2007 SUBARU IMPREZA WRX air filter

Ventilator.............................................................. 4-2
Air flow selection ................................................ 4-2
Center and side ventilators .................................. 4-3
Manual climate control system (if equipped) ..................................................... 4-3
Control panel ...................................................... 4-3
Heater operation ................................................. 4-5
Air conditioner operation (if equipped) ...................................................... 4-7
Automatic climate control system (if equipped) ..................................................... 4-8
Control panel ...................................................... 4-8
To use as full-automatic climate control system .............................................................. 4-8
To use as semi-automatic climate control system .............................................................. 4-8
Fan speed control dial ......................................... 4-9
Temperature control dial ...................................... 4-9
Air flow control dial ............................................. 4-9 Air inlet selection button
.................................... 4-10
Air conditioner button ........................................ 4-10
Temperature sensors ......................................... 4-11
Operating tips for heater and air conditioner ...................................................... 4-11
Cleaning ventilation grille ................................... 4-11
Efficient cooling after parking in direct sunlight ........................................................... 4-11
Lubrication oil circulation in the refrigerant circuit .............................................................. 4-12
Checking air conditioning system before summer season ............................................................ 4-12
Cooling and dehumidifying in high humidity and low temperature weather conditions ................. 4-12
Air conditioner compressor shut-off when engine is heavily loaded .............................................. 4-12
Refrigerant for your climate control system ... ..... 4-12
Air filtration system ........................................... 4-12
Replacing the air filter ........................................ 4-13Climate control
4

4-12Climate control
heated interior. This results in quicker
cooling by the air conditioner. Keep the
windows closed during the operation of
the air conditioner for maximum cooling
efficiency. &Lubrication oil circulation in
the refrigerant circuit
Operate the air conditioner compressor at
a low engine speed (at idle or low driving
speeds) a few minutes each month during
the off-season to circulate its oil. & Checking air conditioning
system before summer sea-son
Check the air conditioner unit for refriger-
ant leaks, hose conditions and proper
operation of each spring. Have your
SUBARU dealer perform this check. & Cooling and dehumidifying in
high humidity and low tem-
perature weather conditions
Under certain weather conditions (high
relative humidity, low temperatures, etc.) a
small amount of water vapor emission
from the air outlets may be noticed. This
condition is normal and does not indicate
any problem with the air conditioningsystem. &
Air conditioner compressor
shut-off when engine is
heavily loaded
To improve acceleration and gas mileage,
the air conditioner compressor is designed
to temporarily shut off during air condi-
tioner operation whenever the accelerator
is fully depressed such as during rapid
acceleration or when driving on a steepupgrade. & Refrigerant for your climate
control system
Your air conditioner uses ozone friendly
refrigerant HFC134a. Therefore, the meth-
od of adding, changing or checking the
refrigerant is different from the method for
CFC12 (Freon). Consult your SUBARU
dealer for service. Repairs needed as a
result of using the wrong refrigerant are
not covered under warranty. Air filtration system
If your vehicle
’s air conditioning system is
equipped with an air filtration system,
replace the filter element according to
the replacement schedule shown in the
following. This schedule should be fol-
lowed to maintain the filter ’s dust collec-
tion ability. Under extremely dusty condi-
tions, the filter should be replaced more
frequently. It is recommended that you
have your filter checked or replaced by
your SUBARU dealer. For replacement,
use only a genuine SUBARU air filter kit.
Replacement schedule: Every 12 months or 7,500 miles (12,000
km) whichever comes first

&Replacing the air filter
1. Remove the glove box.
(1) Open the glove box.
(2) Remove the nine screws and the
one clip securing the glove box.
(3) Disconnect the glove box light
connector.
2. Unhook the hooks of the air filter cover
and remove the cover.
3. Draw out the air filter element.
4. Replace the air filter element with new one.
CAUTION
The arrow mark on the filter must
point down.
5. Reinstall the air filter cover.
6. Connect the connector, and reinstall
the glove box.
7. Close the glove box. Climate control
4-13
– CONTINUED –

4-14Climate control
1) Service label
2) Caution label
8. LABEL installation (1) Fill out the information on the
service label (small).
(2) Attach the service label to the
driver side door pillar and the caution
label to the driver side end of the
instrument panel.
CAUTION
Contact your dealer if the following
occurs, even if it is not yet time to
change the filter: . Reduction of the air flow through
the vents.
. Windshield gets easily fogged or
misted.
NOTE
The filter can influence the air condi-
tioning, heating and defroster perfor-
mance if not properly maintained.

