Quote:
Originally Posted by Sensible_
I don't think it's necessary. And will probably cause you a lot of grief if you are new to it. If you brick your DME then things will be very costly.
I personally have never heard of an BMW software update that corrects a rough idle.
This all points to a mechanical problem.
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Well for example this post:
https://www.e90post.com/forums/showp...09&postcount=7
I think updating software should be positive thing improve over all performance or reset adaptations which could be causing rough idle... But yes, I also believe that its most likely air leak or other hardware issue...
Also its a bit scary to update it myself, I dont want to brick ECU.