How to replace front wheel bearing 2009 Sonata

nope and my guess is whoever replaced the bearing broke or did not connect the wheelspeed sensor

I assume you are talking about the ones that hold the tire on these ones are likely just pressed in and you should be able to hammer them out just be careful so you don't damage the wheel bearing. I would also test the wheel bearing and make sure it is good if it is bad you would be better off just replacing it a new wheel bearing should have all the studs in it.

this is a very in depth procedure I do not recommend doing this if you cannot or have not taken a wheel bearing off. That being said this is how you do it:
after you have removed the wheel. remove the brake caliper from the steering knuckle* after hanging hte caliper in a safe location try to knock the stud through the wheel bearing**, if the stud does not come free of the steering knuckle then the wheel bearing must be removed, there are generally 3 'E-Torx' bolts that retain the wheel bearing to the hub on the steering knuckle ( you can turn the wheel left to right if need be but be sure that you have jacked up the entire front of the vehicle and that the parking beak is on and the wheels are chocked steady) once you have the broken stud out of the hub you then need to replace the new one. here is how that is done; set the new stud in place then apply a few large washers on the new stud that is seated in the hub. next thread on the lug nut and start tightening the nut down and draw the stud onto the hub, also it is a good idea to tighten down the stud backwards if it is through style lug, if not its no big deal either way, if you bottom out the lug you will ruin the chrome cap so it is a good idea to use as many washers as possible i usually use about 5-6, one inch washers for this procedure. be sure to check the " * " items at the end of these instructions. they will save ou time and trouble.


*YOU DO NOT HAVE OT REMOVE THE BRAKE HOSE FROM THE VEHICLE

** SOME TIMES YOU CAN ROTATE THE WHEEL BEARING AROUND AND GET A CLEAR AREA TO REMOVE THE WHEEL STUD FROM THE WHEEL BEARING WITH OUT REMOVING THE WHEEL BEARING ITSELF

remove cv outer nut, tire brake caliper and lower ball joint use a bar to pry against lower a frame to seperate ball joint slip out cv axel then remove four nuts securing wheel bearing. I would have to check at home for exact instructions.

grind a flat spot on the round head of the new stud this should give enough clearance to install it. don't pull the hub this will damage the bearing.

If you use a hammer to drive the broken stud out you can cause damage to the bearing.
If you use a wheel stud press, the hub bearing will not be affected. The press will remove the old stud and install the new one.
Good luck.
Regards,

IF NO CLEARANCE TO INSTALL NEW STUD THAN YOU WILL HAVE TO REMOVE HALFSHAFT FROM HUB AND KNUCKLE TO PRESS OUT HUB FLANGE,SHOULD BE ABLE TO SNAKE IT IN THERE. WATCH TO NOT DAMAGE BEARING,SUPPORT IT OR IT WILL SEPERATE WHEN PRESSING ON FLANGE OR HUB

dear friend-replacing the stud is a fairly intensive job,the hub must be removed,so you might have to replace the wheel bearing,you will need special tools to attemp this job.

they are manufacturered in one piece, i would say it's broken and needs replacing

1. for drum brakes with sealed hub(all one piece) remove lug nuts and wheel.
2. spray penetrating oil around studs if there is a big phillips head screw visible remove it with impact driver/if not use big ballpeen hammer ,tap on flat of drum near studs(becareful not to hit them) until drum loosens(your creating a shockwave to loosen rust)
3. once drum is off there are 4-bolts coming in from behind backing plate, remove them then hub should be able to be removed w/a little persuation from hammer.

with out sealed hub ,

1. remove wheel
2. remove dust cap,cotterpin,star washer(if equipped) do not re use cotter pin
3. remove nut then washer, wiggle brake drum and front bearing will come out.
4. put nut on shaft tighten 2-3 turns grab drum by sides and pull towards you this should remove drum leaving inner bearing/seal on shaft
5. to replace reverse procedure making sure to pack new bearings w/grease(take drum and use long punch to remove bearing races, use race/seal installer to install new races

with disk brakes

1. remove wheel
2. remove caliper/bracket
3. remove rotor
4. remove 4-bolts from behind,tap old hub out
5. reverse procedure