Tie rod end
Hinge (spherical bearing) bridge
Light the dust caps from all sides and check for damage, while paying attention to traces of grease on and near the covers.
If the caps are damaged, replace the entire corresponding hinge together with the cap. Dirt that gets in will damage the hinge.
Check the tightness of the hinge nuts, but do not twist the nuts.
Note: The Ford KA has a cotter pin on the tie rod end nut. The Ford Fiesta/Mazda 121 has self-locking nuts.