---
title: "o2 sensor bung — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/o2-sensor-bung"
last_updated: "2026-07-09T22:52:55.625Z"
locale: en
meta:
  description: "a small market ($112K/yr) — o2 sensor bung doesn't clear our bar today."
  "og:description": "a small market ($112K/yr) — o2 sensor bung doesn't clear our bar today."
  "og:title": "o2 sensor bung — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
---

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# **o2 sensor bung**

**Skip it****44/100 **

a small market ($112K/yr) — o2 sensor bung doesn't clear our bar today.

**Market/yr**

**$112K**

**Growth (1y)**

**+162.9%**

**Products**

**24**

**Brands**

**18**

was 16 a year ago

**Sellers**

**20**

**Price range**

**$6.52–$24.10**

**Returns**

**1.7%**

**Rating**

**4.7★**

**Skip it**

Scored 44/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**6**

 ×0.30

Growth

**72**

 ×0.30

Competition

**48**

 ×0.20

Quality gap

**20**

 ×0.10

Returns

**87**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +162.9% year over year.

2K1KSpike '24Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

No pronounced peak months · busiest ÷ quietest = 1.4×

## **Competition**

- HOHNNYREET30% - LEDAUT16% - Wevdn11% - joytrace10% - AMAAM7% - JGR4% - Other (12 brands)22%

The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them. 18 brands and 20 sellers compete here.

**Brands**

**18 **▲rising

was 16 a year ago

**Sellers**

**20**

**Top 5 brand share**

**73%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![4 Pcs O2 Sensor Bung 304 Stainless Steel M18x1.5 O2 Bung Weld in Oxygen Sensor Bung Stepped Style](https://m.media-amazon.com/images/I/41wW3wOtcmL.jpg) [**4 Pcs O2 Sensor Bung 304 Stainless Steel M18x1.5 O2 Bung Weld in Oxygen Sensor Bung Stepped Style**](https://www.amazon.com/dp/B0F2SH8RBR)

HOHNNYREET$12.904.9★11119%▲rising

2
![Ledaut M18X1.5 Bung and Plug Notched Style (2 Bungs/ 2 Plugs) Notched Style Fitting Bungs M18X1.5](https://m.media-amazon.com/images/I/41dGHEkd3HL.jpg) [**Ledaut M18X1.5 Bung and Plug Notched Style (2 Bungs/ 2 Plugs) Notched Style Fitting Bungs M18X1.5**](https://www.amazon.com/dp/B01N0DZO12)

LEDAUT$13.094.7★1,38216%▼falling

3
![joytrace M18x1.5 Oxygen Sensor Weld Bungs & Plugs Kit (2 Bungs/2 Plugs) - Stainless Steel Welding Adapters](https://m.media-amazon.com/images/I/41XhHJUdYKL.jpg) [**joytrace M18x1.5 Oxygen Sensor Weld Bungs & Plugs Kit (2 Bungs/2 Plugs) - Stainless Steel Welding Adapters**](https://www.amazon.com/dp/B0F2HFZW8T)

joytrace$10.084.8★4710%▲rising

4
![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](https://m.media-amazon.com/images/I/31YGP-rEWKL.jpg) [**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**](https://www.amazon.com/dp/B0DHPFB17T)

Wevdn$6.984.6★1039%▼falling

5
![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)](https://m.media-amazon.com/images/I/41qvHtuEB0L.jpg) [**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)**](https://www.amazon.com/dp/B0DG8ZK8J7)

HOHNNYREET$12.414.7★1825%▼falling

6
![JGR O2 Oxygen Sensor Stepped Weld Bungs (5 Bungs/5 Plugs) M18 x 1.5](https://m.media-amazon.com/images/I/41-udpJ5c3L.jpg) [**JGR O2 Oxygen Sensor Stepped Weld Bungs (5 Bungs/5 Plugs) M18 x 1.5**](https://www.amazon.com/dp/B07FL8N46B)

JGR$14.674.6★4624%▲rising

7
![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](https://m.media-amazon.com/images/I/41Ap4Tjfn3L.jpg) [**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**](https://www.amazon.com/dp/B0FDQX17N6)

