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: Crankshaft Position Sensor (CKPS)
Specifications Specifications Item Specification Type Magnetic field sensitive Output Voltage (V) 4.75 - 5.25 (25°C) Input Voltage (V) 0.6 - 4.5 Air Cap (mm) 0.5 - 1.5 Description and operation Description Crankshaft Position Sensor (CKPS) detects the crankshaft position and is one of the most important sensors of the engine control system.Components and components location Components 1. Front drive shaft [LH] 2. Front drive shaft bracket 3. Front drive shaft [RH] Repair procedures Removal [3.3 T-GDI LAMBDA II (LH)] 1. Remove wheel nuts, front wheel and tire (A) from front hub. Tightening torque: 107.