Contents:

Turn the tire hold-down wing bolt counterclockwise.
Store the tire in the reverse order of removal.
To prevent the spare tire and tools from “rattling” while the vehicle is in motion, store them properly.

If it is hard to loosen the tire holddown wing bolt by hand, you can loosen it easily using the jack handle.
1. Put the jack handle (1) inside of the tire hold-down wing bolt.
2. Turn the tire hold-down wing bolt counterclockwise with the jack handle.
Use caution when utilizing the sharp jack handle.
WARNING - Touching luggage room floor surface

Do not touch luggage room metal surface while the engine is operating or hot. Doing so could result in serious personal injury.
Turn the engine off and wait until it cools down or wear gloves to remove the spare tire from the luggage room.
Kia Stinger (CK) 2018-2023 Owner's Manual: Seat Belt Buckle Switch (BS)
Description and operation Description The SRSCM shall monitor the status of the driver and front passenger seat belt buckle. The SRSCM provides one pin each for the driver and front passenger seat belt buckle status input. The seat belt buckle circuit operates from internal boost voltage supplied by the SRSCM, and uses chassis ground for the signal return.Repair procedures Operation and Leakage Check Check all of the following items: Component Procedure Brake Booster (A) Check brake operation by applying the brakes during a test drive. If the brakes do not work properly, check the brake booster. Replace the brake booster as an assembly if it does not work properly or if there are signs of leakage.