HOHNNYREET$14.094.8★544%▲rising

8
![O2 Oxygen Sensor Fitting Plugs or Weld Bungs (10 Steel Stepped Bungs M18 x 1.5)](https://m.media-amazon.com/images/I/41VVhGfg-oL.jpg) [**O2 Oxygen Sensor Fitting Plugs or Weld Bungs (10 Steel Stepped Bungs M18 x 1.5)**](https://www.amazon.com/dp/B079V4V5JX)

AMAAM$20.084.8★1984%▲rising

9
![Ucreative O2 Sensor Bung 304 Stainless Steel M18 x 1.5 Weld in Oxygen Sensor Bung (4PCS)](https://m.media-amazon.com/images/I/31Nso7WVbVL.jpg) [**Ucreative O2 Sensor Bung 304 Stainless Steel M18 x 1.5 Weld in Oxygen Sensor Bung (4PCS)**](https://www.amazon.com/dp/B0FS6B4RZJ)

Ucreative$8.844.9★133%▲rising

10

![O2 Oxygen Sensor Fitting Plugs or Weld Bungs (10 pack Steel Bungs M18 x 1.5) (10 pack Steel Bungs M18 X 1.5)](https://m.media-amazon.com/images/I/41kJJmPO+FL.jpg) [**O2 Oxygen Sensor Fitting Plugs or Weld Bungs (10 pack Steel Bungs M18 x 1.5) (10 pack Steel Bungs M18 X 1.5)**](https://www.amazon.com/dp/B079V5Q7XC)

AMAAM$20.064.7★2693%—flat

11

![HYAT 2 Pairs O2 Sensor Bung Universal Stainless Steel M18 M18-1.5 Weld Oxygen Air Fuel Ratio Meter (2 Bungs/2 Plugs)](https://m.media-amazon.com/images/I/41HaP63bECL.jpg) [**HYAT 2 Pairs O2 Sensor Bung Universal Stainless Steel M18 M18-1.5 Weld Oxygen Air Fuel Ratio Meter (2 Bungs/2 Plugs)**](https://www.amazon.com/dp/B09LV2BXWK)

HYAT$12.034.5★1643%▼falling

12

![12 Pcs O2 Sensor Bung 304 Stainless Steel M18x1.5 O2 Bung Weld in Oxygen Sensor Bung Stepped Style](https://m.media-amazon.com/images/I/41GcAZR0aCL.jpg) [**12 Pcs O2 Sensor Bung 304 Stainless Steel M18x1.5 O2 Bung Weld in Oxygen Sensor Bung Stepped Style**](https://www.amazon.com/dp/B0F2SFV86M)

HOHNNYREET$22.714.9★1113%▲rising

13

![Oxygen Sensor Adapter for 2-1/4-2-1/2 Clamp-On Wideband Oxygen Sensor Pipe Sensor Bung Adapter Kit for Automotive Exhaust Systems No Weld Design 1 Pack](https://m.media-amazon.com/images/I/41LL+NKTNdL.jpg) [**Oxygen Sensor Adapter for 2-1/4-2-1/2 Clamp-On Wideband Oxygen Sensor Pipe Sensor Bung Adapter Kit for Automotive Exhaust Systems No Weld Design 1 Pack**](https://www.amazon.com/dp/B0DT5PTY6D)

Dairrr Fuuu$23.184.6★543%▼falling

14

![I Little Bamboo O2 Sensor Bung Stainless Steel Oxygen Sensor Mounting Bungs and Plugs M18 X 1.5 Thread Notched Style Oxygen Sensor Fitting Bungs Suitable for 1.5-2 inch Pipe- 2 Bungs/2 Plugs](https://m.media-amazon.com/images/I/41+L2N5U5nL.jpg) [**I Little Bamboo O2 Sensor Bung Stainless Steel Oxygen Sensor Mounting Bungs and Plugs M18 X 1.5 Thread Notched Style Oxygen Sensor Fitting Bungs Suitable for 1.5-2 inch Pipe- 2 Bungs/2 Plugs**](https://www.amazon.com/dp/B0BP1WW789)

I Little Bamboo$13.994.6★2132%▼falling

15

![Oxygen Sensor Bung and Plug Kit 304 Stainless Steel Weld-On Bung with Carbon Steel Screw Plug M18 x 1.5 Thread for Exhaust Fabrication(2 Pack)](https://m.media-amazon.com/images/I/41d6LXVSPaL.jpg) [**Oxygen Sensor Bung and Plug Kit 304 Stainless Steel Weld-On Bung with Carbon Steel Screw Plug M18 x 1.5 Thread for Exhaust Fabrication(2 Pack)**](https://www.amazon.com/dp/B0FWKCW184)

GIroiyai$8.944.8★202%▲rising

**~~Showing 15 of 24 — show all ~~**

## **Product shelf**

All 24 tracked products in this niche.

