Subaru IMPREZA 2002 Owner's Manual page 345

Maintenance and service
B Turbo models
1) Air cleaner case cover
2) Air cleaner element
11-20
HGA003BA
HGA004BC
1. Unsnap the two clamps holding the air cleaner
case cover.
2. Open the air cleaner case cover and remove the
air cleaner element.
3. Clean the inside of the air cleaner cover and
case with a damp cloth and install a new air cleaner
element.
4. To install the air cleaner case cover, insert three
projections on the air cleaner case into the slits on
the air cleaner case cover and then snap the two
clamps on the air cleaner case cover.