I do have a Nissan Versa 2012 but when I shut off the car and remove the key the radio stays on . Please advise.

As far as I'm aware some of the newer cars have the radio wired to have a "delayed" turn off. Like, for instance, my friend's '11 Maxima will still play the radio after his car is turned off, but once you open the door it turns off (as is the case in just about any other car I've experienced this with). Your options are that (if this is intended by the maker) you can ignore it, it's suppose to happen :); or get the radio rewired to turn off when the key is removed. If it's not suppose to be a feature for your car, then you have a short somewhere. I do believe it is intended though, and you shouldn't worry.

Thank I will try that.

the only nissans that stay on like that are the 14+ rogues. all others shut off as soon as key shut off. Could be a radio or bcm issue. Bring to dealer.