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Originally Posted by JCL
BMW don't even make the transmissions, why not poll ZF or GM? It appears that there have been failures from the transmisison sensors and control boxes (which BMW does make). Maybe the poll should read, have you had any electrical gremlins, and if so, did they impact your transmission? Also, do you drive aggressively and might you have contributed to any early-hour transmission failure? Without that information, this doesn't have a lot of significance IMO. I think the above factors have more impact than whether or not the fluid was changed, as I haven't seen any reports correlating transmission fluid changes with failures.
It is interesting, though, that the first 15 votes were people with no failures, supported the theory that failures get lots of notice and vehicles without failures carry on quietly. 1st rule of internet forums.
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As far placing blame goes.. pointing a finger at GM-france or ZF is silly. How many components in any it's vehicles do you think BMW actually manufactures? I'll bet you in any vehicle, BMW only manufactures the 5 C's in the engine and the body/frame itself, if that; everything else is sourced. When a balljoint or swaybar end-link fails, you don't go after the guy who made it. As soon as BMW purchases a part from a supplier, and you buy the vehicle, the accountability is on them.
We don't actually know that all the failures have occurred due to sensor failure. Even so, all the sensors are inside the transmission in contact with the fluid. Imo, it's wise to change the fluid every 30k miles from the birth of these vehicles. Cheap insurance if you plan on keeping it for a while.