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.
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.
yes
The 2015 KIA K900 has rear wheel drive.
The 2009 Kia Sorento has rear wheel drive.
The 2005 Kia Sorento has rear wheel drive.
The 2008 Kia Sorento has rear wheel drive.
The 2007 Kia Sorento has rear wheel drive.
The 2002 Kia Sportage has rear wheel drive.
The 2003 Kia Sorento has rear wheel drive.
The 2004 Kia Sorento has rear wheel drive.
The 2006 Kia Sorento has rear wheel drive.