[Edit]
There are many reasons the light comes on as this is a complex system. You can not turn it off. It must be reset after the fault is fixed. Sometimes dirty speed sensors in the brakes will turn it on. It could be a "broken" control module or ABS pump, both of which are big $$$ to fix. This is a common problem with the Z3s and their ABS/traction control system. If the light is on, you still have brakes, just not ABS.
First answer by ID411132164. Last edit by ID411132164. Question popularity: 4 [recommend question]




