MDM button no longer functioning

[VictorH]

I have an E90 M3 owned since new. In the past month the MDM button stopped working. Doesn't really bother me but I still like my stuff to work (I never use it except first run out on the track IF it's raining).
When I check fault codes I get a "MDM receiver fault."

Cleared the fault and it's coming back pretty consistently as now, "MDM Control Module fault." It give me a part number (my Schwaben code reader) 7848125, but I can't find any parts supplier that recognized that number.

Does anyone know
1) Where the MDM control module is located.
2) What is the part number
3) Do I have to code the vehicle for it to work (my guess is yes).

Appreciate your input.

[amrazM]

Are there any faults for the steering switch module

[VictorH]

Originally Posted by amrazM

Are there any faults for the steering switch module

No, there aren't and that unit has been replaced about 20,000 miles ago.

[amrazM]

Mdm is controlled by the switch unit.

[8500RPM]

Maybe the button just died?

[VictorH]

No it says, there is an MDM receiver fault. I would think it's the input to one of the ECUs since MDM is a 100% software function.