I recently bought a replacement stereo for my wifes rav4 off Ebay, iI believe it is from a Hilux or Prado. pzq60-00031 is the serial number on it. It is the 6 disc changer with bluetooth. It seems the PIN given to me by the seller is incorrect, is there a way around it with out going to a Toyota dealer, and would they help me anyway as it is not original equipment? Also how many attampts do I get before I'm locked out for good?