2003 Nissan Frontier SERVICE BRAKES, HYDRAULIC

I NOTICED A "TICKING" SOUND FROM THE REAR OF MY TRUCK. MY OWN INVESTIGATION I FOUND THAT THE "HOUSING" THAT THE REAR SPEED SENSOR IS MOUNTED IN IS CRACKED. THIS IS WHAT CONTROLS THE ABS SYSTEM FOR THE REAR WHEELS. THE "HOUSING" IS MOUNTED TO THE FRONT OF THE DIFFERENTIAL. I DID CHECK AND THERE IS/WAS A RECALL ON CERTAIN NISSAN FRONTIER TRUCKS DURING THE 03 YEAR. I WAS TOLD THAT MY TRUCK IS NOT COVERED UNDER THIS RECALL. THE PART, WHICH I HAVE YET TO REPLACE, IS EXTREMELY CORRODED FOR BEING ONLY 6YEARS OLD WITH 45000 MILES. IT IS MADE OF ALUMINUM. I AM HAVING A HARD TIME LOCATING THE CORRECT PART, EVEN FROM THE DEALER. THE PART THAT I WAS TOLD IS THE CORRECT ONE IS $232. BUT DOING A LITTLE RESEARCH THAT PART IS ONLY THE WIRING FOR THE SENSOR NOT THE METAL "HOUSING". I NOTICED THIS ABOUT 2 MONTHS BACK, BUT THOUGHT IT MIGHT BE SOME RUST IN THE BRAKE DRUM FROM THE WINTER. *TR

ANTI-LOCK BRAKES ACTIVATE AT UNPREDICTABLE TIMES WHEN STOPPING. HAVE NEARLY CAUSED 2 WRECKS. DEALER COULDN'T FIND THE PROBLEM AND REFUSES TO TAKE ANY ACTION. IT HAS HAPPENED 4 TIMES IN 3000 MILES. *LA

WHEN BRAKES ARE DEPRESSED THE VEHICLE WILL SHIMMY. THE REAR END SHIMMIES MORE SEVERELY WHEN BRAKE ARE DEPRESSED AT HIGH SPEEDS. CAUSE OF PROBLEM UNKNOWN. *AK *TS

WHILE DRIVING THE VEHICLE APPLIED THE BRAKE AND THE ENGINE SUDDEN ACCELERATION, CAUSING A REAR ENDING ACCIDENT. DEALER HAS BEEN NOTIFIED. PLEASE PROVIDE FURTHER INFORMATION. TS