I have multiple annoying high pitch noises lol
1. When driving above 3500 rpm under substantial to WOT acceleration, I experience a high pitch noise/ electronic beep sound which became apparent after installation of my Injen Intake, my guess from what others have told me on my thread
http://www.e90post.com/forums/showthread.php?t=565676 is that the intake amplified this sound.
2. Now that its colder - getting below the freezing mark - when I have my heaters on auto running there is this swirling annoying high pitch noise that is associated with them. When I turn off the heaters, the noise is gone...but then I freeze lol.
I've debated taking it to the dealer because I doubt the techs would be able to hear such a minute and subtle sound and it really only becomes noticeable to the person who drives the car on a daily basis