2009 SCION XB Equipment Adaptivemobility Problems

OUR SECURITY SYSTEM HAS STARTED GOING OFF AT RANDOM WHILE WE ARE DRIVING DOWN THE HI WAY AT 65 MPH OR WHEN WE ARE MAKING A TURN, THE 4WAYS START FLASHING AND THE HORN STARTS BLOWING, THIS IS SCARY AND CAN CAUSE OTHER CARS TO SLOW OR STOP BEHIND US. *TR

I TOOK THE VEHICLE TO MY DEALERSHIP BECAUSE I HAVE FOUR WARNING LIGHTS ILLUMINATED, THEY WERE BRAKE, TRACTION CONTROL, ABS, VSC. THE DEALER DIAGNOSED THE PROBLEM TO BE THE RIGHT REAR AND LEFT REAR ABS SENSORS AND CABLES WITH A REPLACEMENT COST OS $1357.04 PLUS DIAGNOSTIC FEE OF $59.66. I ASKED WHY THE SENSORS WERE DEFECTIVE AND NEEDED REPLACEMENT, THEY TOLD ME IT WAS DUE TO CORROSION FROM ROAD SALT. THIS SEEMS LIKE A MANUFACTURING ISSUE!! I'VE SEEN A SCION SERVICE BULLETIN (S-SB-0040-09 DATED JULY 6, 2009) THAT ADDRESSES THIS ISSUE. I HAVE ASKED THE DEALER AND SCION IF THEY COULD HELP ME OUT IN ANY WAY AND THEY'RE ANSWER WAS NO. I REALIZE MY CAR IS OUR OF WARRANTY BUT WHY SHOULD AN OWNER OF A VEHICLE HAVE TO SPEND $1400.00 TO REPLACE COMPONENTS THAT THE MANUFACTURE HAS SINCE CORRECTED THE DESIGN DUE TO THIS PROBLEM? *TR