2006 lincoln town car, front right tire, cooper cs4 touring, new 4/28/09, 10,275 miles, went flat during 45 mile drive to work. no evidence of puncture. side wall scored from driving on rim of wheel. wheel found to have corrosion, also found corrosion on all four wheels at ford dealer; 1/12/2010, lh front wheel developed slow leak due to corrosion around rim of wheel; wheel cleaned and sealed with double bead sealer; tire dealer and ford dealer, 2/2/10, both recommended four new wheels. *tr