Kia Optima: Underdrive Brake Control Solenoid Valve(UD/B_VFS). Description and OperationDescription
Underdrive brake control solenoid valve(UD/B_VFS) is attached to the valve body. This variable force solenoid valve directly controls the hydraulic pressure inside the underdrive brake.

Removal
Underdrive Brake Control Solenoid Valve(UD/B_VFS). SpecificationsComponents and Components Location
Component Location
1. Audio unit
2. Midrange speaker
3. External amplifier
4. Glass antenna (AM/FM)
5. Front door speaker
6. Rear door speaker
7. Woofer spe ...
Precautions For Catalytic Converter
If a large amount of unburned gasoline flows into the converter, it
may overheat and create a fire hazard. To prevent this observe th ...
Replacement
When the receiver first arrives for replacement:
1)
It will be in Virgin
State.
2)
It wi ...