Has anyone had any problems with the abs light it just came on, just wondering wtf causes this nice malfunction

 

Its either a sensor ($250) or an ABS actuator ($1400+)

My ABS actuator went, I argued the dealership into replacing it free of charge because they had misdiagnosed it as a sensor in the first place, and it had to be fixed twice. Just a warning, this problem is only covered under the 36,000mi bumper-bumper warrenty, so if you are o ver 36k, brace yourself.