Stock 2018 with 68k. Mine has been solid and a blast to drive. Finally dealing with the water pump issue, but nothing until now.
When I drove a Volvo I just did a belt and water pump every year. OE Aisin one every time.
Aisin is what my shop used when mine started to die at 140k. No problems so far at 150k
Go for Aisin, Toyota just repackages same pump so skip the brand tax.
The pump on my S5 just went out at 50k, almost exactly. $950 for parts and it's actually a pretty simple diy job.
Only have had to do the typical water pump/thermostat (and associated solenoid valves)/motor mounts/lower control arms/oil filter housing gasket.
I used the same kit on my tl and the water pump started leaking 2 years in.
I had a check engine on my SQ7 throwing an under boost code. My brother (a master tech) conferred with a colleague and determined that the water pump was starting to leak and check engine went on because coolant was already finding its way into other components. I wasted no time and just had the work done rather than risk potential bigger issues with turbos etc.
Just had my water pump done on my S4 last week while it was at the dealer for the engine knocking. My Brake pedal was very stiff if the car sat overnight, almost like concrete. The tech found coolant in the vacuum line, the Brake Pedal was losing Vacume and making it extremely stiff after sitting overnight. Turned out my water pump went bad, I never smelled any coolant and did not have any warning lights.
I just replaced the waterpump, thermostat and vacuum system on my B9. Leaked internally into the PCV, I would check the solenoids. Mine has about 68.5k - replaced with the new 6 bolt pump.
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Water pump OEM Audi or OEM Volkswagen
Water pump GRAF or OEM Volkswagen
Water pump AISIN or OEM Volkswagen
Water pump Gates or OEM Volkswagen
Water pump Hepu or OEM Volkswagen
Water pump Pierburg or OEM Volkswagen
Water pump OEM FORD or OEM Volkswagen
Water pump OEM BMW or OEM Volkswagen
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 AISIN were overall better than OEM Audi.
Water pump AISIN and OEM Audi were equally popular according to data in March 2026.
By vote balance, water pump AISIN surpassed OEM Audi:
By number of reviews, water pump OEM Audi surpassed AISIN:
In March 2026, according to PartReview, these manufacturers led the same number of car-specific ratings:
AISIN are chosen by owners of cars such as: Toyota 4runner, and others.
OEM Audi are chosen by owners of cars such as: Audi A4, and others.
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, GRAF, Gates, Hepu, Pierburg, OEM FORD, OEM BMW, OEM Toyota, GMB, Saleri.
Also available: comparisons of water pump OEM Audi with: OEM Volkswagen, GRAF, 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.
