Yep! I think all the above says it quite well! I too have never seen a failure like that, 2017 should have a full stainless system. I'm thinking its had an incident with the ground at some point and an old system has been shoved on. Frankly I'm astonished, I really cannot believe that system was from 2017, Where are the lambda sensors? Ignition on but not running is there a check engine light on, if so does it go out on start up? There's just something not right here. I've never even seen an old running mog with something as bad as that! Where did the car come from, A little investigation required here I think.