There is a TSB out for this concern, but engineering is still working on the issue. It further states there is not yet a fix for the issue and do not attempt any repairs. "Stay tuned for updates", it goes on to read ...."UNTIL A NEW SERVICE PROCEDURE AND/OR PARTS ARE AVAILABLE DO NOT ATTEMPT REPAIR. MONITOR ##### FOR UPDATES."
Personally, I heard it was a shortage of several certain parts and they were releasing the vehicles as the parts came in and were put on the cars.
don't know for sure, though.