Update from dealership: I have caused utter confusion among everyone working here. Half the SA's are saying that they don't do this under warranty. So they called some techs. One tech said he would do it, but two other tech's said they shouldn't do it because there are no codes and I have mods. So, they are now calling a tech from BMWNA.
guy from BMW NA says that no warranty work is done unless there is a light indicating that said work must be done. On top of that, he claimed that an aftermarket charge pipe does affect the intake valves.
Bottom line is that you are not getting this done under warranty unless there is a ridiculous carbon buildup in under 50000 miles that causes misfires or if you have an in at a dealership.
2008 monaco blue e90 335i ZSP|ZPP
Last edited by lilballa; 04-16-2012 at 08:55 AM.