Polaris RZR RS1 2021 Owner's Manual For Maintenance And Safety page 120

MAINTENANCE
7. Reinstall the air filter (if clean) or install a new air filter (if soiled). Do not
attempt to clean the air filter.
Use of a non-POLARIS-approved air filter may cause engine damage. Always
use a POLARIS-approved replacement filter. Replacement filters are available
8. Make sure that there are no gaps between the filter, the filter ring and the
stop on the intake tube.
9. Reinstall the air box cover and ensure the hinge is properly aligned.
10. Secure the cover clips.
11. Reinstall the access panel.
118
NOTICE
at your POLARIS dealer.