---
title: "Knock Sensor — $356K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/knock-sensor"
last_updated: "2026-08-10T16:06:23.516Z"
locale: en
meta:
description: "Niche score 61/100 · $356K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 61/100 · $356K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Knock Sensor — $356K/yr Amazon US Niche (2026) - Flapen"
---
# **knock sensor**
**Worth a look**
Shows a sweet-spot price point ($28.15 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 54Growth 20Conversion 47Competition 90Returns 29Price range 58Avg price 95Brand share 83Review moat 90Quality gap 83
**Avg price**
**Incredible****$28.15**
avg listing price — sweet spot $15–$100
**Competition**
**Great****25%**
top-5 click share — an open shelf
**Review moat**
**Great****199.16**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Great****52%**
top-5 brand share — no brand owns this niche
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Price range**
**Good****$8.18–$153.94**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$356K**
$356K/yr · 337K searches
**Conversion**
**Okay****3.8%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Okay****4.7%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-10.3%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United States niche tracking, knock sensor is a $356K/yr Amazon United States market (337K searches/yr). The top 5 brands hold 52% of demand. Verdict: Worth a look — 61/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **knock sensor market data**
- **Units sold / yr**
- **15K–20K**
- avg 100–250/product
- **Revenue / yr**
- **$422K–$563K**
- units × avg price
- **Conversion rate**
- **3.8%**
- **Avg BSR**
- **#127**
- **Page quality**
- **0%**
- **Prime**
- **99%**
- **Sponsored**
- **73%**
- **Out of stock**
- **3.7%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **156 days**
## **Competition & brand share**
Clicks spread well past the top 5 (25% combined) — an open shelf where new products get seen.
**Brands**
**43 **▼falling
**Sellers**
**142**
**Top-5 brand share**
**52%**
Top 20: 86%
**Top-5 click share**
**25%**
Top 20: 56%
**Open market**
**42%**
- GM GENUINE PARTS14% - A-Premium12% - Gledewen10% - Dorman8% - Delphi7% - TRQ5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -10.3% search growth over the last 90 days.
7K5KSpike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/us/automotive/knock-sensor/trend)
## **Top knock sensor search terms**
- **knock sensor**244K/yr-10.2%2.7% conv. - **knock sensor harness**24K/yr-8.6%2.8% conv. - **knock sensor kit**21K/yr-22.7%1.9% conv. - **knock sensors**10K/yr-15.8%2.3% conv. - **gm genuine knock sensor**4K/yr+25.0%2.3% conv. - **automotive replacement detonation sensors**4K/yr-14.6%1.7% conv. - **oem knock sensor**5K/yr+10.6%1.3% conv. - **sensor de detonacin**5K/yr-11.5%1.7% conv. - **ls knock sensor**4K/yr-6.8%9.1% conv. - **knock sensors 5.3**4K/yr+14.7%3.9% conv. [**All search terms **](https://flapen.com/research/us/automotive/knock-sensor/search-terms)
## **Top knock sensor 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.
0%2%$7K4%$14K6%$21K8%$28K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**GM Genuine Parts 213-3521 (12589867) Ignition Knock (Detonation) Sensor**GM GENUINE PARTS**$54.97**4.4★2,253 rev](https://www.amazon.com/dp/B000K02EDG) [2**Dual Knock Sensors with Wiring Harness Kit | Knock Sensor 5.3 for Chevy Suburban Silverado Avalanche Tahoe GMC Sierra Yukon Cadillac Hummer & More GM Vehicles | Replace# 12601822 12589867 917-033**Gledewen**$22.09**3.6★1,657 rev](https://www.amazon.com/dp/B07Q2KFRQS) [3**GM Genuine Parts 213-1576 (12623730) Ignition Knock (Detonation) Sensor**GM GENUINE PARTS**$13.58**4.7★734 rev](https://www.amazon.com/dp/B000C9GGBG) [4**Delphi AS10017 Ignition Knock (Detonation) Sensor**Delphi**$37.73**4.0★619 rev](https://www.amazon.com/dp/B000CGHTC4) [5**30530-PPL-A01 Ignition Knock Detonation Sensor for Honda Accord Civic CR-V/CRV Element & Acura RDX RSX TSX Replace 158-0917 30530PPLA01 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012**RICHWEI**$16.56**4.2★196 rev](https://www.amazon.com/dp/B0BMB1WLFW)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**A-Premium Ignition Knock Detonation Sensor Compatible with Hyundai & Kia Vehicles - Santa Fe 2010-2012 2019-2020 Sonata 2007-2019 Tucson Forte Optima Sorento Sportage & More Replace# 