BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST - View Single Post - Whistling sound at 1700-2000RPM

F30330D · 10-26-2021, 02:44 AM

Check your breather pipe for splits/cracks and oil residue. Mine started making this noise and that was the cause for me.

10-26-2021, 02:44 AM	#6
F30330D New Member 0 Rep 9 Posts Drives: BMW F30 330D Join Date: Oct 2021 Location: Aberdeenshire iTrader: (0)	Check your breather pipe for splits/cracks and oil residue. Mine started making this noise and that was the cause for me.
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