Replacing Nav/Radio system in 2011 SL, will I lose anything (car controls, features, etc)?

[ScottO]

I'm looking at getting an Android Auto double din replacement for our 2011 Nissan Rogue SL (with Bose system).

My first question is: are there any features or controls that I can only access through the OEM Nav/Radio system I currently have? This car is new to us so I'm not entirely familiar with all the settings and options. Are there settings for engine/lights/weather driving, etc. that I'd lose access to?

Last question: I think I read somewhere that the Bose system is built with very low impedance speakers (like 1 ohm) and that I'd likely need to replace all the speakers in order to have the new stereo drive the speakers without blowing up. Is that likely true? Is there an intermediate amp I could get that would fix that issue for like $100 or so?

[Rogue One]

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1) There are no vehicle specific functions that go through the audio system. Rogue SL with Bose has the around view system. Presently I only know of ONE aftermarket head unit that will work. This has been covered.

2) Bose speaker impedance is about 2 ohms. Again this has been covered.