The tie rod that runs diagonally from the lower control arm to the subframe is a frequent candidate for replacement. If you have a very early Mini, the tie rods were of a poor design and must be replaced. If yours has been badly bent by an accident or misplaced jack, then it should be replaced. Supplied complete with bushings and mounting hardware for both ends. Sold each.
See also SSS0135 heavy-duty adjustable pair.