ok my kid has a 07 2wd xterra, when she bought it it had an after market alarm system which also added power windows & locks, well she kept having problems with it locking the car down so it wouldn't start, i'd go throught resetting it, all ok, kept doing it so we had the system removed, car still won't start on cold mornings, figured out ECM must have a bad sodder, if u warm the ecm with a hair dryer it starts, we converted the car back to its origional configuration (crank winwows & key locks) now the Air Bag icon is flashing on dash & horn don't work, starting to think car is posessed. Any idea what would cause my new problems and how to cure

 

sorry to hear this about your xterra! hope youre able to find a solution!