I'm having issues with my 6MT, similar to this...
BMW seem to think that replacing 3 fuel injects, the NOX sensor and the spark plugs will resolve the issue... but at $3250, I think I want to get options from a few people and decide from there... If it was just $500 thats fine, but 3250 is a bit of a waste if it doesnt fix the issue.
Problem is my car isn't throwing any issues.
I've already replaced all the coils (under the "product enhancement" scheme with BMW).
Guess I will just have to try replacing the cheapest parts first and see if that fixes it.. I have a set of spark plugs and the tool to remove them coming next week.