bha280

I have an upstream sensor on one side, and a downstream sensor on the other throwing codes and have already bought all 4 to replace them. Looks like it may be a pain to replace. It looks like I'll have to at least drop the exhaust to access them, but what else in involved? Pretty sure I'll have access to a lift as well, just need to know what tools I'll need and what else will need removed (subframe?). Thanks