Engine radiator VALEO or Koyo

PartReview Score

Rank #7 in ranking

3.7

Leaks

2.2

Overheating

4.5

No data

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #1 in ranking

147

4.4

Leaks

3.6

Overheating

4.5

Sweet smell

5.0

Owners' choice:

Honda S2000

Reviews

All

VALEO

Koyo

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

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

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

Koyo › Engine radiator

PinkTrunks88 17 Dec 2025, 00:13

Leaks:

Rating 5.0

Radiators aren\u2019t supposed to leak. I have the same Koyo radiator in my NA Z, just put it in this past summer. I def do not have that leak.

Cons: radiator shouldn't leak

Vehicle: Nissan

Koyo › Engine radiator

akep 15 Dec 2025, 11:40

Rating 5.0

Personally I’d be buying a koyo in full aluminum.

Pros: full aluminum

Koyo › Engine radiator

chefsoda_redux 12 Dec 2025, 04:08

Overheating:

Rating 5.0

I went with a Koyo radiator, which is considerably better built than the factory piece, cost less than $300 with new hoses, and took maybe 2 hours, start to finish. Of course, I replaced the coolant at the same time.

Pros: better built than factory

Vehicle: Honda S2000

Koyo › Engine radiator

trackaddict8 8 Dec 2025, 22:51

Overheating:

Rating 5.0

just tested my new koyo hyper V at the track and that thing kept it rock solid cold, 180-203f the entire day but it was like 68 degrees out lol.

Pros: kept it rock solid cold

Koyo › Engine radiator

Zealousideal_Gate_21 24 Nov 2025, 22:57

Rating 4.0

Koyo for top quality, mishimoto for normal quality. Both will do the job well

Pros: top quality

Cons: price higher than Mishimoto

Koyo › Engine radiator

I_Am_A_Zero 22 Jan 2022, 05:19

Leaks:

Rating 2.5

Mine developed a small slow leak out of that nub two weeks after I bought it. Koyo gave me the run around on their warranty, insisting on photos of a destroyed radiator for replacement. I gave up. It’s a shame because it fit awesome and looked great.

Pros: awesome fit, great look

Cons: developed slow leak, poor warranty service

Vehicle: Honda S2000

VALEO › Engine radiator

kemosabe6296 8 Dec 2025, 02:50

Leaks:

Rating 1.0

I was using Valeo radiator for 1-2 years, then it blew hole right under the hose connector.

Cons: blew hole

Vehicle: BMW

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Which engine radiator to choose — VALEO or Koyo?

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 VALEO and Koyo

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

Which engine radiator are better — Koyo or VALEO?

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

VALEO received a PR Score of 74 out of 100, and Koyo scored 92 points.
VALEO ranked 7 in the overall ranking, and Koyo ranked 1.
The average rating is higher for Koyo (4.4) than for VALEO (3.7).
Engine radiator Koyo have better feature ratings than VALEO:
- Leaks - owners believe, that this property for Koyo is better than VALEO.
- Overheating - drivers claim, that by this property VALEO does not differ from Koyo.
- Sweet smell - reviews suggest, that this property for Koyo is preferred to VALEO.

Which engine radiator are more popular — VALEO or Koyo?

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

By vote balance, engine radiator Koyo surpassed VALEO:

For VALEO, the ratio of positive (23) to negative (8) votes is 15 votes.
For Koyo, the ratio of positive (160) to negative (13) votes is 147 votes.

By number of reviews, engine radiator Koyo surpassed VALEO:

For engine radiator VALEO there are 10 reviews: 7 positive, 1 neutral, 2 negative.
For engine radiator Koyo there are 57 reviews: 52 positive, 2 neutral, 3 negative.

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

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

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

Engine radiator VALEO 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 VALEO with: MISHIMOTO, Nissens, KOYORAD, Denso, OEM Volkswagen, OEM BMW, OEM Toyota.

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