E46Fanatics - View Single Post - Noise under the bonnet (Hood)
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Old 12-13-2012, 03:21 AM   #11
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Join Date: Dec 2012
Location: Guildford, UK
Posts: 2
My Ride: 320Ci (2004)
Noise under the bonnet

Thanks for the suggestions. Applying a process of elimination: It's not the A/C and it doesn't go off after 30 seconds so not secondary air pump.

Looking at Icoleman's diagram it's coming from an area slightly further back in the engine compartment than the number "8".

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