Does the original 2013 Liana navigation system have a reverse camera?

That's impossible, mine has a screen and a reversing camera, plus it can play CDs. I replaced the camera this year because it was too blurry to see anything.

Replace the Nissan's screen.

There is no navigation system. The CD players come in two models: one is Panasonic, and the other is a Desay unit rebranded as Liana.

The 2013 model doesn't have it either; it's just a CD player without navigation. So, if you need it, you can install it yourself.

No, this car has very basic features, so the reverse camera function wasn't included at that time.