interesting ideas guys. thanks.
yes i do have CA and i did have the key in my pocket but i'd be surprised if it were related to that ... sounded too close to the engine and down low.
i guess it could be some cooling mechanism but i hadn't driven for an hour...although things were warm/hot under the hood still ...
:iono: thnx!
it makes me feel better that others hear it too ... as long as it's normal!
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e90 M3, Space Gray / Extended Black, ZCP, ZCV, ZP2, DCT
sold: 2008 BS 135i 6MT
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