Brake Line
Components and Component Location
Components

| 1. HECU Flare Nuts 2. HECU Mounting Nuts to Body 3. Master Cylinder to HECU Flare Nut 4. Front Brake Tube Flare Nut |
5. Front Brake Tube to Brake Hose 6. Rear Brake Tube Flare Nut 7. Rear Brake Hose to Brake Tube |
Repair Procedures
Removal
Brake Tube [Engine Room]
Disconnect the brake fluid level switch connector and remove the reservoir cap.
Remove the brake fluid from the master cylinder reservoir using a syringe.
Remove the brake tube after loosening the flare nuts on the ESC, master cylinder connector, and brake tube.
Tightening Torque
ESC: 18,6–23 N·m
Master Cylinder:
18,6–23 N·m
Brake Tube Connector:
13,7–16.7 N·m
Brake Hose
Disconnect the brake fluid level sensor connector (A).

Remove the brake fluid from the master cylinder reservoir using a syringe.
Remove the front wheel and tire.
(Refer to Tires/Wheels — "Wheel")
Remove the flare nut of the tube (A).
Loosen the brake hose bracket bolt (B).
Tightening Torque
(A) : 13,7–16.7 N·m
(B): 19,6–29 N·m
[Front]

[Rear]

Loosen the mounting bolt (A) and remove the brake hose bracket from the strut assembly.
Tightening torque: 8.8–13.7 N·m

Remove the hose after loosening the brake hose bolt (A) on the caliper.
Tightening torque: 24.5 - 29 N·m
[Front]

[Rear]

Inspection
Inspect the brake tubes for cracks, bends and corrosion.
Inspect the tube flare nuts for damage and fluid leaks.
Installation
Install in the reverse order of removal.
After installation, bleed the brake system.
(Refer to Brake System - "Brake Bleeding Procedures")
Test yourself
A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.