I too have a Gen5 Nano 16Gb. Despite the owners manual saying not to use the USB cable that comes with the iPod, it works where the Hyundai cable doesn't. Yeah my car was delivered with that cable. Checking the owner's manual (page 4-121) it points out that the factory cable is only compatible with Gen 1-4. I haven't had any negative effects from using the Apple USB only connector.....yet.