The good thing about getting the valve stems done is that you should never have to do this again. The replacement valve stem seals that BMW came up with is a far superior material to the originals. The thing with these X's you have to make a choice. its either you go all the way or nothing on the service/repairs. I love these vehicles and have put far more repairs into the vehicle bringing it to a level that I am pleased with (all the way). Once you get it there you begin to really enjoy these SAVs.