I ve heard this fix may be applicable to more year models but have not confirmed this.
How to fix door handles on a kia.
This process will work for the following at minimum.
How to repair a car door handle.
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A simple how to on removing and installing the door handles on a 1st gen kia forte this tutorial is done on a sedan but should also work on the koup and 5.
Replacing a kia sorento door handle when it falls off.
Remove the door trim inside by loosen 3 bolt with screw driver then pull out the door trim after that loosen the hex bolt 3 hex bolt on lock mechanism bracket after that you can loose bolt 4 hex bolt on handle cover.