audio will not work if removed

my window says this.....y? the speakers arent connected to it

It means you need a code to reset to the headunit if the stock unit is removed, or loses memory.

Yep, I don't know why someone would steal a stock head unit anyway. If your battery gets disconnected or it loses power in any way you have to type in a 4 digit code to get it to work.

reeeetarded