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: RCV Control Solenoid Valve
Specifications Specification Item Specification Coil Resistance (Ω) 28.3 - 31.1 [20°C(68°F)] Description and operation Description Installed on the intercooler inlet pipe, the RCV (Recirculation Valve) Control Solenoid Valve operates the RCV actuator which controls the by-pass passage of the turbocharger compressor.Kia Stinger (CK) 2018-2023 Owner's Manual: ECS(Electronic Control Suspension) System
Components and components location Components 1. ECS ECU 2. Front ECS Damper 3. Wheel speed sensor 4. Rear ECS Damper 5. Body G Sensor Description and operation Operation System Check the MCU and the state of each part when electric power is applied to ECU and prepare to operate.