You can install an aftermarket navigation unit. You would need the head unit, new face plate, and wiring adapter. I wouldn't think that trying to retrofit the OEM 10 year old navigation would be cost effective, easy, or worth it.
I am personally fine with my Sony Premium Sound setup with SYNC and my phone in a cradle, but since I am looking for another Fusion for my household, I have looked into adding a Carplay friendly setup, and there are some options out there.
I am personally fine with my Sony Premium Sound setup with SYNC and my phone in a cradle, but since I am looking for another Fusion for my household, I have looked into adding a Carplay friendly setup, and there are some options out there.