Kia Optima: Tire ReplacementIf the tire is worn evenly, a tread wear indicator will appear as a solid band 1/2 inch wide (12.7 mm) across the the tread. This shows there is less than 1/16 inch (1.6 mm) of tread left on the tire. Replace the tire when this happens.
Do not wait for the band to appear across the entire tread before replacing the tire.

Tire Rotation
Compact Spare Tire ReplacementCup holder
WARNING - Hot liquids
Do not place uncovered cups of hot liquid in the cup holder while the
vehicle is in motion. If the hot liquid spills, you may burn yourself. Such
a burn to the driver ...
Fuel Filter. Repair procedures
Replacement
1.
Remove the fuel pump (Refer to “Fuel Pump” in this
group).
2.
Disconnect the electric pump wiring connector (A)
and the fuel sender conn ...
Installation of a Mobile Two-Way Radio System
If a mobile two-way radio system is installed improperly, or if an excessively
powerful type of system is used, other electronic systems may be adversely affected.
To avoid damage to your vehicle, ...