What year/model is your car?
Do you have an owners manual? I looked in both an 03 & 06 manual (thanks to
Shipkiller's website) and saw that the lights indicate a malfunction of the abs or dsc/dtc systems.
snip
If the yellow indicator lamps for the
Antilock Brake System ABS come
on together with the brake warning
lamp and the indicator lamp for the
Dynamic Stability Control DSC:
The entire ABS and DSC control
system has failed. Continue driving
cautiously and defensively. Avoid
hard brake applications. Please have the
system checked by your BMW center as
soon as possible