i have a 97 318ti with over 160k miles. Check engine came on during the summer. went to dealer who said the error codes were for my converter. went to midas same result but a less expensive quote. over the last few months Midas has had to replace the converter 3 times and according to them has used three different after market converters as the check engine light keeps coming on. today the light came on for the fourth time. Assuming its the converter again does anyone have any experience with this and a possible solution?