4x4 Warning Light on Dash ?

[TerminatorX5]

Originally Posted by X5_Rob

Just got back from the BMW indy shop... interesting twist to the story... It wasn't throwing a code for the 4x4... this guy seemed to know what he was talking about.. he saw codes for my airbag (red airbag dash light is on currently) and also saw a code for my sunroof panel (I just disengaged the 2nd smaller panel as it was stuck open)..

They said they believe the DSC system is not engaging and is the problem... When you push the DSC button to engage or disengage when the car is running nothing is happening... I didn't know to check this but they showed me... THey think that system is not functioning but since its deactivated somehow its not throwing a code... They seemed to know their "BMW" stuff at this shop (and didn't even charge me).. Anything I can do to check the DSC system?

if the DSC module (ABS module) is not communicating, it could be defective, or the plug is disengaged... unless somebody was playing in the vicinity of the plug, there is no reason for the plug to be disconnected.
if the either is true, you would get so called TRIFECA (search for it) of lights and not a single light.

there are repair services on ebay that repair the ABS modules for about $200-300 with lifetime warranty, and there is no charge if they can't... check with them first...
i still don't think it is the ABS module - was your car going into limp mode? did you lose the odometer counting (numbers froze) and/or speedometer stuck at zero? those are the signs of a problem inside the ABS module...

what did he say about the airbag? was it a passenger seat mat? or a seat belt buckle? or head airbag? you did not talk about the airbag before, did it light up while you were at the shop?

sunroof panel is totally independent from the DSC/ABS or the airbag issue.

try this -find a safe place with a decline on a downhill slope, and drive down very slow and engage the Hill Descent Control (totally useless feature, as far as I am concerned, even though I used it successfully climbing down from some steep volcanoes)... If the car engages into the function, your DSC/ABS might be working.. HDC is working at very slow speeds, like 5-15 MPH...

Otherwise lets see what more knowledgable people have to say...