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Has anyone worked on any cars dating from 2002-2004. I can use my cable to code 2008 R56, 2010 E90 without issue but when I try to code a 2003 M3, it will not let me. Is the cable not compatible? Do I need to get the serial port cable to work on older cars? In INPA it shows connected as both black but no matter what module I try to read, it fails and says can't connect or read it. Can anyone help me with this?
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