block heater cord
Skip itSoft demand (-90.5% this quarter) — this niche doesn't clear our bar today.
Price range
Great$14.66–$39.19cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$21.82avg listing price — sweet spot $15–$100
Review moat
Great253.67avg incumbent reviews — the moat a new listing must climb
Returns
Good2.7%return rate — above 6% kills the launch gate
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Conversion
Bad1.1%search→purchase rate — share of searches ending in a sale
Competition
Bad83%top-5 click share — a locked-up shelf
Market size
Bad$8K$8K/yr · 34K searches
Growth
Bad-90.5%90-day search growth — must beat 0% to launch
Competition
The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 rising
Sellers
19
Top-5 brand share
89%
Open market
5%
- Zerostart25%
- VANORM24%
- X4XZ21%
- Tecreddy13%
- LDCRE7%
- DVPARTS6%
- Open — no brand owns it (1 brand, 5%)
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 9 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
VANORM Replacement Cordset Cord for Heavy Duty Immersion Heaters and Engine Block Heaters 6-feet 120 Volts Compatible with Dodge Ram Cummins Diesel and Ford F250 350 - Block Heater Cord
VANORM$19.804.7★284 rev
X4XZ 120V Engine Block Heater Cord 251919 with Cap for Ford Powerstroke Diesel E350 450 550 F250 F350 F450 F550 Dodge Ram 2500 3500 Cummins Diesel 5.9 6.7L Heavy Duty Immersion Heaters 6 Feet
X4XZ$16.954.8★27 rev
Zerostart 3600008 Replacement Cordset for Heavy Duty Immersion Heaters and Engine Block Heaters 6-feet | 120 Volts
Zerostart$32.674.8★1,212 rev
Zerostart 3600006 Auto and Light Truck Replacement Cordset for Freeze Plug Engine Block Oil Pan and Transmission Heaters 5-feet | 120 Volts
Zerostart$21.594.4★320 rev
6Ft 16AWG Engine Block Heater Cord 84303149 19301659 Compatible with 2001-2018 6.6 L Duramax Diesel Engine Chevy GMC 2500 3500
Tecreddy$17.804.8★19 rev
Newest
by launch date6Ft 16AWG Engine Block Heater Cord 84303149 19301659 Compatible with 2001-2018 6.6 L Duramax Diesel Engine Chevy GMC 2500 3500
Tecreddy$17.8019 rev
IXMGA 84564686 90 Inches Engine Coolant Heater Cord
IXMGA$39.1921 rev
X4XZ 120V Engine Block Heater Cord 251919 with Cap for Ford Powerstroke Diesel E350 450 550 F250 F350 F450 F550 Dodge Ram 2500 3500 Cummins Diesel 5.9 6.7L Heavy Duty Immersion Heaters 6 Feet
X4XZ$16.9527 rev
120V Block Heater Cord 251919 for Dodge Ram 2500 3500 Cummins 1989-Current 5.9 L /2007-Current 6.7 L for 95-16 Ford 6.0 6.4 7.3 Powerstroke Engine Block Heaters 68409910AB 3600008
LDCRE$15.5357 rev
120V Block Heater Cord for Heavy Duty Immersion Heaters and Engine Block Heaters 6-feet 16AWG Compatible with Ford F250 F350 and Dodge Ram 2500 Cummins Diesel
Tecreddy$18.1898 rev
Trending
90-day click momentumX4XZ 120V Engine Block Heater Cord 251919 with Cap for Ford Powerstroke Diesel E350 450 550 F250 F350 F450 F550 Dodge Ram 2500 3500 Cummins Diesel 5.9 6.7L Heavy Duty Immersion Heaters 6 Feet
X4XZ$16.954.8★
120V Block Heater Cord 251919 for Dodge Ram 2500 3500 Cummins 1989-Current 5.9 L /2007-Current 6.7 L for 95-16 Ford 6.0 6.4 7.3 Powerstroke Engine Block Heaters 68409910AB 3600008
LDCRE$15.534.9★
IXMGA 84564686 90 Inches Engine Coolant Heater Cord
IXMGA$39.194.6★
Zerostart 3600006 Auto and Light Truck Replacement Cordset for Freeze Plug Engine Block Oil Pan and Transmission Heaters 5-feet | 120 Volts
Zerostart$21.594.4★
DVPARTS 120V Heater Cord 251919 for Ford 7.3 6.0 6.4 6.7L F350 250 F250
DVPARTS$14.664.6★
Demand
Weekly Amazon search volume, last 30 weeks — -90.5% search growth over the last 90 days.Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fits perfect”
“Works as advertised”
“Well worth the money”
“Easy to install”
“Great quality for the price”
“Fits my 6.7 Cummins very nicely works fantastic”
“Works well”
“The materials feel durable”
“Great coolant heater cord”
“the plug in is right there”
What buyers complain about
“Cord is much longer than what I needed using the way I am”
“the cord feels thick”
“misleading pics”
“I could not be easier to install although I found it very tough to tighten down the retaining nut because there is little to no room to get a wrench into”
“Unusable trash”
“the plug to engine heater plug is very loose”
“Plug not very strong/tight”
“Loose connection”