I WAS DRIVING DOWN THE ROAD WHEN THE LEFT SIDE OF MY SEAT TILTED SUDDENLY, THROWING ME OFF BALANCE AND CAUSING MY BACK TO TWIST. I STOPPED IMMEDIATELY, AND FOUND THAT THE SEAT WAS UNSTABLE. I TOOK IT TO MY LOCAL MECHANIC, WHO SHOWED ME WHERE THE WELD HAD FAILED ON THE LEFT SIDE OF THE SEAT. AS ADVISED, I CALLED MY NISSAN DEALER, WHO INDICATED THAT QUOTE "THIS HAS HAPPENED FREQUENTLY, AND WE HAVE RECEIVED A REPLACEMENT PART FOR THE REPAIR, WHICH WE KEEP IN STOCK." THEY INDICATED THE COST WAS $660 PLUS THE COST OF INSTALLATION, AS MY CAR IS 3000 MILES OVER THE GENERAL WARRANTY LIMIT. ALTHOUGH I WAS NOT INJURED, THIS SEAT IS NOW UNSAFE, AS IT IS ONLY PARTIALLY ANCHORED TO THE FLOOR. ADDITIONAL STRESS IS ON THE REMAINING WELD, AND IT CAN FAIL AT ANY TIME. ADDITIONALLY, ANY IMPACT CAN CAUSE THE SEAT TO BECOME UNANCHORED. I AM CONTACTING NISSAN CORPORATE TOMORROW, BUT FEEL THAT THIS IS TRULY A SAFETY DEFECT THAT SHOULD BE THE SUBJECT OF A RECALL REPAIR. PLEASE ADVISE. THANKS. *TR