I have a 2011 M8 and I'll be riding say 5 mph and the speedo says I'm going 40 mph or something crazy. The trip meter is way off because of it as well. Is it my speed sensor or gauge or ? Any ideas on how to fix it?
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''the 4 clover nut on the brake side of the drive shaft is not tight or set. if it has any movement it will read many more miles then are real.