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Originally Posted by Alongat
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Ok, foremost you will definitely require coding to even attempt to use E90 Ind amp to your setup. Check out youtube clips on coding and understand the process. Can be learned, but make no mistake in rushing to learn it. Take your time.
Since you already purchased e90 amp and if you are really obsessed in getting good quality audio in your setup, i can suggest this:
Get the wiring loom from the same guy.
Check behind the headunit, there should be fiber optics behind your headunit. See if its connected, otherwise connect it.
Code NBT with Indv audio config (frankly, im not sure if you can code it as the retrofit would have used some protocol decoder module, im not sure if you are able to write code back to the headunit. Someone else who has experience please chime in)
I can see the taped fiber above your black hifi - meaning car was provisioned for CD-Changer or someone removed the cd-changer unit.
Use that fiber to connect e90 amp. Get the wiring diagram for the individual amp, power it externally with 12V. Check if you are getting signal /light. Using the wiring loom that you got, just connect one of the Indv speaker that and see if youre getting sound. If you do, congrats, that amp works and you can safely take apart the car to install the new wiring looms and speakers.
If you cant, well you have to troubleshoot further. This is why i didnt even consider retrofitting NBT, because all other dependencies like amp etc. Potential screwups, so many unknowns.