coolant reservoir tank
Worth a lookShows a sweet-spot price point ($28.54 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Avg price
Incredible$28.54avg listing price — sweet spot $15–$100
Price range
Great$14.00–$57.10cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Great$984K$984K/yr · 957K searches
Review moat
Good525.21avg incumbent reviews — the moat a new listing must climb
Competition
Good44%top-5 click share — leaders hold, buyers still browse
Brand share
Okay78%top-5 brand share — brands hold most of the demand
Conversion
Okay3.6%search→purchase rate — share of searches ending in a sale
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Returns
Okay3.5%return rate — above 5% kills the launch gate
Growth
Bad-6.2%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, coolant reservoir tank is a $984K/yr Amazon United States market (957K searches/yr). The top 5 brands hold 78% of demand. Verdict: Worth a look — 56/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
coolant reservoir tank market data
- Units sold / yr
- 30K–40K
- avg 750–1,000/product
- Revenue / yr
- $856K–$1.1M
- units × avg price
- Conversion rate
- 3.6%
- Avg BSR
- #88
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 90%
- Out of stock
- 0.2%
- Avg brand age
- 39 months
- Avg seller age
- 169 days
Competition & brand share
The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.Brands
17 falling
Sellers
80
Top-5 brand share
78%
Top 20: 100%
Top-5 click share
44%
Top 20: 81%
Open market
18%
- EVIL ENERGY40%
- Dorman20%
- A-Premium7%
- YEYETUO6%
- RYANSTAR RACING5%
- PYHAUTO4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -6.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top coolant reservoir tank search terms
- coolant reservoir tank421K/yr
- coolant overflow tank76K/yr
- coolant reservoir112K/yr
- radiator overflow tank47K/yr
- coolant tank34K/yr
- overflow tank28K/yr
- coolant expansion tank25K/yr
- radiator reservoir tank30K/yr
- reservoir tank25K/yr
- deposito de anti congelante25K/yr
Top coolant reservoir tank 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
EVIL ENERGY Coolant Overflow Tank Aluminum Radiator Tank Reservoir Expansion Tank Universal 1L Black
EVIL ENERGY$31.734.6★1,093 rev
EVIL ENERGY Coolant Overflow Tank Radiator Overflow Bottle 800ml Aluminum Universal Black
EVIL ENERGY$26.004.6★813 rev
Dorman 603-001 Universal Fluid Reservoir with Cap
Dorman$14.004.5★2,487 rev
RYANSTAR Universal car Radiator Coolant Tank 800ml Coolant Expansion Tank Overflow Oil Catch Tank Cooling Catch Bottle Reservoir Aluminum Billet Black
RYANSTAR RACING$19.534.6★851 rev
Coolant Overflow Tank 800ml Aluminum Radiator Overflow Tank Black Coolant Radiator Reservoir for Cars
YEYETUO$18.184.6★132 rev
Newest
by launch date
Coolant Overflow Tank Aluminum Coolant Reservoir Tank 1L Black Radiator Reservoir Expansion Tank for Universal Cars
YEYETUO$19.1839 rev
Coolant Overflow Tank Aluminum Coolant Reservoir Tank 1L Universal Reservoir Expansion Tank Black
Cesilili$19.7893 rev
MTRPS 1L Coolant Overflow Tank Aluminum Radiator Expansion Tank Recovery Water Tank Bottle Universal Engine Cooling System Reservoir Compatible with Most Cars Trucks Boats (Silver)
MTRPS$30.298 rev
Engine Coolant Reservoir Tank Coolant Expansion Reservoir Tank with Cap Compatible with Silverado 1500 Tahoe Sierra 1500 Yukon Escalade 2014 2015 2016 2017 2018 2019 2020 Replace# 603-973 22856231
PYHAUTO$38.86104 rev
22870828 Engine Coolant Reservoir Tank with Cap Compatible with Silverado 1500 Sierra 1500 Suburban Tahoe Yukon Escalade 2007-2013 Coolant Overflow Tank Replace 603-054
PYHAUTO$36.72123 rev
Trending
90-day click momentumMTRPS 1L Coolant Overflow Tank Aluminum Radiator Expansion Tank Recovery Water Tank Bottle Universal Engine Cooling System Reservoir Compatible with Most Cars Trucks Boats (Silver)
MTRPS$30.293.3★
FGJQEFG 2 x 10 Inches Universal Radiator Coolant Overflow Puke Tank Bottle Catch Can Polished Stainless Steel with Twist Cap 12 Ounces
FGJQEFG$23.174.5★
EVIL ENERGY Coolant Overflow Tank Radiator Overflow Bottle 800ml Aluminum Universal Black
EVIL ENERGY$32.094.5★
A-Premium - Universal Coolant Reservoir Tank Bottle with Cap - Universal fits Universal White Coolant Overflow Tank/Expansion Tank - (7.64 in x 4.13 in x 6.54 in)
A-Premium$16.024.6★
EVIL ENERGY Radiator Coolant Overflow Tank Coolant Recovery Tank 1L Aluminum Universal
EVIL ENERGY$31.534.6★
What buyers say about coolant reservoir tank
What buyers praise and complain about, mined from review topics.What buyers love
“Amazing craftsmanship”
“Direct fit”
“Good kit for installing”
“Worth the money”
“As advertised”
“Nice coolant recovery tank”
“Works well”
“Material firme”
“Great value, doesn't leak,”
“design was very good”
What buyers complain about
“Leaked”
“poor quality control”
“Did not mount”
“Does not fit like said”
“Does not last”
“Did not fit my application”
“It may have said silver paint that I overlooked in the details”
“the seal leaked coolant immediately”
“Defective from manufacturer”
“Level sensor doesnt reach pins - connects just fine on previous well that is exact same length”
Top return reasons
Common questions
- Is coolant reservoir tank profitable to sell on Amazon United States?
- The niche generates $984K/yr across 39 tracked products. 3 of 5 products launched in the last 360 days are still selling. 90-day search growth is -6.2%. Flapen's verdict: Worth a look (56/100).
- How competitive is the coolant reservoir tank niche?
- 17 brands and 80 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 78% of demand.
- What do buyers complain about in coolant reservoir tank?
- Top complaints mined from reviews: Leak-Proof, Quality-Overall, Mounting. The return rate is 3.5%.
- When does demand for coolant reservoir tank peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the coolant reservoir tank niche?
- Listings span $14.00–$57.10; the average listing price is $28.54 (sweet spot $15–$100). The average incumbent carries 525 reviews — the moat a new listing must climb.