See also:

Engine coolant
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 ...

Air cleaner
Element cleaning This element may be air cleaned or replaced, depending on its condition. Unless it is very dirty, merely shake it to remove foreign particles. Each time this filter is inspecte ...

DRIVER-ORIENTED INTERIOR DESIGN
With the 2011 Optima, Kia has made big strides forward in the use of cabin materials, while interior layout and design are also strong points. Much like how the exterior conveys a dramatic message ...