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: Camshaft Position Sensor (CMPS)
Specifications Specifications Item Specification Air Cap (mm) 0.2 - 2.0 Description and operation Description Camshaft Position Sensor (CMPS) is a hall sensor, which detects the camshaft position by using a hall element. It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of each cylinder which cannot be detected by the CKPS.Components and components location Components 1. Brake lamp switch 2. Brake pedal Description and operation Operation Operation principle of inductive non-contact switch 1. Use the high frequency magnetic field and the induced current that are generated by oscillation (to approved voltage) of coil in switch.