7Post - 7 Series Forum - View Single Post - Proud new owner of a 2010 750Lix M-sport with a few concerns and questions

bruno787 · 04-02-2012, 06:47 AM

the whining noise could be caused by a defective belt pulley.

my 740 is due for a fix soon, and my previous benz also had this problem. seems common among the plastic pulleys being used nowadays on newer engines.

04-02-2012, 06:47 AM	#2
bruno787 Private First Class 19 Rep 143 Posts Drives: 23 735i Join Date: Sep 2009 Location: Philippines iTrader: (0)	the whining noise could be caused by a defective belt pulley. my 740 is due for a fix soon, and my previous benz also had this problem. seems common among the plastic pulleys being used nowadays on newer engines.
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