BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > DIY Guides and Instructions > F20 nbt retrofit usb and sound issues
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      01-31-2020, 06:51 AM   #1
M135imike
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F20 nbt retrofit usb and sound issues

Hey people!

Recently fitted nbt to my f20 m135i which had business nav, Bluetooth etc , I think it may be CIC? Possibly wrong

But I’m having issues with my USB port and the sound.

The USB port in the armrest charges my phone, but doesn’t show in the multimedia menu on the screen etc.

And the sound only works if I have my engine running, not while ignition only is on?

Anyone that can shed some light on these issues and a resolution would be great!!
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      02-22-2020, 07:22 PM   #2
plurant
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if retrofited from cic to nbt, you need to buy a usb cable from ebay and re route it to the nbt directly. CIC uses the combox for the central usb port. and keeping the combox pluged in in the most loop and can bus will lead to isues.
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      02-23-2020, 09:35 PM   #3
M135imike
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Quote:
Originally Posted by plurant View Post
if retrofited from cic to nbt, you need to buy a usb cable from ebay and re route it to the nbt directly. CIC uses the combox for the central usb port. and keeping the combox pluged in in the most loop and can bus will lead to isues.
That's nothing to do with my sound issue , I've resolved it now, needed to tap into the ignition wire of the amp and put into fuse box, works fine now
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      03-14-2020, 09:21 AM   #4
doobrey
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Guys, I am new the forum!

Just saying HI!
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