I was at my dealer today picking up some brake rotors for my e39... I asked them how long the electric water pumps last. I told them a friend of mine with an early ('08 or '09) 335i just had his water pump die at 90K miles. And they said... of course... at anything over 60K miles and your on borrowed time. So.... I think 60K or 70K is gonna be when I change mine.
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