I'm in the camp of changing it, if it leaks I don't wanna remove plastic again to get to it, plus you might not see it because of those plastic covers. These Hyundai/Kia plugs you really have to deform the gasket for it to seal, I had 2 very small leaks that wasn't noticable on the dip stick, just a drop on the bolt. Both times torqued to spec.