Persian_535i

I have the same issue in my vehicle, whistling noise sounds like its coming from the center console / AC vents at high speeds 100+ ... sucks ass.

theXman

It looks like windshield leak is a big suspect. GL Kevin. Hope you get it fixed for good.

Allen

I had a very similar noise on my '95 E34...turned out to be the driveshaft. I would think you do not have enough miles/age on the car for a driveshaft though...but mine sounded just like that and only happened at about >75 mph.

I also had a very similar noise on my E34 AND it happens on my '08 535i. On the E34 it was the driver's side top exterior windshield trim/seal was loose and flapping in the wind...kinda like a reed effect when the wind hit it and it made a "singing" type noise. My '08 535i does the same thing when I get over ~100 mph. Dealer said they "couldn't duplicate"...so I haven't addressed it yet.

You should be able to distinguish if the noise is from the windshield (high up in front) or the driveshaft (sound comes from under the center console).

GoRavens

I have heard that about 3 times on my car... maybe around 110mph. The first time it happened it scared me to death... I thought it was some sort of siren. If I speed up or slow down a little it goes away. It just lasts for 2 seconds or so.

garyg

thats definatly an air leak