Kia Optima 2011 Owner's Manual page 326

Maintenance
Replace the filter according to the
Maintenance Schedule.
If the vehicle is operated in extremely
dusty or sandy areas, replace the ele-
ment more often than the usual recom-
mended intervals.
"Maintenance under severe usage condi-
tions" in this section.)
7 24
CAUTION
• Do not drive with the air cleaner
removed; this will result in exces-
sive engine wear.
(Refer to
• When removing the air cleaner fil-
ter, be careful that dust or dirt
does not enter the air intake, or
damage may result.
• Use a KIA genuine part. Use of
nongenuine part could damage
the air flow sensor.