I have a 2004 TL without navigation and my CD player has taken a crap.

I found someone selling a CD player/6 disc changer from a 2006 TL with navigation. Does anyone know if it would still be compatible with my car?

They have different part numbers.

2004 without navigation part number: 39100-SEP-A00ZA
2006 with navigation part number: 39100-SEP-A41ZA

 

It's not just going to be plug and play. But it's possible.

If you don't want to take the project on, I would search for the tuner assembly at various salvage yards. Good luck!

But check these out:
https://acurazine.com/forums/3g-tl-audio-bluetooth-electronics-navigation-94/my-non-navi-navi-conversion-05-tl-622349/
https://acurazine.com/forums/3g-tl-audio-bluetooth-electronics-navigation-94/im-soo-excited-just-completed-my-non-navi-navi-conversion-diy-included-747456/