I stopped in last night to grab some fuel system cleaner. The SA said it was carbon build up if I only felt it under light engine load on the highway. She said to run 1 to 2 bottles of cleaner through it, and all should be good. The Westgate would be throwing a SES light, plus 2009 is when BMW started putting the upgraded Westgates on to get rid of any Westgate problems.
'09 335i xDrive Coupe - Space Grey / Black Leather / Alum. Trim / Sport / Premium / 18'' wheels / Cold Weather / CA / Nav / iPod / Logic 7 / PPK1