Originally Posted by e90pilot
My original water pump when out at 5000mi. The second went out at 175,000 mi. The second one had a different part number. There have been more than one revision to these. Also, I'm having a different issue with the water pump. Mine will go into low power mode if I push the car hard. I read a service bulletin about it and it said it's one of three issues: Insufficient ground, insufficient voltage, or faulty water pump. It's a new water pump and the freeze frame info says 14V when the error occurred. So I'm guessing it's insufficient ground due to the wires getting old from heat cycling and building resistance. It might be what's causing the water pump to fail. Check for codes before replacing. Also check this SB: SIB120405. It outlines the steps to check the wiring for proper voltage and resistance.
Thanks for the info. Its very interesting. Maybe its also due to extreme weather conditions who knows lol...
All I know is that whenever this happens to me, I am not going to take it to a dealership, rather to straight to my garage, buy the parts and DIY. Well.. my friend the BMW tech will be there to help me and pay a fraction for for labor I hope...