I have a 2002 325i and the DSC, ABS and Brake light are on, but my concern is that I don't known how fast I going. I purchase a scanner and is telling me a faulty internal control unit. 5DF5. is driving me crazzzzyyyyyyyyyy.
I believe the right hand rear abs sensor drives the speedometer. That should sort out your issue if you replace it with a good OE brand.
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