Since you haven't stated the mileage all I can assume is that its under 80K. That cat did not die of old age. More than likely an overly-rich fuel trim destoyed it. Unburned hydrocarbon fuel hits the very hot cat & creates a fire which overheats the catalyst literally incinerating it. One thing that allows unburned fuel into the cat is a misfiring cylinder. A cylinder that does not fire forces unburned fuel into the exhaust. In other words, the bad cat is a symptom of something else (that may have been repaired already-I have no way of knowing).
Last edited by greenman; 07-06-2011 at 11:22 PM.