Water pump AISIN or GRAF

PartReview Score

Rank #1 in ranking

117

4.0

Leaks

3.3

Noise

3.2

Overheating

3.6

Owners' choice:

Toyota 4runner

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #2 in ranking

3.5

Leaks

3.0

Noise

3.6

Overheating

4.2

Owners' choice:

Reviews

All

AISIN

GRAF

AISIN › Water pump

DennisHakkie 8 Jan 2026, 14:22

Rating 5.0

When I drove a Volvo I just did a belt and water pump every year. OE Aisin one every time.

Pros: OE Aisin

Vehicle: Volvo

AISIN › Water pump

Surkovo20 5 Jan 2026, 17:15

Leaks:
Noise:
Overheating:

Rating 5.0

Aisin is what my shop used when mine started to die at 140k. No problems so far at 150k

Pros: no problems so far

Mileage: 150000 km

AISIN › Water pump

Network_ant 29 Dec 2025, 07:52

Rating 5.0

Go for Aisin, Toyota just repackages same pump so skip the brand tax.

Pros: skip the brand tax

Vehicle: Lexus

AISIN › Water pump

Trident_77 29 Dec 2025, 01:34

Rating 5.0

Aisin pump $67 on rockauto. I know they make a ton of Toyota OEM water pumps, not sure about this specific model.

Pros: OEM water pumps

Vehicle: Toyota

AISIN › Water pump

Unimurph83 11 Dec 2025, 02:56

Rating 5.0

I'd swap them out for multi-layer steel gaskets and new head bolts. Given the engine is in good order and hasn't had a gasket failure yet I'd say you'd be fine skipping the head decking and just install the new gaskets after a good cleaning.

Pros: good order, easy cleaning

Vehicle: Subaru

AISIN › Water pump

rjginca 8 Dec 2025, 01:21

Rating 5.0

Aisin is the maker of Toyota water pumps.

Pros: Toyota water pumps maker

GRAF › Water pump

BMWMikeM 4 Dec 2025, 03:55

Leaks:

Rating 3.0

I've also had a Graf I think it was, it did have a metal impeller, which started leaking after 7 yrs.

Pros: metal impeller

Cons: started leaking after 7 years

AISIN › Water pump

rts-90 25 Jan 2026, 17:44

Leaks:

Rating 2.0

I used the same kit on my tl and the water pump started leaking 2 years in.

Cons: water pump started leaking

AISIN › Water pump

rts-90 18 Jan 2026, 00:32

Rating 2.0

I went with a aisin kit and at the 2 year mark the water pump went.

Cons: water pump failure

AISIN › Water pump

Lxiflyby 16 Dec 2025, 23:51

Leaks:
Noise:
Overheating:

Rating 2.0

The Aisin kits are fine. I would not use a gates kit; the water pumps are junk and so are the tensioners

Pros: Aisin kits are fine

Cons: water pumps are junk

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Other comparisons

Water pump OEM Audi or OEM Volkswagen

Water pump GRAF or OEM Volkswagen

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Show all

Which water pump to choose — AISIN or GRAF?

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

We compare water pump across these categories:

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

Which water pump are better — GRAF or AISIN?

In March 2026 on PartReview, water pump AISIN were overall better than GRAF.

AISIN received a PR Score of 79 out of 100, and GRAF scored 70 points.
AISIN ranked 1 in the overall ranking, and GRAF ranked 2.
The average rating is higher for AISIN (4) than for GRAF (3.5).
Water pump AISIN have better feature ratings than GRAF:
- Noise - owners believe, that this property for GRAF is better than AISIN.
- Leaks - drivers claim, that this property for AISIN is outperforms GRAF.
- Overheating - reviews suggest, that this property for GRAF is preferred to AISIN.

Which water pump are more popular — AISIN or GRAF?

Water pump AISIN and GRAF were equally popular according to data in March 2026.

By vote balance, water pump AISIN surpassed GRAF:

For AISIN, the ratio of positive (159) to negative (42) votes is 117 votes.
For GRAF, the ratio of positive (146) to negative (62) votes is 84 votes.

By number of reviews, water pump GRAF surpassed AISIN:

For water pump AISIN there are 66 reviews: 51 positive, 3 neutral, 12 negative.
For water pump GRAF there are 68 reviews: 46 positive, 4 neutral, 18 negative.

Which water pump do car owners prefer — AISIN or GRAF?

In March 2026, according to PartReview, water pump GRAF led more car-specific ratings than AISIN:

GRAF are chosen by owners of cars such as: Volkswagen Jetta, Volkswagen Tiguan, and others.

AISIN are chosen by owners of cars such as: Toyota 4runner, and others.

Other comparisons of water pump

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

For example, comparisons of water pump AISIN with: OEM Volkswagen, OEM Audi, Gates, Hepu, Pierburg, OEM FORD, OEM BMW, OEM Toyota, GMB, Saleri.

Also available: comparisons of water pump GRAF with: OEM Volkswagen, OEM Audi, Gates, Hepu, Pierburg, OEM FORD, OEM BMW, OEM Toyota, GMB, Saleri.

You can also see who is better among other water pump manufacturers: OEM Audi or OEM Volkswagen, GRAF or OEM Volkswagen, AISIN or OEM Volkswagen, Gates or OEM Volkswagen, Hepu or OEM Volkswagen.