Dead iDrive Controller

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Well-known member
Nov 10, 2018
Symptoms: No lights. No response from the head unit to the center console controller. Head unit responds to all other inputs from the steering wheel and dash.

Checked / tried:
  • Fuses
    12V/5V at the connector
    Disconnect/isolated RoadTop Unit
    Reset miscellaneous unrelated codes
    Coded to force a reboot
    Reset overnight with 12V disconnect
    Replaced iDrive controller

What I have not checked, and is the only thing left I can think to look at is the 'touchbox' unit under the rear seat. Honestly, I didn't know that even existed until today, so checking the connections seems appropriate as well.

Any other ideas? I'm at a loss for where to go from there beyond throwing money at the service department.