This warning light illuminates:
Kia Niro 2017 (DE HEV) Service Manual: Power Door Mirror Switch Schematic diagrams
Circuit Diagram
Driver Power Window Switch (Non-IMS
Type)
[Auto Folding Mirror
Switch]
[Non-Folding Mirror
Switch]
Driver Power Window Module (IMS Type)
...
Kia Niro 2017 (DE HEV) Service Manual: Rear Center Seat Belt Retractor Components and components location
Component Location
1. Rear center seat belt retractor
...