while driving, suddenly abs indicator, esc off indicator and "abs system failure" message on dashboard showed up and had to make emergency stop since all of these scared me. also scared me that vehicle's abs and stability control stop working. - after started driving slowly - some noise from front wheels were coming. went to dealer and told us that issue with "wheel speed sensor" and "tone wheel" damaged.. why these sensors are exposed to road and damaged suddenly that make safety issue during driving and may have caused accident. *jb