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M340i high pitched sound after hard driving?
Hello!
I have my M340i for about a month now and I've put about 3000 miles on it, runs like a dream, but I've noticed this 3 times already, after I drive it hard and the engine gets hot I hear in the cabin a wierd high pitched sound, like a kettle on the stove or something like that, which doesn't necesarilly seem to have any connection with the rpm I'm at.
Anyone have any ideas what it might be? Thanks for the help!
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