1. Raise the car.
2. Remove the wheel.
3. Remove the brake caliper and disc:
4. On the front wheels, separate the hub from the disc.
5. Screw the nut onto the stud and press the stud out with a puller (set the pin to the 5 or 7 o'clock position).
6. Turn away a nut and get hairpin.
7. Insert a new stud so that the teeth line up with the teeth in the hole.
8. Put on 4 washers, wrap the nut on the stud.
9. Tighten the nut so that the stud rests against the back of the hub, unscrew the nut and remove the washers.
10. Install all parts in reverse order. Install the wheel and lower the car.