Oldyfeliz,you and I live in the same part of Guadalajara,I've driven a vehicle with expired Utah plates for ten years here and have never had a problem.Asking for the ticket,(haz me el folio),is not a useless act.
In ten years I've paid one mordida,100 pesos for a seatbelt infraction,just to avoid the hassle.I do keep a copy of Articulo 106 with my papers and that has been helpful in the past,it also helps to have the right attitude when dealing with transitos or cops in general.