Anyhow, purchased the car in April of 2013 as a CPO with 37k miles and I starting modding her as soon as I learned how special our engines really were. She's basically FBO minus exhaust (see part specific details in my footer) and has been FBO since August. Never really noticed the whining before August and lately I've noticed that the Turbo whining is more apparent. Did some quick research and found an ancient thread on bimmerforums containing controversial comments/opinions on if this meant that the turbo was going out. The OP also had N54.
I finally got around to getting the gopro in the car to record the whine noise my turbo has been making.
The Turbo still pulls hard and i'm peaking at 19psi and thus I do not feel it is a boost leak. This is not during low engine temps or low rpm whistle from the n54. Anyone else have a similar noise with n55? Car has 43k miles and has been FBO for 6 months ~7k
2011 e92 335xi - Sport|Nav|Premium|Winter|Convenient
JB 4 G5 | N55 ISO | BMS Intake | BMS DP | BMS Clutch Stop | BMS Cabin Filters | BMS CDV | AA FMIC | FF Adapter - 50% E85 | INPA coded | 19" Breyton GTS