There has been so much written about carbon build up not being covered under CPO warranty and it being a "maintenance" issue. But some have had luck getting the dealer/BMWNA to pay for it. Is SI B11 04 12 (EGR Valve) a separate issue from carbon buildup?
I just came across a thread at BMWCCA referencing the new SI B11 03 14 (walnut shell blasting). Can anyone here confirm it? Is there a PDF floating around? Should we add it to the sticky? See below for source.
https://www.bmwcca.org/forum/index.p...nything.10500/
[EDIT] Found something here on e90post (
http://www.e90post.com/forums/showthread.php?t=983574).