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 ReplacementInstallation
1.
Installation is the reverse of
removal.
•
When installing, apply
the ATF oil or white vas ...
Inspection
Measuring Resistance
1.
Disconnect the cruise control switch connector from
the control switch.
2.
Measure resistance between terminals on the con ...
Changing the coolant
Have the coolant changed by an authorized
Kia dealer according to the
Maintenance Schedule at the beginning
of this section.
CAUTION
Put a thick cloth or fabric around
the radiator cap befo ...