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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Hissing (high pitch) noise while driving

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      05-24-2014, 11:58 PM   #23
bsigaroudi
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well, dealer replaced differential with a new one and all is good, no more whining noise!
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      05-25-2014, 07:07 AM   #24
c1pher
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I was thinking you might have gotten a bad engine sound track installed, but who knows. Very mysterious indeed.
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      05-29-2014, 05:43 PM   #25
bsigaroudi
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well, the second diff seem to be defected as well, it sounds grinding :-(
will be taking it in tomorrow to have a test drive with shop foreman. I am getting close to California lemon law.
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      12-26-2014, 06:22 PM   #26
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JS919, thanks for posting the video. I am having the exact same sounds but mine is a 228i so it's the N20 engine here. Anyone in the forum is having the same issue? I just would like to know where that noise is coming from and why.
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