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 6% 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
Competition
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%
Open market
31%
- GM GENUINE PARTS35%
- Bosch9%
- Motorcraft8%
- YijiaLink7%
- DNA MOTORING6%
- YIUIY5%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 34 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
Ywdiml 4PCS Car Glow Plug Socket Set 8mm 10mm 12mm Vehicle Glow Plug Extractor Kit with 3/8 Dr T-Bar Automotive Repair Accessories Universal for Automobile Motorhome Truck
Ywdiml$11.702 rev
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
Koruidar 8Pcs 12639701 Diesel Glow Plug Compatible with 2006-2016 Express Silverado and Savana Sierra 8 Cyl 6.6L Diesel Replaces 97364968
Koruidar$24.140 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
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★
Koruidar 8Pcs 12639701 Diesel Glow Plug Compatible with 2006-2016 Express Silverado and Savana Sierra 8 Cyl 6.6L Diesel Replaces 97364968
Koruidar$24.140.0★
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★
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×
Reviews
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”