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: Side Impact Sensor (SIS)
Description and operation Description • Side Impact Sensor (SIS) system consists of two Pressure Side Impact Sensor (P-SIS) installed at each center of the front door module (LH and RH), two SIS installed at each center pillar nearby (LH and RH) and two rear SIS installed in the rear pillar (LH and RH). • Pressure Side Impact Sensor is also called P-SIS because it detects pressure from collision at its mounting location.Kia Stinger (CK) 2018-2023 Owner's Manual: Smart Cruise Control (Stop & Go) (SCC) ECU
Description and operation Description The smart cruise control unit is installed on the front right-hand side of the chassis. A radar sensor is embedded in the front section of the unit. This sensor detects vehicles and objects in front of the vehicle. The radar sensor can detect up to 64 objects ahead of the vehicle. The alarm goes off when the vehicle deviates from the horizontal and vertical alignment reference points during operation.