Depends on whether you mean rear or front. Rear are inner and outer mounted on an axle spindle with a thrust washer and lock nut. Oil seal is located in the inside with rubber on the last shaped part of the spindle. Torque on lock nut is first 18-22 ft lbs then back off to allow the thust washer to move freely on the spindle. At this point a drag guage or scale is necessary to measure the drag of the oil seal (brakes backed off before this is done). That amount of drag plus 2.6 to 8.5 newtons of drag totaled (the orignal seal drag plus the specified amount by the manufacturer) added together is what you will need and get by tightening the lock nut to reach the total value. That's called pre-loading the bearings. If you over-tighten or under-tighten you will quickly wear out the bearings and may end up loosing your wheel while driving. So be sure to invest in a drag scale for a few bucks and do it correctly.
Front are completety different.
I recently did this for my 2004. I found it was cheaper to replace the entire wheel hub then to buy the bearings. The bonus is the new wheel hub comes with the bearings already to go.
No experience to do that. A mechanic man will do very good job for your Kia
yes
Remove the tire and wheel from your 2003 Kia. Remove the axle end. Remove the wheel bearing retaining nut. Remove the wheel bearing and the wheel seal. Reverse the process to install the new wheel bearings.
The 2004 Kia Sedona has front wheel drive.
The 2004 Kia Rio has front wheel drive.
The 2004 Kia Sorento has rear wheel drive.
The 2004 Kia Optima has front wheel drive.
The 2004 Kia Optima has a 8 ft. 10.3 in. (106.3 in.) wheel base.
The 2004 Kia Sedona has a 9 ft. 6.6 in. (114.6 in.) wheel base.
The 2004 Kia Rio has a 7 ft. 10.9 in. (94.9 in.) wheel base.
The 2004 Kia Sorento has a 8 ft. 10.7 in. (106.7 in.) wheel base.