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Thought I'd post my experience updating a 2010 E90 M3. I had a bitch of a time figuring it out, but in the end, we got it to work. The first method, I logged in using "root" and pw "cic0803", and it allowed me to download the "generalPersistencyData_DiagnosticSWTControlle r", but after generating the FSC code, it kept giving me the incorrect code error. After re-trying this method a few times, I tried the 3rd method and logged in anonymously instead. Pulled the "data03" file instead. Edited it in the same method as described to create the 1b file. Generated a different FSC code and this time it worked.
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