I have a 2000 SAAB 95 SE. It was purchased by me in 2004 at just over 38900 miles. It now has just over 66000 miles and is currently at the dealer with the same symptoms as it had when the last 3 catalytic converters went out. The first time we had trouble was within 20 days of purchase and the mileage was at 39485. That cat. Conv. Lasted until 58114 miles and the last one went out at 62301 miles. The dealership will only fix the immidiate problem, but has not diagnosed the root of the problem. Do you have any idea what would cause this to happen so much? 4 catalytic converters in less than 30 thousand miles seems quit excessive. Any imput would be greatly appreciated.