The BSD indicator on the outer side view mirror may not illuminate properly when:
Kia Cee'd JD Service Manual: Components and components location
Components
1. Steering
column shaft
2. ECU
3. Motor
4. Steering gear box
...
Kia Cee'd JD Service Manual: Rear Combination Lamp Repair procedures
Removal
[5Door]
Rear Combination lamp (Inside)
1.
Disconnect the negative (-) battery terminal.
2.
Remove the rear combination lamp cover (A).
3.
Remove the mounting nuts (4EA) and ...