2004 Nissan Murano

Engine Performance problem
2004 Nissan Murano 6 cyl All Wheel Drive Automatic 132, 00 miles

My car is due for inspection by the end of February 2010 the problem is the check engine light shows there is a problem with the catalytic convertor. I have been told by several mechanics that it needs to be replaced. My question is it worth it for me to replace the convertor or get a new vehicle. I just put four brand new tires on the car and new brakes! My job requires me to drive at least 100 miles per day five days a week.
February 14, 2010.

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