I’ve been putting off with dealing with a broken header bolt on my ‘08 for way way too long (probably 5-6 years), but the H3 doesn’t see a lot of mileage these days, so it hasn’t been a priority. Aside from being noticeably obnoxious to drive sometimes, I’m reasonably sure that it’s also throwing me a P0455 check engine code.

I understand that this seems to be a common issue with the H3’s, so I’m wondering how many have had to deal with this and anything I need to look out for. It’s the original exhaust, so I’m thinking it makes sense to have new pipes anyway. Or, would you just take it somewhere to have it done?

 

I found a broken bolt on the exhaust pipe to manifold and 1 broken bolt on the manifold to head. Repaired 6yrs ago(exhaust manifold stud upgrade) P0455 is not related to exhaust leak.