You don't say exactly what stud. If it's a wheel stud, the old one can be pounded out, and a new one pulled into place simply by tightening the lug nut on it.
If you can grab it with a pair of vice grips or even a pipe wrench and get it out then you could replace it. If that will not work you will have to buy an easy out and use that to remove the stud.
Remove wheel, brake caliper, brake disc, parking brake shoes etc. Drive out broken stud, replace with new stud. Replace above in reverse order.
Are you asking about a wheel stud or exhaust stud, please clarify
replace keypad Mercury Marquis?
The hub will need to be removed and the stud pressed or drilled out to be replaced.
The stud can be replaced. If you go to NAPA auto parts and order a "P19" stud kit, it will fit in and replace your broken stud.
You can, but since that is the main support it would be best to replace it, preferably with decay resistant lumber.
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Notice there are two threaded holes in the brake drum. Insert a metric bolt into the holes and tighten until the drum pops off. Replace the stud.
You split the nut with a sharp chisel. Don't worry about the stud You will have to replace both anyway, just be careful with the wheel and your fingers.
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to replace a wheel stud, depend on the type of car or truck, jack it up and block it. remove the affected wheel and use a hammer and a punch to drive out the broken stud. most automobiles have an access hole to replace studs with out removing any more components. however some do not. to install place stud in hole and use some washers and a lugnut to mount in place.