I'm voting for no issue with the wiring harness because I don't believe my issues will be solved by pushing for a replacement. These are the issues I have. Cold start issue, where after sitting a day, car will run very rough or not start at all the first time I try, even after letting fuel pump cycle 2-3 times. Slightly rough shift from 2 to 3 when cold, usually only once and then is fine. Won't engage 4th when downshifting, occurred 4 times in one road trip of 700 miles. Car was up to temp driving highway speed, slowed down to about 45 mph while in non sport and full automatic mode, hit the gas to accelerate back up to speed, tries to downshift to 4, never engages as if in neutral, the engine red lines, released gas pedal, up shifts to 5 and re-engages.
Those are my issues to date that I've brought to my dealer and they've looked into and have said bring the car back if they get worse. The issues are livable, so I'm not overly worried.