Short answer: no
As long as you don’t mess something up during install. It should be easily removable with no trace of installing if needed before service.
If Kia warranty tries to blame the remote starter for an unrelated issue that warranty should cover, you are protected by the Magnuson–Moss Warranty Act.
en.wikipedia.org
Your vehicle's warranty is designed to protect your wallet should anything fail, but it doesn't apply in all circumstances. Here are some scenarios that can void your warranty.
www.edmunds.com