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      09-22-2012, 02:24 PM   #5
Private First Class

Drives: E93 328i
Join Date: Oct 2010
Location: York, PA

iTrader: (0)

Originally Posted by RentonTDI View Post
Quick question from a noob on water pump replacement:

I just bought a 2009 328i xDRIVE with semi-high mileage, and I'm going to be replacing the water pump, thermostat, radiator hoses, reservoir tank, and do a coolant flush.

BUT, I'm wondering if the e90 M3 water pump is compatible with this engine? And if so, is it worth purchasing over the stock water pump?

As background, I just noticed the M3 water pump on Turner's site, and it mentions an 'upgraded aluminum impeller' - I don't know if this would improve reliability...see links below.

M3 e9x water pump:

Regular e9x water pump:
I have 140K on my vert and it runs like a top. No issues whatsoever. So far I put a set of tires and brakes on it with oil changes every 10K. I think you're blowing a huge nut for nothing.

I plan on doing a belt and plugs in the near future. Rear brakes are due again. That's about it.