[dhh222]

Folks,

I guess I am wondering if this is just my car or a issue with iPhones in general. When using the factory aux in and a iPhone 4 or 4S there is a persistent high pitched whine (almost like a ground loop or engine noise from the old days) although it doesn't change pitch with engine speed when listening to music (iPod function) - doesn't seem to affect phone usage.

I have tried 3 different iPhone 4 and 4S - It does not happen with a standard iPod or the 3GS. Tried different cables, etc. No change.

I have a 08 750Li - and don't know anyone else with close to that model to ask - thanks for any info.