I’ve been doing an oil change on my 2009 NC Auto today and while I was underneath I noticed the catalytic converter casing had rusted through. As you can see from the picture it’s a fairly big hole. There’s no leakage of exhaust gases and as the car passed the emission test at MOT earlier this year I assume the cat is doing its job. It wasn’t even mentioned as an advisory on the MOT.
I confess that Catalytic Converters aren’t usually a on my radar when maintaining my cars but seeing this hole made me stop and think. If it was part of the exhaust I’d probably be repairing the hole but I’m not sure whether I should do anything in this case? It seems rusted cat casings are quite common. Any thoughts?