The sensors are located inside the rear bumper.
Always keep the rear bumper clean for the system to work properly.
Kia Niro 2017 (DE HEV) Service Manual: Front Seat Belt Buckle Repair procedures
Replacement
1.
Remove the front seat assembly.
(Refer to Front Seat - "Front Seat Assembly")
2.
Remove the front seat belt buckle (A) after loosening the mounting bolt.
Tightening torque :
39.2 - 53.9 N ...
Kia Niro 2017 (DE HEV) Service Manual: General information
General Troubleshooting
Information
Before Troubleshooting
1.
Check applicable fuses in the appropriate fuse/relay box.
2.
Check the battery for damage, state of charge, cleanliness and tight
connections.
(Refer to Engine Electrical ...