Problems with 2009 Jeep Commander TIRES

I am the original owner of a 2009 jeep commander. in the fall of 2013 i purchased 4 new tires,and was told 2 valve stems were cracked so i had them replaced. on 9/3/14 on the wva turnpike at 70 mph the left rear warning light flashed and then counted down from 40lbs to 5lbs in 10 seconds. i was able to stop on a very narrow berm and called aaa to change the tire. on return home went to the tire store and was told the stem nut (one of the remaining ones) had broken off and the transmitter fell into the tire causing therapid air loss. on inspection on the remaining stem nut it was found to be cracked and split as iit was removed. the crack had corrosion indicating it had been there for some time. i have no doubt it could have broken off at speed. i believe the only reason i was able to keep the car under control was due the failure being a rear wheel. noted on line other jeep drivers with similar incidents. obviously there should have been a safety notification if not an actual recall. *tr

Tl* the contact owns a 2009 jeep commander. while driving approximately 65 mph the tire pressure warning light illuminated on the instrument panel. the contact stopped the vehicle on the shoulder of the road and noticed that the rear passenger side tire was flat. the contact replaced the tire with the spare tire. the vehicle was taken to a tire shop for diagnostic testing. the technician stated the valve stem pressure sensors on the front passenger side and the front and rear driver side were corroded and had to be replaced. the vehicle was repaired. the approximate failure mileage was 54,550. updated 10/11/12*lj updated 10/11/2012 *js