Yeah in ca this part was causing my car to be reporting as a gross polluter So they had put in on the dyno and run tests on all the emission systems and anything related. Then run the computer scan on it replace the part and check it all over again. So friggen stupid. My wife and I are retired and fixed income we qualified for a program to pay $500 to get it fixed but the state has it set up so that you can't get away any cheaper than 500 out of pocket but usually moreSay What