See also:

Engine cooling system
The high-pressure cooling system has a reservoir filled with year-round antifreeze coolant. The reservoir is filled at the factory. Check the antifreeze protection and coolant level at least once ...

Owner maintenance
inspections that should be performed by the owner or an authorized KIA dealer at the frequencies indicated to help ensure safe, dependable operation of your vehicle. Any adverse conditions should ...

Safety-Minded
As with the rest of the Kia line-up, the 2009 Kia Optima is equipped with many safety features as standard equipment. This includes six airbags (dual advanced front and front-seat mounted side as ...