New to this forum, i just picked up a 2006 s40 t5 with 87k miles. So far im loving the car, one question i had is occasionally i hear, what i assume to be some sort of air sound almost sounds like a disk drive spinning from the passenger side.
it guess its intermittent, i dont think its the turbo. Its really hard to pinpoint and exact cause, at first i thought it was A/C related but its happened without it. RPM doesnt affect it I.E. higher RPM doesnt make it sound worse although it does seem to stop after idling for a bit. Its hard to tell because i dont think to look for it i just happen to notice occasionally. Maybe tomorrow ill mess around with a couple of things to see if i can find something the actually causes it.
Seems to be a/c related, i hear for a second after i start the car and it stops pretty quickly but the second i turn the a/c fan it on i can hear it again and it continues for a bit after a turn the ac off. Its not very loud, like i said similar to a disc drive spinning and most road noise cancels it out and you can hear it at all with the radio on.