Engine radiator MISHIMOTO or KOYORAD

PartReview Score

Rank #5 in ranking

3.5

Leaks

2.8

Overheating

4.1

Sweet smell

5.0

No data

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

MISHIMOTO

KOYORAD

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

MISHIMOTO › Engine radiator

manzin82 20 Jan 2026, 18:17

Leaks:

Rating 5.0

I got a Mishimoto with zero issues and fitment was spot on

Pros: zero issues, spot on

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

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

MISHIMOTO › Engine radiator

Keith_13 3 Jan 2026, 23:51

Overheating:

Rating 4.0

And don't put the oem radiator in (it sucks). A mishimoto is 2/3 the price, will last longer (it's not made of plastic at the top -- that's why the oem ones fail) and it will actually keep your engine a little cooler.

Pros: lasts longer, keeps cooler

Cons: oem ones fail

Vehicle: Subaru Impreza

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

MISHIMOTO › Engine radiator

Coupe368 2 Mar 2025, 17:42

Leaks:

Rating 2.5

The crap-tastic mishimoto MMRAD-E36-92 that I use these days do come with a lifetime warranty and I send them photos of the leak and they just send me a replacement in a week or so. I have purchased 6 of them and replaced 2 under warranty. The "Z3" raditator won't fit as its too thick, but the Z3 IS and e36 so its confusing.

Pros: lifetime warranty, easy replacement

Cons: crap-tastic, pinhole leaks, poor welds, Z3 fitment issues

Vehicle: BMW

Part number: MMRAD-E36-92

MISHIMOTO › Engine radiator

LolPandaMan 20 Feb 2025, 18:32

Overheating:

Rating 3.5

They're fine. They're one step above oem imo

Pros: one step above OEM

Vehicle: Mazda

MISHIMOTO › Engine radiator

TwOhsinGoose 28 Jan 2026, 17:59

Leaks:

Rating 1.0

My mishimoto radiator sprung a leak after 1.5 years in my F150. So good luck.

Cons: sprung a leak

Vehicle: Ford

MISHIMOTO › Engine radiator

Ok-Fish-9244 19 Dec 2025, 06:16

Overheating:

Rating 2.0

Get a csf or koyorad. Mishimoto isn’t that great

Cons: not that great

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Which engine radiator to choose — MISHIMOTO 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 MISHIMOTO 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 MISHIMOTO?

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

MISHIMOTO received a PR Score of 65 out of 100, and KOYORAD scored 94 points.
MISHIMOTO ranked 5 in the overall ranking, and KOYORAD ranked 2.
The average rating is higher for KOYORAD (4.5) than for MISHIMOTO (3.5).
Engine radiator KOYORAD have better feature ratings than MISHIMOTO:
- Leaks - owners believe, that this property for MISHIMOTO is better than KOYORAD.
- Overheating - drivers claim, that this property for KOYORAD is outperforms MISHIMOTO.
- Sweet smell - reviews suggest, that this property for MISHIMOTO is preferred to KOYORAD.

Which engine radiator are more popular — MISHIMOTO or KOYORAD?

Engine radiator MISHIMOTO and KOYORAD were equally popular according to data in March 2026.

By vote balance, engine radiator KOYORAD surpassed MISHIMOTO:

For MISHIMOTO, the ratio of positive (195) to negative (105) votes is 90 votes.
For KOYORAD, the ratio of positive (118) to negative (7) votes is 111 votes.

By number of reviews, engine radiator MISHIMOTO surpassed KOYORAD:

For engine radiator MISHIMOTO there are 95 reviews: 55 positive, 15 neutral, 25 negative.
For engine radiator KOYORAD there are 41 review: 38 positive, 2 neutral, 1 negative.

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

In March 2026, according to PartReview, engine radiator MISHIMOTO and KOYORAD have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.

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 MISHIMOTO with: Koyo, Nissens, Denso, OEM Volkswagen, OEM BMW, VALEO, OEM Toyota.

Also available: comparisons of engine radiator KOYORAD with: Koyo, 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 Denso, MISHIMOTO or OEM Volkswagen, MISHIMOTO or OEM BMW.