Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2016 Kia Optima HybridFACTORY OEM SERVICE PROCEDURE

Repair Procedures: Removal

Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
Drain the engine coolant. (Refer to Refilling And Bleeding . ).
Remove the radiator upper hose. (Refer to Repair Procedures . )
Disconnect the knock sensor connector (A).

Fig 1: Locating Knock Sensor Connector
Courtesy of KIA MOTORS AMERICA, INC.
Remove the intake manifold. (Refer to Removal And Installation .)
Remove the mounting bolt (A), and then remove the sensor from the cylinder block.

Fig 2: Locating Knock Sensor Mounting Bolt

Courtesy of KIA MOTORS AMERICA, INC.

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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