Spark Plugs; Recommended Spark Plugs - Subaru WRX STI Owner's Manual

1) Air cleaner case
2) Air cleaner case cover
2. Open the air cleaner case and pull the
cover rearward while lifting it up.
3. Remove the air cleaner element.
4. Clean the inside of the air cleaner case
and case cover with a damp cloth and
install a new air cleaner element.
5. To install the air cleaner case cover,
insert the projections on the air cleaner
case cover into the slits on the air cleaner
case. The illustration above shows an
example in which the projections are not
fitted into the slits correctly.
6. Install in the reverse order of removal.
I n f o r ma t i o n P r o v i d e d b y :
Maintenance and service/Spark plugs

Spark plugs

It may be difficult to replace the spark
plugs. It is recommended that you have
the spark plugs replaced by your
SUBARU dealer.
The spark plugs should be replaced
according to the maintenance schedule
in the Warranty and Maintenance Book-
let .

Recommended spark plugs

For the recommended spark plugs, refer
to Electrical system 12-8.
11-21