Engine radiator Koyo or OEM Toyota

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 #8 in ranking

3.4

Leaks

2.3

Overheating

3.8

No data

Reviews

All

Koyo

OEM Toyota

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

OEM Toyota › Engine radiator

Worried_Classic_9573 27 Jul 2023, 16:53

Overheating:

Rating 3.0

Shortly after owning it I had to replace radiator, Dan shroud. Then my power steering rack and CV died. Just recently my master break cylinder just died

Pros: love it

Cons: not a cheap car

Vehicle: Toyota Land Cruiser

OEM Toyota › Engine radiator

CameronsTheName 7 Jan 2026, 21:04

Rating 1.0

I got done years ago for a polished aluminium radiator in a 1985 4th gen Celica.

Vehicle: Toyota Celica

1 2 3 4 5 6 7

Write your review

Help others - share your experience with this part.

Part:

Manufacturer:

Make:

Model:

Generation:

Review tone

Positive Negative Neutral

Reviews found: 0

Voted AGAINST engine oil RAVENOL on the rating page

The brake pads Motorcraft has only 4 reviews. Maybe add one more?

The brake fluid OEM Subaru has only 2 reviews. Maybe add one more?

The brake pads Detroit Axle has only 8 reviews. Maybe add one more?

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!

The glow plug Autolite has only 10 votes! Recommend it?

The fender OEM Volkswagen has only 10 votes! Recommend it?

The brake discs Tesla has only 10 votes! Recommend it?

For cabin filter Fram already 25 reviews.

In the rating best flywheel only 4 brands. Do you know another one?

The brake pads OEM Subaru already has 250 votes!

The engine oil AMSOIL already has 1000 votes!

In the rating best CVT transmission only 4 brands. Do you know another one?

The engine radiator MISHIMOTO already has 300 votes!

Voted AGAINST engine oil RED LINE on the rating page

Voted AGAINST engine oil PENNZOIL on the rating page

Other comparisons

Engine radiator MISHIMOTO or Koyo

Engine radiator MISHIMOTO or Nissens

Engine radiator MISHIMOTO or KOYORAD

Engine radiator MISHIMOTO or Denso

Engine radiator MISHIMOTO or OEM Volkswagen

Engine radiator MISHIMOTO or OEM BMW

Engine radiator Koyo or Nissens

Engine radiator VALEO or MISHIMOTO

Show all

Which engine radiator to choose — Koyo or OEM Toyota?

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 OEM Toyota

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

Which engine radiator are better — OEM Toyota or Koyo?

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

Koyo received a PR Score of 92 out of 100, and OEM Toyota scored 64 points.
Koyo ranked 1 in the overall ranking, and OEM Toyota ranked 8.
The average rating is higher for Koyo (4.4) than for OEM Toyota (3.4).
Engine radiator Koyo have better feature ratings than OEM Toyota:
- Overheating - owners believe, that this property for Koyo is better than OEM Toyota.
- Leaks - drivers claim, that this property for Koyo is outperforms OEM Toyota.
- Sweet smell - reviews suggest, that this property for Koyo is preferred to OEM Toyota.

Which engine radiator are more popular — Koyo or OEM Toyota?

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

By vote balance, engine radiator Koyo surpassed OEM Toyota:

For Koyo, the ratio of positive (160) to negative (13) votes is 147 votes.
For OEM Toyota, the ratio of positive (20) to negative (11) votes is 9 votes.

By number of reviews, engine radiator Koyo surpassed OEM Toyota:

For engine radiator Koyo there are 57 reviews: 52 positive, 2 neutral, 3 negative.
For engine radiator OEM Toyota there are 10 reviews: 6 positive, 1 neutral, 3 negative.

Which engine radiator do car owners prefer — Koyo or OEM Toyota?

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

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

Engine radiator OEM Toyota 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, KOYORAD, Denso, OEM Volkswagen, OEM BMW, VALEO.

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

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.