Graphic is only an example. There may be differences in specific details depending on engine version.
Unscrew all bolts.
Remove underbody panelling (1).
Installation note: Make sure underbody panelling (1) is correctly seated.
BMW X3 Owners Manual > DSC Dynamic Stability
Control: Overview
Button in the vehicle
DSC OFF button
Indicator/warning lights
The indicator lamp flashes: DSC
controls
the drive and braking forces.
The indicator lamp lights up: DSC has
failed. ...