I live in CA, my 05 RL won’t pass smog because the codes say I need 2 cats. Have already changed all the O2 sensors. I have about 235K miles on her. I love this car but I’m told it will cost close to $4 K to change the cats! That’s insane!! I’ve found CARB compliant cat converters on line cheaper, but I’m told my car still won’t pass unless they are OEM parts. 😢 what can I do?