Kia Optima DL3: Brake System / Brake System

Repair procedures

Operation and Leakage Check

Check all of the following items:

Component
Procedure
Brake Booster (A)
Check brake operation by applying the brakes during a test drive. If the brakes do not work properly, check the brake booster. Replace the brake booster as an assembly if it does not work properly or if there are signs of leakage.
Piston cup and pressure
cup inspection (B)
• Check brake operation by applying the brakes. Look for damage or signs of fluid leakage. Replace the master cylinder as an assembly if the pedal does not work properly or if there is damage or signs of fluid leakage.
• Check for a difference in brake pedal stroke between quick and slow brake applications. Replace the master cylinder if there is a difference in pedal stroke.
Brake hoses (C)
Look for damage or signs of fluid leakage. Replace the brake hose with a new one if it is damaged or leaking.
Caliper piston seal and
piston boots (D)
Check brake operation by applying the brakes.
Look for damage or signs of fluid leakage. If the pedal does not work properly, the brakes drag, or there is damage or signs of fluid leakage, disassemble and inspect the brake caliper. Replace the boots and seals with new ones whenever the brake caliper is disassembled.

Service data Service Data Service data Item Specification Master cylinder Cylinder I.

Components and components location Components 1. Reservoir cap 2. Reservoir 3. Master cylinder 4. Brake fluid level sensor 5.

Other information:

Kia Optima DL3 2019-2026 Service and Repair Manual: Walk-in Switch

Components and components location Component Location 1. Walk-in switch Repair procedures Removal    When prying with a flat-tip screwdriver or use a prying trim tool, wrap it with protective tape, and apply prote

Kia Optima DL3 2019-2026 Service and Repair Manual: Air Conditioning System

General safety information and caution Instructions (R-134a) When Handling Refrigerant 1. R-134a liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized frostbite. When handling the refrigerant, be sure to wear gloves.

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