1. Yes, you just need the cable as well. You buy it as a kit normally. Check forum sponsor JKU.com.au or carsystems.pl
2. Yes, you can remove the dealer fitted BT module. It will be either behind the climatronics control or stuffed between the headunit cage and glovebox.
3. Yes. I had a Fiberdyne/Mobridge unit dealer fitted. Quite good but no A2DP support (track/artist info and skipping from wheel controls).
4. Yes, I replaced above unit with 9w7. Happy days.
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