Water pump OEM Audi or GRAF

I have the Graf brand on mine, replaced mine at around 120k miles. It’s aluminum and has aluminum impeller also.

I installed one on me 325i 12k miles ago, no issues so far, it was part of the FCP euro water pump kits

6 months and 4000km on mine. Only found out a while after Graf has a bad rep. But no problems with mine yet.

When you do get a pump, buy the entire pump (front and back hemisphere) (like a GRAF brand). If this engine has been moving grit, the rear half of the water pump will be worn more open and not be able to move fluid efficiently.

I own a 2021 S5 with around 55k miles on it, bought it with around 50k miles on it. Only issue is that the water pump did fail and coolant migrated into the vacuum system which is a ridiculously common failure on these cars.

I remember on my S4 the water pump had a plastic impeller that was guaranteed to fail at some point. The aftermarket made one that was metal.

I got lucky and found out my VIN was part of the class action lawsuit for water pumps, got that replaced for free.

Just turned 51K miles and threw an engine light for the first time. Took it straight to the dealer, low boost fault code due to coolant migration from water pump failure. At 51K miles I’m out of warranty with a $7,500 repair bill.

It was the water pump in my case, thankfully under warranty.

I recently had to have my water pump replaced. I had the vehicle diagnosed at the dealer and then had an indie mechanic do the work. Saved me a bunch of cash. Mine wasn’t overheating, but it had leaked coolant into the vacuum system which caused my turbo to not build enough boost.