Read a great article here on the other Mar rover, Opportunity. He's been up there for awhile now, roaming about, taking data. Its 3 month mission to seek out new worlds and go where no man has gone before has kept on going for almost 10 years. It "It has an arthritic joint in its robotic arm and it drives mostly backward due to a balky front wheel" but it keeps on going.
Presently he's sitting atop the rim of Endeavor Crater, enjoying the view, this view . . . .