I got a Koyorad and 0 issues with overheating with hard driving! Coolant stays at operating temp no matter what.
Pros: no issues with overheating
Reviews of KOYORAD parts For Business
Average Rating
?
The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
2.8
Manufacturer Ranking
#185
42
Spare Parts
2
Country
Japan
Website
koyorad.co.jp
Spare Parts
Comparisons
koyorad on my 400hp Focus and never had over heating issues.
Pros: no over heating issues
Vehicle:
Ford Focus
I replaced my 2010 factory Calsonic with a Kyorad 2807, there were lots of favorable comments on thenewx forum. 18 months later, still going.
Pros: still going after months
Vehicle:
Nissan
Part number: 2807
I had read about people having good luck with the Kyorad brand so that's what I bought.
Pros: good luck with brand
On my Miata with the factory flawed OEM coolant routing, I run a Koyorad 36mm aluminum radiator with OEM fans and it keeps temps a bit cooler than stock.
Pros: keeps temps cooler
Vehicle:
Mazda
I changed out the intake (noise maker but I love it) then everything that connects so the turbo inlet and bpv, charge pipe and a bigger tmic. A engine that can breath will be healthy.
Pros: engine can breath
Cons: noise maker
This specific spot fails on almost every subaru radiator i have worked on.
If you are lucky KoyoRad still has their sale going, I just got an aluminum radiator from my 97 legacy for $180
Pros: aluminum radiator, good price
Vehicle:
Porsche
The radiator you could go OEM or NVA, but Koyorad is proven solid also.
Pros: proven solid
Vehicle:
Nissan
I went with a Koyorad, but for how much I’ve spent, I should have gone with a crossflow (either Supermiata or Flyin Miata). I also did a coolant reroute, which made me really regret not getting a crossflow
Cons: regret not getting crossflow, perceived poor value
The cap which came on the Koyorad is probably a two way cap. If so it needs to be replaced with a Subaru one way cap.
Cons: wrong cap type, needs replacement
Vehicle:
Subaru
Write your review
Help others - share your experience with this part.
Voted AGAINST engine oil RAVENOL on the rating page
The brake pads OEM Alfa Romeo got the first review!
The brake caliper OEM BMW got the first review!
The brake pads OEM Infiniti got the first review!
For wiper blades PIAA already 100 reviews.
For battery Energizer already 25 reviews.
In the rating best water pump already 12 brands participate!
In the rating best timing belt already 13 brands participate!
In the rating best head gasket already 3 brands participate!
In the auto rating oil filter for Volkswagen Passat already 5 brands participate!
In the auto rating brake pads for Mazda 5 already 10 brands participate!
In the auto rating tires for Subaru Outback already 50 brands participate!
For cabin filter Fram already 25 reviews.
Voted AGAINST engine oil RED LINE on the rating page
Voted AGAINST engine oil PENNZOIL on the rating page
Owner reviews of KOYORAD products
The KOYORAD brand is registered in Japan. Official website: http://www.koyorad.co.jp/ .
In March 2026, PartReview recorded 42 reviews across 2 parts by KOYORAD. Average rating — 2.8 out of 5.
KOYORAD is in the PartReview manufacturers ranking, currently at position 185. Over the last 30 days it dropped by 0 points.
Popular KOYORAD parts
The most popular KOYORAD products on PartReview:
- Engine radiator KOYORAD - 41 review. PR Score — 94, average rating — 4.5.
- Radiator cap KOYORAD - 1 review. PR Score — not available yet, average rating — 1.
Most owner reviews about KOYORAD parts are collected on these pages.
Top-rated KOYORAD parts
KOYORAD achieved top positions in these PartReview part rankings:
- Best engine radiator — ranked 2 among 9 manufacturers. Received 1069 votes.
Comparisons of KOYORAD parts
The most interesting comparisons of KOYORAD with other manufacturers help you see which is better: