Let us know if the new transfer case fixes the "misfire" My dealer told me the same thing last week but I am not 100% confident that they are correct. I am on my 2nd boost sensor in 3 months. The first replacement went bad within a few days of replacement. The new boost sensor fixed 90% of the misfire however it is still not perfect.

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2009 35d, 2006 325i & 330i