NHTSA Complaint #11047225 — 2004 MAZDA RX-8

SYNOPSIS: POWER STEERING GOING CRAZY AT HIGHWAY SPEEDS. STARTING APPROX 2 YEARS AGO, THE POWER STEERING WOULD SHUDDER, OR JERK BACK AND FORTH, WHEN TURNING THE STEERING WHEEL (SOMEWHAT SHARPLY), FOR SEVERAL MINUTES AFTER THE CAR WAS STARTED. THIS HAPPENED EXCLUSIVELY IN COLD WEATHER, AND AT LOW SPEEDS. ONCE THE CAR WAS IN MOTION FOR A FEW MINUTES, THE BEHAVIOR WOULD CEASE. THE COLDER THE WEATHER, THE STRONGER THE JERKING (IT SEEMS). HOWEVER, A FEW WEEKS AGO, THE STEERING EXHIBITING THE "NORMAL" AMOUNT OF SHUDDER, AND THEN STOPPED AS USUAL. BUT A FEW MINUTES LATER WHEN I WAS TRAVELING ON A HIGHWAY (AT HIGHWAY SPEEDS), IN RELATIVELY STRAIGHT LINE, THE STEERING SUDDENLY BEGAN VIOLENTLY JERKING BACK AND FORTH. NEEDLESS TO SAY THIS WAS DISCONCERTING. I WAS ABLE TO CONTROL THE CAR USING BOTH HANDS (I AM A STRONG ATHLETIC MALE). THE EVENT LASTED ABOUT 5-10 SECONDS. I HAVE RESEARCHED THIS BEHAVIOR WHEN I FIRST NOTICED IT A FEW YEARS AGO, AND THERE ARE NUMEROUS REPORTS ONLINE ABOUT THE SHUDDERING BEHAVIOR AT STARTUP. ONE SUCH THREAD (THERE ARE MANY) IS HERE: HTTPS://WWW.RX8CLUB.COM/SERIES-I-TROUBLE-SHOOTING-95/STEERING-WHEEL-SHAKES-MORNINGS-219210/ AND A VIDEO SHOWING THE BEHAVIOR IS HERE: HTTPS://WWW.YOUTUBE.COM/WATCH?V=8XZSRXWTH8S&FEATURE=YOUTU.BE&T=1S ALL OF THE REPORTS INDICATE IT HAPPENS IN THE FIRST FEW MINUTES OF OPERATION, THEN THE STEERING IS FINE. SO I WAS NOT OVERLY CONCERNED. BUT THIS LAST EPISODE AT HIGHWAY SPEEDS WAS VERY SCARY, AND I THINK WARRANTS IMMEDIATE INVESTIGATION. THANKS, RICK