I have heard that it **should** be possible to install the later type nav system, (with screen nav comp, radio and controller), it would run independent of things like the on board computer and some other bits but it should work.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.