ac relay
Skip itA small market ($41K/yr) — this niche doesn't clear our bar today.
Review moat
Good547.93avg incumbent reviews — the moat a new listing must climb
Price range
Good$6.86–$35.78cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good$14.47avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Returns
Good2.9%return rate — above 6% kills the launch gate
Conversion
Okay3.6%search→purchase rate — share of searches ending in a sale
Brand share
Okay79%top-5 brand share — brands hold most of the demand
Growth
Okay+11.6%90-day search growth — must beat 0% to launch
Competition
Bad73%top-5 click share — a locked-up shelf
Market size
Bad$41K$41K/yr · 79K searches
Competition
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.Brands
13 falling
Sellers
35
Top-5 brand share
79%
Open market
16%
- ecocstm41%
- KVAEY14%
- FASTSTORM9%
- GM GENUINE PARTS9%
- ACDelco6%
- Ronybuy5%
- Open — no brand owns it (7 brands, 16%)
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 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
4 PCS Relays 5 Pin Relay 40A Waterproof Car Relays 12V Relay Switch for Electric Cooling Fans Motor Starters Automotive Taillights
ecocstm$8.524.3★302 rev
KVAEY 2 PCS Car AC Relay G8HL-H71 4 Pin Multiple Use Power Relay Assembly Fan Relay Automotive Starter Relay Compatible with Accord Element Civic CR-Z CR-V Car Accessories (2 PCS)
KVAEY$6.864.2★150 rev
FASTSTORM Electric Fan Relay Kit 12V 60 AMP Electric Radiator Cooling Waterproof Fan Relay Kit with Thermostat Control Switch 185 On 175 Off Upgrade
FASTSTORM$21.444.6★125 rev
GM Genuine Parts 13500114 Multi-Purpose Relay
GM GENUINE PARTS$9.354.6★901 rev
2 PCS Electric Fan Relay Kit Dual Electric Fan Relay Kit 185 On 175 Off Thermostat Switch 40A Relays 12V Cooling Radiator Fan Relays Wiring Kits for Replacing Faulty Wiring Truck Engine Cooling
ecocstm$20.844.4★42 rev
Newest
by launch date
PAIYUE 4PCS Fan Relay Car Accessories 4 Pins Car AC Relay Automotive Replacement Starter Relays Air Conditioning Compressor Relays Replace OEM G8HL-H71-12VDC Apply to Air Conditioning Fan Headlight
PAIYUE$8.9912 rev
yorpyep 4 PCS 5 Pin Relay DC 12 V 30 A Multi-Purpose Oil Pump Air Conditioning Fan Relay Heavy Duty Accessories Waterproof Housing Plug and Play Motor Replacement for Most Cars Trucks (Black)
yorpyep$8.008 rev
2 PCS Electric Fan Relay Kit Dual Electric Fan Relay Kit 185 On 175 Off Thermostat Switch 40A Relays 12V Cooling Radiator Fan Relays Wiring Kits for Replacing Faulty Wiring Truck Engine Cooling
ecocstm$20.8442 rev
FASTSTORM Electric Fan Relay Kit 12V 60 AMP Electric Radiator Cooling Waterproof Fan Relay Kit with Thermostat Control Switch 185 On 175 Off Upgrade
FASTSTORM$21.44125 rev
KVAEY 2 PCS Car AC Relay G8HL-H71 4 Pin Multiple Use Power Relay Assembly Fan Relay Automotive Starter Relay Compatible with Accord Element Civic CR-Z CR-V Car Accessories (2 PCS)
KVAEY$6.86150 rev
Trending
90-day click momentumPAIYUE 4PCS Fan Relay Car Accessories 4 Pins Car AC Relay Automotive Replacement Starter Relays Air Conditioning Compressor Relays Replace OEM G8HL-H71-12VDC Apply to Air Conditioning Fan Headlight
PAIYUE$8.994.0★
yorpyep 4 PCS 5 Pin Relay DC 12 V 30 A Multi-Purpose Oil Pump Air Conditioning Fan Relay Heavy Duty Accessories Waterproof Housing Plug and Play Motor Replacement for Most Cars Trucks (Black)
yorpyep$8.003.4★
Ronybuy 4-PIN 12V DC IP65 Waterproof Relay with Harness 40/30 AMP Relay Switch - Heavy Duty 12&16 AWG Tinned Copper Wires SPST Automotive Relay Kit for Horns Starters Radiator Motor Fans Pack of 1
Ronybuy$9.604.6★
FASTSTORM Electric Fan Relay Kit 12V 60 AMP Electric Radiator Cooling Waterproof Fan Relay Kit with Thermostat Control Switch 185 On 175 Off Upgrade
FASTSTORM$21.444.6★
2 PCS Electric Fan Relay Kit Dual Electric Fan Relay Kit 185 On 175 Off Thermostat Switch 40A Relays 12V Cooling Radiator Fan Relays Wiring Kits for Replacing Faulty Wiring Truck Engine Cooling
ecocstm$20.844.4★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +11.6% search growth over the last 90 days.Peak months: Jun, Jul, Aug · busiest ÷ quietest = 1.9×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Quality at a fair price”
“Worth it”
“Works as Intended”
“Very easy, hook up and use”
“Works great”
“fit perfect”
“they feel much more substantial than the standard non-waterproof versions”
“Excellent relay and socket”
“Fan motor assembly did the trick”
“Heater”
What buyers complain about
“Also they are significantly shorter than the original”
“Does NOT fit a 2006 Honda CR-V”
“Didn't work”
“Switch is junk”
“Falsely advertised”
“Not worth the price”
“Failed in 4 days”
“After having tap the hole in the side of my block a little bigger for the sensor to fit Wired everything up according to the directions Had nothing”
“blows them so I had to use 25 amp”
“Thermal switch lasted one heat cycle on truck”