Usually w/ sagging you need
NEW door pins(not from the junkyard)...the pins in the hinges. They should only be a couple bucks at the dealership (famous last words
). Just tap them out from the bottom up (similar to your doors in your house), do one hinge at a time completely & grease the pins good. You shouldn't need to remove the door for this (put a block under the open edge of the door so it doesn't drop when you remove the pin, or have someone help hold the door)... You can see how they wear thin once you get them out, allowing the door to sag.
