2009 Jeep Patriot 4X4

I HAVE A VEHICLE WITH A TIRE PRESSURE MONITORING SYSTEM. TWO TIRE VALVE STEMS ARE CRACKED AND ONE HAS A SLOW LEAK. I HAVE READ OF OTHERS WITH THE SAME SYSTEM WHERE THE VALVE STEMS SIMPLE BREAK WHEN HAND WASHING THE CAR AND THE TIRE GOES FLAT IN SECONDS. THIS IS A SERIOUS HAZARD AND COULD KILL SOMEONE IF IT HAPPENED ON THE HIGHWAY. IT IS OUTRAGEOUSLY EXPENSIVE TO REPLACE THESE STEMS. *TR

I HAD MY VEHICLE AT TUFFY MUFFLER FOR AN OIL CHANGE AND TIRE ROTATION/INSPECTION WHEN THEY POINTED OUT THAT THREE OF THE FOUR METAL TIRE PRESSURE/POSITION SENSORS WERE CRACKED. THE STATED THIS COULD RESULT IN AN IMMEDIATE RELEASE OF AIR WHEN THE VEHICLE IS IN MOTION. THEY ALSO TOLD ME THEY HAD REPLACED AN UNUSUAL NUMBER OF THESE ITEMS IN CHRYSLER MADE PRODUCTS. IT APPEARS THERE IS A DEFECT IN THE METAL ALLOY THEY ARE USING. I CALLED CHRYSLER TO INFORM THEM THAT I WAS FILLING A COMPLAINT AS THEY DID NOT SEEM CONCERNED WITH CUSTOMER SAFETY ISSUE. I AM COVERED UNDER A LIMITED WARRANTY FOR MOST OF THE COST BUT THE ISSUE IS THE POSSIBLE LOSS OF TIRE PRESSURE WHILE THE CAR IS IN MOTION. *TR

CHRYSLER IS INTENTIONALLY INFLATING TIRES TO 40 PSI TO PREVENT LOW PRESSURE WARNING LIGHT FROM COMING ON. I TOOK MY JEEP PATRIOT TO ROCHESTER HILLS (MI) CHRYSLER FOR A TIRE ROTATION I FOUND THE TIRES INFLATED TO 40 PSI WHEN I INQUIRED, THE SERVICE REP SAID IT WAS "TO PREVENT THE WARNING LIGHT FROM COMING ON WHEN IT GETS TO 0 DEGREES." 40 PSI IS 8 PSI OVER THE DOOR STICKER RECOMMENDED 32 PSI. IF YOU USE THE "12 DEGREES CHANGES THE PRESSURE BY 1 PSI" AS PER THE OPERATORS MANUAL AND YOU INFLATED THE TIRES AT THE RECORD HIGH AMBIENT OF 62 DEGREES AND CHECKED THEM AGAIN AT THE RECORD LOW OF -11 DEGREES (73 DIVIDED BY 12= 6 PSI) THE DEPARTURE FROM AVERAGE LOW 19 DEGREES TO RECORD LOW -11 EQUALS 2 PSI. THE DEPARTURE FROM THE AVERAGE HIGH 33 DEGREES TO AVERAGE LOW 19 DEGREES EQUALS 1 PSI. CHRYSLER'S ACTIONS INDICATE A PROBLEM WITH THEIR TIRE PRESSURE SENSORS. *TR