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 ...

Interior Refinement
The style makeover continues into the Optima's cabin with expanded electronics melded with refreshed fascia patterns and color schemes. Based on a new platform, the standard audio system features ...

Windows
Power windows (if equipped) (1) Driver’s door power window switch (2) Front passenger’s door power window switch (3) Rear door (left) power window switch* (4) Rear door (right) power windo ...