Engine radiator Koyo or KOYORAD

PartReview Score

Rank #1 in ranking

147

4.4

Leaks

3.6

Overheating

4.5

Sweet smell

5.0

Owners' choice:

Honda S2000

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #2 in ranking

111

4.5

Leaks

2.7

Overheating

4.6

No data

Reviews

All

Koyo

KOYORAD

Koyo › Engine radiator

deathbysnusnu7 20 Jan 2026, 22:17

Overheating:

Rating 5.0

Put a koyo rad in it and it’s been good to go.

Pros: good to go

KOYORAD › Engine radiator

Omega_Eggshell 20 Jan 2026, 21:58

Overheating:

Rating 5.0

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

Koyo › Engine radiator

Sir_J15 20 Jan 2026, 12:58

Overheating:

Rating 5.0

If you go aluminum Koyo is the way to go.

Pros: good aluminum radiator

KOYORAD › Engine radiator

RedhawkST 8 Jan 2026, 22:48

Overheating:

Rating 5.0

koyorad on my 400hp Focus and never had over heating issues.

Pros: no over heating issues

Vehicle: Ford Focus

Koyo › Engine radiator

chevy42083 8 Jan 2026, 22:16

Overheating:

Rating 5.0

I went with Koyo. CARid was the best price at the time. Been 7 years and no issues.

Pros: no issues for years

KOYORAD › Engine radiator

XterraTom 8 Jan 2026, 21:04

Overheating:

Rating 5.0

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

KOYORAD › Engine radiator

benh509 3 Jan 2026, 18:46

Rating 4.0

I had read about people having good luck with the Kyorad brand so that's what I bought.

Pros: good luck with brand

KOYORAD › Engine radiator

PatrickGSR94 27 Dec 2025, 23:50

Overheating:

Rating 4.0

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

KOYORAD › Engine radiator

yobo9193 20 Feb 2025, 17:00

Overheating:

Rating 2.5

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

KOYORAD › Engine radiator

AZ_BikesHikesandGuns 19 Apr 2022, 23:49

Overheating:
Leaks:

Rating 1.0

When I ordered a koyorad I didn’t get this in the box. I sent back what I got from them it was all dented and didn’t fit.

Cons: dented, didn't fit

Vehicle: Toyota 4runner

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Which engine radiator to choose — Koyo or KOYORAD?

If choosing engine radiator across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.

We compare engine radiator across these categories:

Comparison of engine radiator Koyo and KOYORAD

PR Score.
Overall ranking.
Vote balance.
Average rating.
Number of reviews.
Feature ratings.
Car owners’ choice.

Which engine radiator are better — KOYORAD or Koyo?

In March 2026 on PartReview, engine radiator Koyo were overall better than KOYORAD.

Koyo received a PR Score of 92 out of 100, and KOYORAD scored 94 points.
Koyo ranked 1 in the overall ranking, and KOYORAD ranked 2.
The average rating is higher for KOYORAD (4.5) than for Koyo (4.4).
Engine radiator KOYORAD have better feature ratings than Koyo:
- Overheating - owners believe, that this property for KOYORAD is better than Koyo.
- Leaks - drivers claim, that this property for Koyo is outperforms KOYORAD.
- Sweet smell - reviews suggest, that this property for Koyo is preferred to KOYORAD.

Which engine radiator are more popular — Koyo or KOYORAD?

In March 2026 on PartReview, engine radiator Koyo were overall more popular than KOYORAD.

By vote balance, engine radiator Koyo surpassed KOYORAD:

For Koyo, the ratio of positive (160) to negative (13) votes is 147 votes.
For KOYORAD, the ratio of positive (118) to negative (7) votes is 111 votes.

By number of reviews, engine radiator Koyo surpassed KOYORAD:

For engine radiator Koyo there are 57 reviews: 52 positive, 2 neutral, 3 negative.
For engine radiator KOYORAD there are 41 review: 38 positive, 2 neutral, 1 negative.

Which engine radiator do car owners prefer — Koyo or KOYORAD?

In March 2026, according to PartReview, engine radiator Koyo led more car-specific ratings than KOYORAD:

Koyo are chosen by owners of cars such as: Honda S2000, and others.

Engine radiator KOYORAD have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.

Other comparisons of engine radiator

If this comparison didn’t fully answer your question, there are many others on PartReview.

For example, comparisons of engine radiator Koyo with: MISHIMOTO, Nissens, Denso, OEM Volkswagen, OEM BMW, VALEO, OEM Toyota.

Also available: comparisons of engine radiator KOYORAD with: MISHIMOTO, Nissens, Denso, OEM Volkswagen, OEM BMW, VALEO, OEM Toyota.

You can also see who is better among other engine radiator manufacturers: MISHIMOTO or Koyo, MISHIMOTO or Nissens, MISHIMOTO or KOYORAD, MISHIMOTO or Denso, MISHIMOTO or OEM Volkswagen.