I think the question might be CAN they live without it? It's a long ways back to earth, and if they end up dead because something was striped that they actually needed at some point...<br/><br/>I don't think space going ships are equipped with a lot of non-essencial parts that can just be removed.<br/><br/>On the other hand, there are dozens of explorers, probes and junk laying about from previous missions, drones and so on over the last 120 years... there is probably enough of that to assist in replacing equipment, salvaging reusable items and adapting  parts... don't forget the junkyard of equipment scattered across the surface of mars (and in orbit for that matter)