Most of us know that the water pump is a particularly weak point in the inline six motors and many fail during ownership.
I have set up a survey to attempt to get a decent prediction of when you can expect them to fail.
If you have a car (1-series, 3-series, 5-series, z4) with either the N52 or N54 engine, please vote!
Vote in this thread:
http://www.e90post.com/forums/showthread.php?t=807187
I will keep updating the statistics as we get more responses.
Thanks!