Dodge Challenger 2018 Owner's Manual page 343

Filter Access Cover
3. Remove the used filter.
4. Install the new filter with arrows pointing in the direc-
tion of airflow, which is toward the rear of the vehicle
(text and arrows on the filter will indicate this).
SERVICING AND MAINTENANCE 341
A/C Air Filter
5. Close the filter access cover.
Refer to "Scheduled Servicing" in this section for the
proper maintenance intervals.
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