cost to repair catalytic converter
1 CarMD.com names replacing a catalytic converter as the third most common car repair related to a check engine warning light, and estimates the average cost for parts and labor at $1,029. This raises the total price for parts and labor to $175-$850 or more. 2  For example, JC Whitney charges $186 for the aftermarket Bosal 49-state Legal Catalytic Converter (not legal in California) for a 1998 Chevrolet S10.