See also:

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 ...

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 ...

Overview
The fourth-generation Kia Rio, revealed at the 2011 Geneva Motor Show, boasts a bold and distinctive personality, bringing the latest model into line with the rest of Kia's striking design-led pro ...