I have seen a lot of people posting about front air bags sagging. Just wanted to share a little info. This is actually a pretty easy DIY. However the ride height will need to be re-calibrated afterwards. But....I bought a computer, cable and don't mind getting my hands dirty.
I purchased airbags from Rockauto and they are new Arnott struts reasonably priced.
Only takes about an hour per side with minimal experience. There are tons or write ups on how to change them out. Just wanted to share a little info with fellow X lovers. Don't let the dealership charge you $2000 plus to change the bags of you don't have to.
I don't have info in the rears "yet" as I have to replaced them to date.

. The guys on here are very helpful!