04-08-2005, 07:40 PM
I got my 535i out of storage last week and i started hearing a humming sound when the car is at idle. When the rpm's get up it stops. I opened the hood and could not hear the hum and i believe it is coming from the area under the drivers seat. I have not noticed anything else odd and i think it could be a vacuum leak. Anyone else have any ideas or suggestions?