Top sellersNewestTrending

[![4 Pcs O2 Sensor Bung 304 Stainless Steel M18x1.5 O2 Bung Weld in Oxygen Sensor Bung Stepped Style](https://m.media-amazon.com/images/I/41wW3wOtcmL.jpg)**4 Pcs O2 Sensor Bung 304 Stainless Steel M18x1.5 O2 Bung Weld in Oxygen Sensor Bung Stepped Style** HOHNNYREET**$12.90**4.9★111 reviews](https://www.amazon.com/dp/B0F2SH8RBR) [![Ledaut M18X1.5 Bung and Plug Notched Style (2 Bungs/ 2 Plugs) Notched Style Fitting Bungs M18X1.5](https://m.media-amazon.com/images/I/41dGHEkd3HL.jpg)**Ledaut M18X1.5 Bung and Plug Notched Style (2 Bungs/ 2 Plugs) Notched Style Fitting Bungs M18X1.5** LEDAUT**$13.09**4.7★1,382 reviews](https://www.amazon.com/dp/B01N0DZO12) [![joytrace M18x1.5 Oxygen Sensor Weld Bungs & Plugs Kit (2 Bungs/2 Plugs) - Stainless Steel Welding Adapters](https://m.media-amazon.com/images/I/41XhHJUdYKL.jpg)**joytrace M18x1.5 Oxygen Sensor Weld Bungs & Plugs Kit (2 Bungs/2 Plugs) - Stainless Steel Welding Adapters** joytrace**$10.08**4.8★47 reviews](https://www.amazon.com/dp/B0F2HFZW8T) [![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](https://m.media-amazon.com/images/I/31YGP-rEWKL.jpg)**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**$6.98**4.6★103 reviews](https://www.amazon.com/dp/B0DHPFB17T) [![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)](https://m.media-amazon.com/images/I/41qvHtuEB0L.jpg)**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**$12.41**4.7★182 reviews](https://www.amazon.com/dp/B0DG8ZK8J7) [![JGR O2 Oxygen Sensor Stepped Weld Bungs (5 Bungs/5 Plugs) M18 x 1.5](https://m.media-amazon.com/images/I/41-udpJ5c3L.jpg)**JGR O2 Oxygen Sensor Stepped Weld Bungs (5 Bungs/5 Plugs) M18 x 1.5** JGR**$14.67**4.6★462 reviews](https://www.amazon.com/dp/B07FL8N46B) [![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](https://m.media-amazon.com/images/I/41Ap4Tjfn3L.jpg)**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**$14.09**4.8★54 reviews](https://www.amazon.com/dp/B0FDQX17N6) [![O2 Oxygen Sensor Fitting Plugs or Weld Bungs (10 Steel Stepped Bungs M18 x 1.5)](https://m.media-amazon.com/images/I/41VVhGfg-oL.jpg)**O2 Oxygen Sensor Fitting Plugs or Weld Bungs (10 Steel Stepped Bungs M18 x 1.5)** AMAAM**$20.08**4.8★198 reviews](https://www.amazon.com/dp/B079V4V5JX)

## **Reviews**

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

### **What buyers love **

**Quality-Overall**39%

*“The machining is good quality”*

**Size-Overall**11%

*“Good fit”*

**Value For Money**10%

*“Good deal”*

**Advertised Vs Actual Product**9%

*“Work as they should”*

**Assembly/Installation**6%

*“Easy to install”*

**Efficiency**6%

*“Work good”*

**Material Quality**4%

*“Nice quality stainless steel fittings at an economical price”*

**Ease Of Use**3%

*“It's easy to use”*

**Socket/Port/Plug**2%

*“Plug”*

**Leak-Proof**2%

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

### **What buyers complain about **

**Advertised Vs Actual Product**25%

*“Does not come as package shown”*

**Quality-Overall**19%

*“Trash”*

**Size-Overall**13%

*“it is tight”*

**Sensor**13%

*“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/Corrodes**6%

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

**Heating**4%

*“If you get them too hot”*

**Value For Money**4%

*“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%