I bought a battlefield 3 game for xbox 360 and the online pass code won't work

@delsleys,

The online pas has been discontinued and it is no longer needed to play online games. More information can be found in this article:

https://help.ea.com/en/article/online-pass-has-been-discontinued/

Please note that should you still be asked for an online pass, you can download one for free in the Microsoft Store.