Requires a different wiring harness to keep navigation screen. I have the same issue.
Nope.
For audio, power and steering wheel controls, it uses the same connectors, just some of the wires might need to be re-pinned.
The different connectors are; there is an extra connector, that wouldn't be used, and the connector for the radio antenna is different.
its 2 plugs combined into 1 connector. It basically has 2 antennas for the radio, only one of them needs to be connect (the one with the ground in the last photo).
Base BK1 stereo
infiniti/JBL/premium BK1 Stereo (some regions have the stereo rebranded as JBL. they are the same company)
BK1 Nav