i think this might work on u guys carz . Cuz last time i left my car at the body shop to fix the battery up, i think thay unhook all the power cords in there , then leave it for half a day, and then hook them all up again. And the important thing is u have to remember ur code to unlock the CD player in side so , get that code out first then wen u turn on the CD player, i will ask for the code , then just put the code in , then try on some CDs that used to be not working , let see if it works.

and about the code i don know about how u get it , but just call ur dealer. I called mi so they gave me some papper work before get the code.
good luck guys .