Currently running a fvp, which is just a gmb, and it works great.
Pros: works great
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I've been running the aluminum GMB pump (1301280AL on Rockauto) on the 455 in my '72 Bonneville for about 5 years now with no problems.
Pros: no problems, 5 years reliable
Part number: 1301280AL
I have 20-25k miles on a GMB pump now and it hasn't leaked a drop. We'll see how long it goes, but so far I'm happy with it.
Pros: no leaks, reliable performance
Mileage: 32000 km
Me and various others I know have used GMB water pumps before with no issues.
Pros: no issues
I been running a Gmb pump for couple thousand miles now. Super cheap on rock auto, they also sell a high performance one. I bought both
Pros: super cheap
I usually use rock auto and get the gmb outlander pump.
Vehicle:
Mitsubishi Outlander
I checked the old water pump and took it out by removing the front plate of the engine... The old water pump moves fine but it does make a squeaking noise and is quite old however it does move.
Cons: squeaking noise, quite old
Vehicle:
Chrysler LHS
Mileage: 160934 km
GMB is a decent pump.
Pros: decent pump
I put in a GMB in my '02 two years ago, and it's leaking already.
Cons: leaking, short lifespan
Vehicle:
BMW
I replaced both mine and my dad's with GMB. Mechanic recommend it too. So far so good.
Pros: good performance
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What we know about GMB water pump
The brand is registered in Japan.
In March 2026, PartReview users have a positive opinion of GMB water pump.
PR Score — 85 out of 100, based on 15 reviews and 47 votes. 12 positive reviews, 2 neutral reviews, 1 negative review. Average rating — 4.2 (out of 5). Vote balance: 40 up, 7 down.
In the ranking of the best water pump this part is at position 6, behind OEM BMW and Pierburg , but ahead of OEM Toyota and Saleri.
Users also evaluated the qualities of GMB water pump:
- Leaks - coolant traces around the pump or from the weep hole - rated positively. 4.1 points out of 5.
- Noise - whine or growl coming from the pump area - rated positively. 3.7 points out of 5.
- Overheating - temperature rises, especially with the a/c on - rated positively. 4 points out of 5.
Water pump GMB in car-specific ratings
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Water pump GMB in comparisons
There are 11 comparisons of GMB water pump with other manufacturers on PartReview.
In particular, see which water pump are better: OEM Toyota or GMB, GMB or OEM Volkswagen, GMB or Pierburg, GMB or Hepu, GRAF or GMB .