Get a pierburg if you can for the water pump. They’re more OEM than Mehle is for water pumps even though both are OE manufacturers.
Graf here. 15k miles/ 2 years, no problems.
I use on my 12v and 24v VR6 engines, Eurowise aluminum thermostat housing and 42DD stainless steel crack pipe. Water pump I use GRAF or Hepu for its metal impeller.
If it *is* leaking you might want to consider replacing it with a Graf alloy-bodied pump which won’t be affected by heat and exposure to oil, the usual causes of eventual failure of the plastic pumps.
Pierberg all aluminium has been good in mine.
I replaced mine with a pierburg one. after install it was fine till I hit a decent bump, which led to overheating limp mode (i stopped the car as soon as this happened).
I've also had a Graf I think it was, it did have a metal impeller, which started leaking after 7 yrs.
what I had problems with is with Graf water pump, that was included as part of FCP euro cooling system kit, water pump seal around the bearing started pouring coolant like a waterfall after only 11k miles, I replaced it with a Stewart pump
when my original pump went bad, i went to Peirburg so that the plastic housing wouldnt crack. Pump lasted about 20,000 miles, bought another one from fcp euro for the lifetime warranty but this one lasted 20 mins before i got those same codes and overheated.
I've had 2 of these die in less than 1 year. Junk!
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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:
In March 2026 on PartReview, water pump GRAF were overall better than Pierburg.
In March 2026 on PartReview, water pump GRAF were overall more popular than Pierburg.
By vote balance, water pump GRAF surpassed Pierburg:
By number of reviews, water pump GRAF surpassed Pierburg:
In March 2026, according to PartReview, water pump GRAF led more car-specific ratings than Pierburg:
GRAF are chosen by owners of cars such as: Volkswagen Jetta, Volkswagen Tiguan, and others.
Water pump Pierburg have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of water pump GRAF with: OEM Volkswagen, OEM Audi, AISIN, Gates, Hepu, OEM FORD, OEM BMW, OEM Toyota, GMB, Saleri.
Also available: comparisons of water pump Pierburg with: OEM Volkswagen, OEM Audi, AISIN, Gates, Hepu, 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.
