I am trying to get my 2006 M5 E60 SMG smogged and since I live in California I cannot get it tested with the HIGH EMISSION engine warning on. So I have a tool and can clear all faults to try and get it to the point where I can get it smogged. I have already replaced the leading and trailing O2 sensors.
Have any of you M5 owners living in CA had this problem? and had to replace your FRONT EXHAUST CATS?