glow plug
Skip itSoft demand (-33.9% this quarter) — this niche doesn't clear our bar today.
Avg price
Incredible$32.39avg listing price — sweet spot $15–$100
Review moat
Great228.91avg incumbent reviews — the moat a new listing must climb
Price range
Great$10.14–$112.98cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good44%top-5 click share — leaders hold, buyers still browse
Brand share
Good65%top-5 brand share — brands hold most of the demand
Returns
Good2.4%return rate — above 5% kills the launch gate
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Conversion
Okay2.8%search→purchase rate — share of searches ending in a sale
Market size
Bad$53K$53K/yr · 59K searches
Growth
Bad-33.9%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, glow plug is a $53K/yr Amazon United States market (59K searches/yr). The top 5 brands hold 65% of demand. Demand peaks in Jan–Dec. Verdict: Skip it — 49/100.
Data updated Jul 11, 2026 · scored weekly · How we score niches
glow plug market data
- Units sold / yr
- 3K–3K
- avg 0–100/product
- Revenue / yr
- $81K–$97K
- units × avg price
- Conversion rate
- 2.8%
- Avg BSR
- #199
- Page quality
- 0%
- Prime
- 91%
- Sponsored
- 68%
- Out of stock
- 3.0%
- Avg brand age
- 52 months
- Avg seller age
- 172 days
Competition & brand share
The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.Brands
20 falling
Sellers
52
Top-5 brand share
65%
Top 20: 100%
Top-5 click share
44%
Top 20: 82%
Open market
31%
- GM GENUINE PARTS35%
- Bosch9%
- Motorcraft8%
- YijiaLink7%
- DNA MOTORING6%
- YIUIY5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -33.9% search growth over the last 90 days.Peak months: Jan, Dec · busiest ÷ quietest = 1.9×
Top glow plug 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
GM Genuine Parts 9G (12639701) Glow Plug (Pack of 1)
GM GENUINE PARTS$20.034.7★1,749 rev
GM Genuine Parts 68G (12690238) Glow Plug
GM GENUINE PARTS$32.564.6★89 rev
8 PC Motorcraft ZD-11 F4TZ-12A342-BA Glow Plugs 1995-2003 Ford 7.3 Liter
Motorcraft$103.814.6★885 rev
3-Pack Hot Spark Glow Plug N4 No.4 70117 Compatible with Kyosho HSP HPI Redcat 1/8 1/10 RC Nitro Engines Car Truck Buggy
YijiaLink$14.104.3★183 rev
DNA MOTORING Set of 8 Glow Plugs Compatible with 04-10 E350/E450 04-05 Excursion 04-07 F250F350/F450/F550 Super Duty V8 Diesel / 6.0L Turbo Diesel Models 8Pcs OE Style Glow Plug ZTL-H-0007
DNA MOTORING$24.624.9★48 rev
Newest
by launch date
12639701 Diesel Glow Plugs 9G Compatible with 6.6 Duramax Chevy GMC LBZ LLY LML LMM LGH 2006-2016 Silverado Sierra 2500HD 3500HD Express Savana 2500 3500 Replace# 97364968
Krimocy$29.997 rev
12639701 Glow Plugs 9G Compatible with 6.6 Duramax Chevy GMC LBZ LLY LML LMM LGH Diesel Silverado Sierra 2500HD 3500HD Express Savana 2500 3500 2006-2016 Replace# 97364968 05613738 8 PCS
GDUKOP$32.9118 rev
Ensun 68460484AB Diesel Glow Plug Dual Coils Compatible with 2014-2019 Grand Cherokee 6 Cyl 3.0L Diesel 2014-2018 Ram 1500 6 Cyl 3.0L Diesel 2019 Ram 1500 Classic
Ensun$39.028 rev
YIUIY 8PCS Glow Plugs 2001-2004.5 Compatible with Chevy GMC Duramax 6.6 LB7 Diesel for Silverado Sierra Replace 97226202
YIUIY$37.7920 rev
UBOG 4PCS Glow Plug Removal Tool Glow Plug Remover Kit Car Accessories Glow Plug Socket Set Glow Plug Extractor Kit with 3/8 T-Bar Easy Replacement and Removal of All Popular Glow Plugs
UBOG$18.5533 rev
Trending
90-day click momentum
3-Pack Hot Spark Glow Plug N3 No.3 70117 Compatible with Kyosho HSP HPI Redcat 1/8 1/10 RC Nitro Engines Car Truck Buggy
YijiaLink$13.704.3★
12639701 Diesel Glow Plugs 9G Compatible with 6.6 Duramax Chevy GMC LBZ LLY LML LMM LGH 2006-2016 Silverado Sierra 2500HD 3500HD Express Savana 2500 3500 Replace# 97364968
Krimocy$29.994.5★
3-Pack Hot Spark Glow Plug N4 No.4 70117 Compatible with Kyosho HSP HPI Redcat 1/8 1/10 RC Nitro Engines Car Truck Buggy
YijiaLink$14.104.3★
CrazyHobby 70117 Hot Glow Plug No.3 N3 Spark Nitro Engine Parts Replace OS 8 for Traxxas HPI HSP Kyosho 1/8 1/10 RC Car Truck Buggy (Pack of 6)
CrazyHobby$26.024.3★
YIUIY 8PCS Glow Plugs 9G Replace 12639701 97364968 Compatible with Chevy GMC Duramax 6.6 Diesel for Silverado Sierra Savana Express 06-16 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
YIUIY$33.004.3★
What buyers say about glow plug
What buyers praise and complain about, mined from review topics.What buyers love
“fit perfect”
“Excellent price”
“Easy to install”
“Works as advertised”
“Great quality replacement”
“Works perfectly”
“Work good glow fine”
“The first set I ordered seems durable”
“This glow plug socket set is a great value and includes three essential sizes: 8mm, 10mm, and 12mm, covering the most common glow plug applications”
“But they work”
What buyers complain about
“Cheap”
“One died after the first start”
“It doesn't come with a battery”
“all 3 were not working they are a cheap piece of crap”
“not as advertised”
“They do not fit LLY”
“it just overall seemed very weak”
“Item did not maintain a reading of less than 1 Ohm”
“Item did not maintain a reading of less than 1 Ohm”
“Not for LLY”
Top return reasons
Common questions
- Is glow plug profitable to sell on Amazon United States?
- The niche generates $53K/yr across 34 tracked products. 0 of 4 products launched in the last 360 days are still selling. 90-day search growth is -33.9%. Flapen's verdict: Skip it (49/100).
- How competitive is the glow plug niche?
- 20 brands and 52 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 65% of demand.
- What do buyers complain about in glow plug?
- Top complaints mined from reviews: Quality-Overall, Durability, Battery Inclusion. The return rate is 2.4%.
- When does demand for glow plug peak?
- Demand peaks in Jan–Dec; the busiest month runs 1.9× the quietest.
- What does it cost to enter the glow plug niche?
- Listings span $10.14–$112.98; the average listing price is $32.39 (sweet spot $15–$100). The average incumbent carries 229 reviews — the moat a new listing must climb.