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The 2003 Kia Sorento has rear wheel drive.
The 2003 Kia Optima has front wheel drive.
The 2003 Kia Sedona has front wheel drive.
The 2003 Kia Rio has front wheel drive.
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.
In my late 2003 Optima it was in the trunk over the rear passenger wheel well.
The 2004 Kia Sorento has rear wheel drive.
The 2006 Kia Sorento has rear wheel drive.
The 2002 Kia Sportage has rear wheel drive.
The 2009 Kia Sorento has rear wheel drive.
The 2005 Kia Sorento has rear wheel drive.
The 2007 Kia Sorento has rear wheel drive.