Contents:

The battery is in the trunk under the compartment cover.
When replacing the battery, disconnect the negative (-) cable (1) and remove the positive (+) battery fuse box (2).
Remove the battery mounting bracket (3).
WARNING - Touching metal surfaces in the trunk under the compartment cover

Do not touch metal surfaces in the trunk under the compartment cover 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 replace the battery from the luggage room.
Your vehicle has a maintenance-free, calcium-based battery.
When recharging the battery, observe the following precautions:
Reset items
Items should be reset after the battery has been discharged or the battery has been disconnected.
Kia Stinger (CK) 2018-2023 Owner's Manual: Horn
Components and components location Component Location 1. Horn switch 2. Horn relay (Built - in Metal Core Block PCB) 3. Horn (Low pitch) 4. Horn (High pitch) 5. Clock spring Repair procedures Removal 1. Remove the front bumper assembly. (Refer to Body - "Front Bumper Assembly") 2.Kia Stinger (CK) 2018-2023 Owner's Manual: Power Door Mirror Switch
Components and components location Components Schematic diagrams Circuit Diagram Front Safety + IMS Type Front Safety + Non-IMS Type Repair procedures Inspection Diagnosis With KDS 1. The body electrical system can be quickly diagnosed for failed parts by using vehicle diagnostic system (KDS).