Same problem I have. In stop and go traffic when Im rolling forward slowly I will hear the squeaking noise from the front pass side. When I accelarate quick, or press on the brakes no noise. I even jacked it up and checked if something was loose or if my pads were low. From read the other posts about this issue, I have to check on my sensor. Since thats the only part I didnt mess, but pretty sure that will remedy it.
TiAG E90 N54 335i | COBB | RB | FBO