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      01-23-2013, 11:45 AM   #83
NordicBob
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Drives: '16 M4 Sapphire Black metallic
Join Date: Nov 2012
Location: USA

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Quote:
Originally Posted by ybbiz34 View Post
It's the electric cooling fan guys.

I was experiencing the same symptoms. The dealer found some fault codes and saw that the fan was toast.

Dealer replaced the fan and my car has never felt stronger.

The loud fan noise occurred to my 2013 335 M Sport duing a short drive in town. When I stopped at a traffic light it sounded as if a large deisel truck had pulled up next to me. I was shocked when I got home and poped the hood. It was a VERY loud roar. I turned the engine off and then back on. The loud fan noise went away and never came back. I had no fault lights come on the dash when it occurred. I made an appointment with our dealer who said that they found a "fault code" and we're going to replace the fan but had to order the part. I believe that the M-Sport has an extra fan for oil cooling, but forgot to ask the dealer which fan they are goin to replace. When I bring it in at the end of the month when they have the part, I will ask them and report back then.

BTW, I do not know if my car lackd power since I was still in break-in and driving in city streets.
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