FOR ABOUT THE LAST FIVE THOUSAND MILES, MY STEERING HAS DEVELOPED THE DANGEROUS STEERING CONDITION( DESCRIBED BY LITERALLY HUNDREDS OF OWNERS IN BLOGS AND VARIOUS POSTINGS-JUST DO A SEARCH FOR "Z4 STEERING PROBLEM") THAT EXISTS IN 2003-2005 BMW Z4 ROADSTERS. AT FIRST, THE PROBLEM OCCURRED ONLY ON VERY HOT DAYS (AS DESCRIBED MY MANY OTHERS). NOW, IT AFFECTS ALL ASPECTS OF DRIVING, MAKING THE VEHICLE VERY DIFFICULT TO CONTROL. STEERING REQUIRES CONSTANT CORRECTION FROM LEFT TO RIGHT AND DOES NOT RETURN TO CENTER. I HAVE REPLACED TIRES TWICE AND HAD SEVERAL ALIGNMENTS WITH NO EFFECT. IF EVER THERE WAS A SAFETY ISSUE THAT WOULD WARRANT A RECALL THIS IS IT. THE DEAD STEERING DESCRIBED IS MOST EVIDENT AT HIGHWAY SPEEDS (50-70MPH)