2019 Kia Optima EXFACTORY OEM SERVICE PROCEDURE

Repair Procedures: Removal

  1. Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
  2. Remove the battery.

    (Refer to Engine Electrical System - "BATTERY ")

  3. Remove the air cleaner assembly and air intake hose.

    (Refer to Engine Mechanical System - "AIR CLEANER ")

  4. Remove the engine wiring.
    1. Disconnect the OCV connector (A) and EWGA extension connector (B).
      G12915395Courtesy of KIA MOTORS AMERICA, INC.
    2. Remove the engine wiring mounting bolts and then remove the engine wiring harness (A).
    G12915396Courtesy of KIA MOTORS AMERICA, INC.
  5. Remove the vacuum pipe mounting bolts and make a gap by moving the bracket.
  6. Disconnect the engine coolant temperature sensor connector.
  7. Remove the engine coolant temperature sensor (A).
    G12915397Courtesy of KIA MOTORS AMERICA, INC.
    CAUTION: Note that engine coolant may be flowed out from the water temperature control assembly when removing the sensor.
  8. Fill with engine coolant.

    (Refer to Engine Mechanical System - "COOLANT ")

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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