Kia Optima DL3: Brake System / Master Cylinder

Turn ignition switch OFF and disconnect the negative (-) battery cable.

Remove the air cleaner assembly.

G 2.0 NU MPI (Refer to Engine Mechanical System - "Air Cleaner")

G 2.5 GDI THETA II (Refer to Engine Mechanical System - "Air Cleaner")

Disconnect the brake fluid level sensor connector (A).

Check that the brake reservoir tank oil level sensor connector is properly installed. (Brake warning light turns on when not connected.)

Remove the brake fluid from the master cylinder reservoir with a syringe.

• Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water. • Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid.

Separate the brake tube (A) from the master cylinder by loosening the tube flare nut.

• Be careful of tap damage and chipping when removing the brake tube. • When mounting, pay attention to the position of the brake tube and correctly install the flare nut.

Remove the master cylinder (A) after loosening the master cylinder nuts.

Separate the reservoir from the master cylinder after remove the screw (A).

Install in the reverse order of removal.

• Before installing the pin, apply the grease to the joint pin. • Use a new snap pin whenever installing.

After installation, bleed the brake system.

(Refer to Brake System - "Brake Bleeding Prcoedures")

Check the brake oil leakage and pedal operating condition.