Need to replace the above converter.......any thoughts on whether I need to go back with OEM, or are there any good aftermarket brands..........which wont set off a check engine light. Should I replace all the Oxygen sensors while i am doing this? Car has 139,000 miles and runs like a top. The car runs fine but has an internal "rattle" that is getting worse. BTW, it is not the heat shield if you are wondering but sounds like a rock rolling around in a tin can.
Thanks for your help.
Thanks for your help.