Originally Posted by bRunCL
How do you know the converter is bad? Are you just going by the light, or did your mechanic actually test the cat?
+1. Did he perform a backpressure test on it? What codes are being registered? Is the car driving sluggishly?
btw, it is always helpful to put the year and model of you car in your signature
anyways, coming from a BMW, failing catalytic converters were the norm around 100K miles. They typically fail from lack of maintenance, driving with the Check Engine light on or physical damage from running over something. The least expensive option to fix the problem would be having a muffler shop weld in a replacement catalytic converter. A good local shop shouldn't charge anymore than $45-50 for this.
Here is a weld-in model for a 97 3.0 non CA emissions for $247
and here is a direct fit (no welding), same car for $450
I would be 100% certain that is the prob before you do this however. I don't recall Honda's having issues with catalytic converters, but ya never know.