392502G100**A-Premium**$20.81**17 rev10mo ago](https://www.amazon.com/dp/B0FNMVFC4D) [**HiSport 89615-B6010 Knock Sensor and Harness Kit - Compatible with Toyota Corolla FJ Cruiser Highlander Matrix Sequoia Sienna Avalon Camry Land RAV4 Tacoma Venza Yaris 4Runner Tundra Solara**HiSport**$24.66**52 rev1y ago](https://www.amazon.com/dp/B0DKMNYY6T) [**Knock Sensors Wiring Harness and Intake Manifold Gasket Kit for Chevy Suburban Silverado Avalanche Tahoe GMC Sierra Yukon for Cadillac & More GM Vehicles | Replace# 12601822 12589867 917-033**JOYOJUMA**$31.39**137 rev1y ago](https://www.amazon.com/dp/B0DJQZRQVF) [**Gseigvee 1 PC Car Knock Sensors ABS Sensor Replacement Number 22060-7B000 220607B000 KS107 2 Pin Plug and Play Ignition Knock Sensor Standard Accessories Compatible with Most Cars (Black)**Gseigvee**$15.23**38 rev1y ago](https://www.amazon.com/dp/B0DF7JMZ8Q) [**Dual Knock Sensors with Wiring Harness and Intake Manifold Gasket Kit | for Chevy Silverado Avalanche Tahoe GMC Sierra Yukon Cadillac Hummer & More GM Vehicles | Replace# 12601822 213-3521 89060413**Gledewen**$33.89**251 rev1y ago](https://www.amazon.com/dp/B0DCBDS359)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Dorman 926-084 Knock Sensor And Harness Kit Compatible with Select Models**Dorman**$59.14**3.6★**▲ 294%**](https://www.amazon.com/dp/B07QNLP9XJ) [**30530-PPL-A01 Ignition Knock Detonation Sensor for Honda Accord Civic CR-V/CRV Element & Acura RDX RSX TSX Replace 158-0917 30530PPLA01 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012**RICHWEI**$16.56**4.2★**▲ 121%**](https://www.amazon.com/dp/B0BMB1WLFW) [**A-Premium Ignition Knock Detonation Sensor Compatible with Hyundai & Kia Vehicles - Santa Fe 2010-2012 2019-2020 Sonata 2007-2019 Tucson Forte Optima Sorento Sportage & More Replace# 392502G100**A-Premium**$20.81**4.5★**▲ 102%**](https://www.amazon.com/dp/B0FNMVFC4D) [**GM Genuine Parts 12729597 Knock Sensor**GM GENUINE PARTS**$21.94**4.8★**▲ 67%**](https://www.amazon.com/dp/B0CY1ZVL7Z) [**Beck/Arnley 158-1017 Knock Sensor**Beck/Arnley**$76.72**4.4★**▲ 55%**](https://www.amazon.com/dp/B0063OR3C0)
**~~View all trending →~~**
## **What buyers say about knock sensor**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**23%
*“Awesome fit”*
**Quality-Overall**16%
*“Affordable quality”*
**Advertised Vs Actual Product**12%
*“Works as it should”*
**Value For Money**10%
*“Excellent price”*
**Assembly/Installation**8%
*“Easy to install”*
**Efficiency**7%
*“Perfectly functional”*
**Functionality-Overall**4%
*“this thing corrected my problem”*
**Durability**3%
*“Durable like it should be”*
**Correct Contents**2%
*“It had the correct part number on it”*
**Leak-Proof**1%
*“No more leaks”*
### **What buyers complain about **
**Sensor**37%
*“Faulty sensor”*
**Quality-Overall**14%
*“Bad quality”*
**Durability**9%
*“Will break”*
**Functionality-Overall**8%
*“Didn't work out of box”*
**Compatibility-Overall**7%
*“States it didnt fit my vehicle”*
**Defective Material/Parts**5%
*“Part did not work”*
**Assembly/Installation**4%
*“is difficult to install”*
**Size-Overall**2%
*“Won't fit”*
**Connectivity-Overall**2%
*“Wasn't good connection cut 2 new ones in”*
**Value For Money**1%
*“with the high price of gas”*
### **Top return reasons **
**Sensor**33%
**Size-Overall**14%
**Compatibility-Overall**11%
**Functionality-Overall**10%
**Defective Material/Parts**10%
**Value For Money**4%
**Advertised Vs Actual Product**4%
**Connectivity-Overall**2%
**Assembly/Installation**2%
**Socket/Port/Plug**2%
## **Common questions**
- **Is knock sensor profitable to sell on Amazon United States?**
- The niche generates $356K/yr across 99 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -10.3%. Flapen's verdict: Worth a look (61/100).
- **How competitive is the knock sensor niche?**
- 43 brands and 142 sellers compete. The top 5 products take 25% of clicks and top 5 brands hold 52% of demand.
- **What do buyers complain about in knock sensor?**
- Top complaints mined from reviews: Sensor, Quality-Overall, Durability. The return rate is 4.7%.
- **When does demand for knock sensor peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the knock sensor niche?**
- Listings span $8.18–$153.94; the average listing price is $28.15 (sweet spot $15–$100). The average incumbent carries 199 reviews — the moat a new listing must climb.
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