How to remove .mp3 extension from Song Title?

Simple question how do I remove file extension .MP3 from showing in the songs title? For some reason every song I've played in new my vehicle shows the file extension in the title song field. How do I edit the ID3 tag songs in ITunes from showing the words MP3 in the title display.

Is this a question about iTunes? Then please go to their forum.

You should check the following:
Do the files actually have any information in the tags?
Is the player capable of reading tags?

To me it looks as though the player simply takes the filename either because it does not read tags of because the tags are not filled.