Style with Plug Suppied by Hohnnyreet (2 Silver M18 X 1.5)

HOHNNYREET$12.414.7★182 rev

Newest

by launch date

Ucreative O2 Sensor Bung 304 Stainless Steel M18 x 1.5 Weld in Oxygen Sensor Bung (4PCS)

Ucreative$8.8413 rev

9mo ago

Ywdiml 4PCS M181.5 Car Stepped Mounting Bung and Plug 304 Stainless Steel Vehicle Oxygen Sensor Bung Automotive Sensor Notched Nut Weld Plugs Accessories Universal for SUV Sedan Truck

Ywdiml$6.5212 rev

9mo ago

4PCS M18x1.5 Car Sensor Bung 304 Stainless Steel Automotive Sensor Bung with Stepped Design for Automotive Exhaust Pipes Welded Car Sensors Bungs Vehicle Accessories

YGDMD$7.718 rev

10mo ago

O2 Oxygen Sensor Bung and Plug with Copper Gasket 304 Stainless Steel (2Pack 1.5)

SARANICE$10.3920 rev

11mo ago

O2 Sensor Bung Weld in with Plug 2 Set O2 Bung 304 Stainless Steel M18-1.5 Oxygen Sensor Bungs Plugs with Copper O-Ring for Automotive Bike Motocycle

HOHNNYREET$14.0954 rev

11mo ago

What buyers say about o2 sensor bung

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

What buyers love

Quality-Overall39%

“The machining is good quality”

Size-Overall11%

“Good fit”

Value For Money10%

“Good deal”

Advertised Vs Actual Product9%

“Work as they should”

Assembly/Installation6%

“Easy to install”

Efficiency6%

“Work good”

Material Quality4%

“Nice quality stainless steel fittings at an economical price”

Ease Of Use3%

“It's easy to use”

Socket/Port/Plug2%

“Plug”

Leak-Proof2%

“this was quick and works, doesn't seem to leak, at some point will weld in one”

What buyers complain about

Advertised Vs Actual Product25%

“Does not come as package shown”

Quality-Overall19%

“Trash”

Size-Overall13%

“it is tight”

Sensor13%

“I needed a plug to install into my new Catalytic Converter for my vehicle that does not have a rear Oxygen Sensor so I blocked off the bung hole”

Rusts/Corrodes6%

“My oxygen sensor bung rusted out of the exhaust pipe”

Heating4%

“If you get them too hot”

Value For Money4%

“which was selling for $8 at the time of this review - SEE MY NOTE at the end of this review”

Top return reasons

Size-Overall51%

Compatibility-Overall10%

Value For Money7%

Defective Material/Parts4%

Material Quality4%

Advertised Vs Actual Product4%

Sensor3%

Width3%

Ease Of Use2%

Quality-Overall2%

Common questions

Is o2 sensor bung profitable to sell on Amazon United States?: The niche generates $112K/yr across 24 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is -1.0%. Flapen's verdict: Skip it (48/100).
How competitive is the o2 sensor bung niche?: 18 brands and 20 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 73% of demand.
What do buyers complain about in o2 sensor bung?: Top complaints mined from reviews: Advertised Vs Actual Product, Quality-Overall, Size-Overall. The return rate is 1.7%.
When does demand for o2 sensor bung peak?: Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the o2 sensor bung niche?: Listings span $6.52–$24.10; the average listing price is $13.46 (sweet spot $15–$100). The average incumbent carries 173 reviews — the moat a new listing must climb.