[335i-zac]

Does anyone know what this box is for. I think it is connected to a wiring harness behind my dash that I found when doing a screen swap. I am having issues with the aux connection not producing any sound coudl this be related to that?

Any advice or wisdom is appreciated.

I am referencing the rusty looking box

[oVeRdOsE.]

Satellite radio I believe

[ctuna]

Could be a DAB you made the picture to big it's hard to tell .
The modules are usually labeled with a part no and some kind
of functional name . Use Mdecoder.com to see what the options
are/

[335i-zac]

Originally Posted by ctuna

Could be a DAB you made the picture to big it's hard to tell .
The modules are usually labeled with a part no and some kind
of functional name . Use Mdecoder.com to see what the options
are/

This is what I found on mdecoder so I shoudl have the ability to use an aux

[ptpending]

according the options list you provided,
your AUX is now routed to the MULF2HIGH module, it is under the TCU.
if any of these 3 modules will fail, it will break the MOST loop (green fiber wire) and communications from MULF2HIGH to headunit will be disrupted.

[335i-zac]

Originally Posted by ptpending

according the options list you provided,
your AUX is now routed to the MULF2HIGH module, it is under the TCU.
if any of these 3 modules will fail, it will break the MOST loop (green fiber wire) and communications from MULF2HIGH to headunit will be disrupted.

Am I right in thinking the mulf2high box is located under the long box on the right in the photo?

[335i-zac]

Originally Posted by ptpending

according the options list you provided,
your AUX is now routed to the MULF2HIGH module, it is under the TCU.
if any of these 3 modules will fail, it will break the MOST loop (green fiber wire) and communications from MULF2HIGH to headunit will be disrupted.

Could one of those boxes being broke be related to this error code?