Question about the rear wheel bearing
 

My dad has a 2001 Santa Fe, and the rear wheel bearing is bad. Is the rear wheel bearing a whole hub unit?

Does this help answer the question?

http://www.hmaservice.com/data/Passe...G/eijd031a.gif

Thanks for the schematic, Are they pressed on to the trailing arm? So I need a press to remove it.

From http://www.hmaservice.com/

REMOVAL

1.Raise the vehicle and remove the wheel and tire.
2.Remove the split pin and flange nut.
http://www.hmaservice.com/data/Passe...G/kgx7002a.gif
3.Remove the brake disc.
4.Detach the wheel speed sensor (for a vehicle equipped with ABS)
5.Remove the parking brake assembly.
6.Remove four(4) the rear housing mounting nuts.
http://www.hmaservice.com/data/Passe...G/eija014d.gif
7.Using the special tool, remove the rear hub assembly from the rear housing
http://www.hmaservice.com/data/Passe...G/eija014e.gif
8.Using snap ring pliers, remove the wheel bearing snap ring.
http://www.hmaservice.com/data/Passe...G/eija014g.gif
9.Using the special tool, remove the wheel bearing inner race from the rear housing.
http://www.hmaservice.com/data/Passe...G/eija014f.gif
INSTALLATION1.Apply a thin coat of multi-purpose grease to the contact surface of the rear housing and bearing.
2.Using the special tool (09216-22100, 09532-32000) press in the bearing to the spindle.

Press-in load [kg(f), Ib(f)] : 4500-5000 (9921-11023)

http://www.hmaservice.com/viewer/img/note_icon.gif• Do not press the outer race of the bearing because that can cause damage to the bearing assembly.
• When installing a bearing assembly, always use a new one.
3.Install the snap ring.
4.After fitting the backing plate to the rear housing, press in the hub onto the rear housing using the special tool.
http://www.hmaservice.com/viewer/img/note_icon.gif• Do not press the outer race of the wheel bearing because this can cause damage to the bearing assembly.
http://www.hmaservice.com/data/Passe...G/eija014h.gif
5.Rotate the hub several times to seat the bearing.
6.Measure the wheel bearing starting torque.
http://www.hmaservice.com/data/Passe...G/s5ds022d.gif
7.Measure the end play of the hub by installing a dial gauge and check that it is within specifications.

Hub end play : 0.008 mm (0.0003 in.) or less

8.Remove the dial gauge and install the rear axle assembly to the trailing arm.
INSPECTION1.Check the hub for cracks and splines for wear.
2.Check the hub bolts for cracks and damage.
3.Check the brake disc for scoring and damage.
4.Check the rear housing for cracks.
5.Check the wheel bearing for defects.

MEASUREMENT OF THE END PLAY OF THE WHEEL BEARING
1.Install a dial gauge as shown in the illustration.
2.Check for axial motion (end play).

Limit value : 0.05mm or less

3.If the end play is over the limit, loosen the flange nut and tighten it again to the specified torque. Then measure it again.
4.If the end play is beyond the limit, replace the rear hub assembly.

In step 9 Using the special tool, what kind of special tool is that? What is the name of that tool?

Step 9 is basically showing how you press the race out with a machine press.

Better back up a little bit. First of all, it matters if you have 2WD or 4WD, they are completely different. I think the diagram is showing 4WD.

Second, it matters if you have ABS or not.

If you have 2WD, then it's just a hub assembly you just unbolt from the trailing arm.

http://www.autozone.com/autozone/cat...questid=313497

yes the vehicle is the 4 wheel drive.