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Good day all,

I have a 2003 Z4 2.5i with a HiFi Business CD stock stereo system. Unfortunately, I had an aftermarket subwoofer, amp, and crossover installed that made my stock system sound bad. So I removed all the aftermarket audio and I am trying to put everything back to stock. The only trouble I am having is identifying where some of the cables go.

I have attached two pictures to help show what I am referring to. All of the cables to the right are all of my speaker cables and antenna. The cables to the left I am unsure what they are or where they go. If you have any idea where these go, I would greatly appreciate the guidance. The cables I need help identifying are:

- blue/blue w/white stripe
- red/yellow w/red stripe
- brown
- red w/yellow stripe

Also, I am not sure if this car came with a stock amplifier. Do all Z4's come with stock amps?

Let me know if you have any ideas.

Thank you!

Joe
 

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