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:

Installing a child restraint on a front passenger’s seat is forbidden
Never place a rear-facing child restraint in the front passenger’s seat. If the air bag deploys, it would impact the rear-facing child restraint, causing serious or fatal injury. In addition, ...

Yaw-rate and Lateral G Sensor. Repair procedures
Removal 1. Turn ignition switch OFF and disconnect the negative (-) battery cable. 2. Remove the floor console. (Refer to the Body group - Console) 3. ...

MAX A/C MODE
When you select the MAX A/C mode (switch indicator illuminates) while the fan speed is on, it will be set the system automatically as follows; - the air conditioning system will be turned on. - ...

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