1.Disconnect the negative (-) battery terminal.
2.Remove the heater control unit.(Refer to Heating,Ventilation And Air Conditioning - "Heater Control Unit")
3.Loosen the mounting bolt,nut,screw and remove the Integrated Body Control Unit (A).

4.Disconnect the connectors and remove the Integrated Body Control Unit (A).

1.Install the Integrated Body Control Unit.
2.Install the heater control unit.
3.Connect the negative (-) terminal
Repair procedures
Antenna CoilHyundai Tucson (NX4) 2022-2026 Owner's Manual: Interior Light Replacement
Map lamp, Rear room lamp
(LED type)
If the LED light does not operate, contact
an authorized HYUNDAI dealer for
replacement.
The LED light cannot be replaced as a
single unit. A skilled technician should
check or repair the LED light, for it may
damage related parts of the vehicle.
...
Hyundai Tucson (NX4) 2022-2026 Owner's Manual: Air intake control
To select outside (fresh) air or
recirculated air, press this button.
Recirculated air position
With the recirculated air
selected, air from the
passenger compartment is
drawn through the climate
control system.
Outside (fresh) air position
With the outside (fresh)
air selected, ...