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.
'14 435i xDrive Coupe