POWER STEERING ASSIST FAILS; DRIVING AND THE POWER STEERING STOPS WORKING, SOMETIMES UNEXPECTEDLY. VERY DANGEROUS! IT IS SPORADIC--SOMETIMES IT WORKS AND OTHER TIMES IT DOES NOT WORK. USUALLY HAPPENS WHEN STATIONARY, AND TURNING IT ON--POWER STEERING WILL NOT ENGAGE FOR SEVERAL SECONDS. ONCE IT HAPPENED WHEN DRIVING AND I WAS LUCKY TO PULL OVER CAR. TURNED IT OFF AND BACK ON AND IT STARTED WORKING.