Wheel studs are the bolts used to hold tires in place; if one breaks, it must be replaced. This procedure is not challenging and requires basic tools with the exception of an air-powered wrench, which produces exceptional torque. It is not recommended to attempt replacement without that particular tool.
The studs have serrations on the sides just below the head and are pressed into the wheel hub. When installing wheel studs, it is important to seat the studs completely, as a partially seated stud can cause lug nuts to loosen and fall off. It is a good practice to coat the studs with an anti-seize compound before installing the lug nuts to prevent stripping the threads.
Raise and support the vehicle on jack stands. Remove the tire/wheel combination. Remove the two retaining bolts from the brake caliper using the appropriate size socket and lift the caliper off of the rotor. Hang the caliper by a piece of wire so it does not hang by its hose (failure to do so could damage the hose and result in brake failure).
Remove the rotor by pulling it straight off of the hub. Then hammer the broken stud out of the hub. One or two good hits and it should come out.
Push the new stud through, then put a washer covered in anti-seize over the stud. Put a lug nut on upside down. Thread the lug nut down until it holds the stud in place.
If the lug nuts are capped it may be necessary to use multiple washers (four or five) to allow enough room to draw the stud into the hub. Remember, it requires a lot of torque to press the stud into the hub, so install anti-seize compound on all the washers so they rotate freely.
Draw the stud into the hub by using the air wrench and tightening the lug nut with short bursts. Be careful to draw the stud in just until the head of the stud is flush with the back of the hub. Stop there so as not to damage or break the new stud. Remove the lug nut.
Replace all parts in reverse order of removal.
