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). SpecificationsOdometer
The odometer indicates the total distance the vehicle has been driven. ...
Removal and Installation
1.
Remove the engine cover.
2.
Disconnect the battery negative terminal (A).
Tightening torque
:4.0 ~ 6.0N.m (0.4 ~ 0.6kgf.m, 3.0 ~ 4.4lb-ft) ...
Suspension System. Tires/Wheels. Tire. Repair procedures
Tire wear
1.
Measure the tread depth of the
tires.
Tread depth [limit] : 1.6
mm (0.063 in.)
2.
If the remaining tread depth
(A) is less ...