Kia Optima: Check spark plugs and ignition 
system - Winter driving - Driving your vehicle - Kia Optima TF 2011-2026 Owners ManualKia Optima: Check spark plugs and ignition system

Inspect your spark plugs as described in section 7 and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or damaged in any way.

Change to "winter weight" oil if necessary
In some climates it is recommended that a lower viscosity "winter weight" oil be used during cold weather. See section 8 for recommendations. If you aren't sure what weight oil y ...

To keep locks from freezing
To keep the locks from freezing, squirt an approved de-icer fluid or glycerine into the key opening. If a lock is covered with ice, squirt it with an approved de-icing fluid to remove the ice. ...

See also:

Chart 2
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Component Location Index
Engine Room 1. Receiver Drier 2. Condenser 3. Service Port (High) 4. Service Port (Low) 5. A/C Pressure Transducer 6. Compressor 7. Expansion Val ...

Inspection
Front Seat Heater Switch 1. Disconnect the negative (-) battery terminal. 2. Remove the floor console upper cover.(Refer to the BD group - "Console") ...

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