Maintenance schedule....................................... 11-3
Maintenance precautions ................................... 11-3
Before checking or servicing in the engine compartment .................................................... 11-4
When you do checking or servicing in the engine compartment while the engine is running .......... 11-4
Engine hood ....................................................... 11-4
Engine compartment overview .......................... 11-6
Non-turbo models .............................................. 11-6
Turbo models ..................................................... 11-7
Engine oil ............................................................ 11-8
Checking the oil level ......................................... 11-8
Changing the oil and oil filter .............................. 11-9
Recommended grade and viscosity .................. 11-11
Recommended grade and viscosity under severe driving conditions .......................................... 11-12
Synthetic oil ..................................................... 11-12
Cooling system ................................................ 11-12
Cooling fan, hose and connections ................... 11-12
Engine coolant ................................................. 11-13
Air cleaner element .......................................... 11-15
Replacing the air cleaner element ..................... 11-15
Spark plugs ...................................................... 11-17
Recommended spark plugs .............................. 11-18
Drive belts ........................................................ 11-18
Manual transmission oil .................................. 11-19
Checking the oil level ....................................... 11-19
Recommended grade and viscosity .................. 11-20
Automatic transmission fluid .......................... 11-20
Checking the fluid level .................................... 11-20 Recommended fluid
......................................... 11-21
Front differential gear oil (AT vehicles) .......... 11-21
Checking the oil level ...................................... 11-21
Recommended grade and viscosity .................. 11-22
Rear differential gear oil .................................. 11-22
Checking the gear oil level ............................... 11-22
Recommended grade and viscosity .................. 11-23
Power steering fluid ........................................ 11-24
Checking the fluid level .................................... 11-24
Recommended fluid ......................................... 11-25
Brake fluid ........................................................ 11-25
Checking the fluid level .................................... 11-25
Recommended brake fluid ............................... 11-26
Clutch fluid (MT vehicles) ............................... 11-26
Checking the fluid level .................................... 11-26
Recommended clutch fluid ............................... 11-27
Brake booster .................................................. 11-27
Brake pedal ...................................................... 11-27
Checking the brake pedal free play .................. 11-27
Checking the brake pedal reserve distance....... 11-28
Clutch pedal (MT vehicles) .............................. 11-28
Checking the clutch function ............................ 11-28
Checking the clutch pedal free play .................. 11-28
Replacement of brake pad and lining ............ 11-29
Breaking-in of new brake pads and linings ....... 11-29
Parking brake stroke ....................................... 11-30
Tires and wheels .............................................. 11-30
Types of tires ................................................... 11-30
Tire inspection ................................................. 11-30
Tire pressures and wear .................................. 11-31
Maintenance and service
11

a fire. If engine coolant gets on
the exhaust pipe, be sure to wipe
it off.
. Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface.
6. Pour the coolant and fill to the reser-
voir tank ’s “FULL ”level mark.
1) Rubber gaskets
7. Put the radiator cap back on and
tighten firmly. At this time, make sure that
the rubber gasket in the radiator cap is
correctly in place.
8. Start and run the engine for more than
five minutes at 2,000 to 3,000 rpm.
9. Stop the engine and wait until the coolant cools down (122 to 140
8F [50 to
60 8C]). If there is any loss of coolant, add
coolant to the radiator ’s filler neck and to
the reserve tank ’s “FULL ”level.
10. Put the radiator cap and reservoir cap
back on and tighten firmly. Air cleaner element
The air cleaner element functions as a
filter screen. When the element is perfo-
rated or removed, engine wear will be
excessive and engine life shortened.
The air cleaner element is a viscous type.
It is unnecessary to clean or wash theelement.
WARNING
Do not operate the engine with the
air cleaner element removed. The air
cleaner element not only filters
intake air but also stops flames if
the engine backfires. If the air
cleaner element is not installed
when the engine backfires, you
could be burned.
& Replacing the air cleaner element
Replace the air cleaner element according
to the maintenance schedule in the“ Warranty and Maintenance Booklet ”. Un-
der extremely dusty conditions, replace it
more frequently. It is recommended that
you always use genuine SUBARU parts. Maintenance and service
11-15
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