the bulletins were fix-as-fail meaning if it wasn't broken they weren't fixing them
the psb-2018-020 (IIRC) wasn't a recall but a reliability update that many including myself took advantage of. It was a 3 or 4 part repair, took the better part of a day to do all of it. I did 2 a day for 4 months. Paid my bills quite well for a while.
There was the fix-as-fail bulletin a couple years back that had to do with frequent belt failures. I don't know of the bulletin's expriation date. Call dealer and tell 'em your belts keep breaking/coming off and ask them about the bulletin. If they don't know, PM me and I'll give you a number to call the dealer I used to work for. They'll know.