Hello, I have a 1996 328is. Recently, I've had 2 times where I've started up the car and theres some loud whistling/wailing sound, so I turned it off, and then started it up again, and the sound was gone. It never did this before, sounds like a weird noise for my car to make. Any Ideas as to what it could be? or could be a sign of?
A loud whistling sound is usually air getting in or out somewhere it shouldn't. Best thing to do is wait for it to happen again and find where its coming from.
The ONLY Hellrot Red 323 in the world, emmm except for the other few thousand dotted around the world.