Quote:
Originally Posted by smassey321
Was coding required to correct speedometer?
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I think speed is measured from the wheel sensors. So changing the diff ratio won't affect the speedometer but changing the overall tire diameter would.
You could still do coding to make your speedo accurate. Most if not all BMW speedometers are very optimistic from the factory. Both my 335d and x35d are 3-4 mph off at 70 according to gps.