E46Fanatics - View Single Post - Noise under the bonnet (Hood)
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Old 12-12-2012, 11:12 AM   #2
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Join Date: Dec 2012
Location: Germany
Posts: 128
My Ride: 323i
Originally Posted by Posh View Post
Having switched the ignition on without starting the engine there is a sound under the bonnet (rather like a Computer cooling fan). Is this normal? I've had the car from new (2004) and never noticed it before.

Any suggestions?
I just asked this same question a couple days ago and didn't get a firm answer. Seems like others have it as well. Does it turn off after a while or keep going? Does it continue for a bit after you remove the key? If so this is the same sound I have on my 323i, It seems to be comming from the throttle body area.
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