Kia Optima DL3 Quiz
Brake System

Brake System

In this manual: Brake System
General Information — 8Advanced Driver Assistance System (ADAS) — 21Maintenance — 27Engine Mechanical System — 45Engine Electrical System — 11Emission Control System — 11Engine Control System/Fuel System — 25Automatic Transmission — 20Drive Shaft and Axle — 7Suspension System — 22Steering — 7Restraints — 11Brake System — 22Body (Interior and Exterior) — 116Body Electrical System — 90Heating, Ventilation, and Air Conditioning — 32
~1min read

Repair Procedures

Operation and Leak Check

Check all of the following items:

Component Procedure
Brake Booster (A) Check the brake operation by applying the brakes during a road test. If the brakes do not operate properly, inspect the brake booster. Replace the brake booster assembly if it does not operate properly or if there are signs of leakage.
Piston Cup and Pressure
Cup Inspection (B)		 • Check the brake operation by depressing the brake pedal. Look for damage or signs of fluid leakage. Replace the master cylinder assembly if the pedal does not operate properly or if there is damage or signs of fluid leakage.
• Check the brake pedal travel difference between quick and slow braking. Apply... Replace the master cylinder if there is a difference in pedal feel.
Brake Hoses (C) Look for damage or signs of brake fluid leakage. Replace the brake hose with a new one if it is damaged or leaking.
Caliper Piston Seal and
Piston Boots (D)		 Check the brake operation by depressing the brake pedal.
Look for damage or signs of brake fluid leakage. If the pedal does not operate properly, the brakes drag, or there is damage or signs of brake fluid leakage, disassemble and inspect the brake caliper. Replace the dust boots and seals with new ones whenever the brake caliper is disassembled.

Test yourself

A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.