Quote:
Originally Posted by ybbiz34
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.
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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.