2012 SUBARU IMPREZA WRX STI service

Black plate (358,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
11-28
Maintenance and service
NOTEThe suspension system is designed to
hold each wheel at a certain alignment
(relative to the other wheels and to the
road) for optimum straight-line stability
and cornering performance.& Wear indicators1) New tread
2) Worn tread
3) Tread wear indicatorEach tire incorporates a tread wear
indicator, which becomes visible when
the depth of the tread grooves decreases
to 0.063 in (1.6 mm). A tire must be
replaced when the tread wear indicator
appears as a solid band across the tread.
WARNING
When a tire ’s tread wear indicator
becomes visible, the tire is worn
beyond the acceptable limit and
must be replaced immediately. With
a tire in this condition, driving at
high speeds in wet weather can
cause the vehicle to hydroplane.
The resulting loss of vehicle control
can lead to an accident.NOTEFor safety, inspect tire tread regularly
and replace the tires before their tread
wear indicators become visible.
& Tire rotation direction markExample of tire rotation direction mark
1) FrontIf the tire has the rotation direction
specification, the tire rotation direction
mark is placed on its sidewall.
When you install a tire that has the tire
rotation direction mark, install the tire with
the direction mark facing forward.

Black plate (359,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Tire rotationVehicles equipped with 4 non-unidirec-
tional tires
1) FrontVehicles equipped with unidirectional tires
1) Front
Tire wear varies from wheel to wheel. To
maximize the life of each tire and ensure
that the tires wear uniformly, it is best to
rotate the tires every 7,500 miles (12,000
km). Move the tires to the positions shown
in the illustration each time they are
rotated.
Replace any damaged or unevenly worn
tires at the time of rotation. After tire
rotation, adjust the tires pressures and
make sure the wheel nuts are correctly
tightened.
After driving approximately 600 miles
(1,000 km), check the wheel nuts again
and retighten any nut that has become
loose.&Tire replacementThe wheels and tires are important and
integral parts of your vehicle ’s design;
they cannot be changed arbitrarily. The
tires fitted as standard equipment are
optimally matched to the characteristics
of the vehicle and were selected to give
the best possible combination of running
performance, ride comfort, and service
life. It is essential for every tire to have a
size and construction matching those
shown on the tire placard and to have a
speed symbol and load index matching
those shown on the tire placard. Using tires of a non-specified size detracts
from controllability, ride comfort, braking
performance, speedometer accuracy and
odometer accuracy. It also creates incor-
rect body-to-tire clearances and inappro-
priately changes the vehicle’
s ground
clearance.
All four tires must be the same in terms of
manufacturer, brand (tread pattern), con-
struction, and size. You are advised to
replace the tires with new ones that are
identical to those fitted as standard equip-
ment.
For safe vehicle operation, SUBARU
recommends replacing all four tires at
the same time.
WARNING
. When replacing a tire, you must
use a tire that is of the same size,
circumference, construction,
brand (tread pattern), speed sym-
bol and load index as the original
tires listed on the tire placard.
Using tires of other sizes, cir-
cumferences or constructions
may result in severe mechanical
damage to the drive train of your
vehicle and may affect ride,
handling, braking, speedometer/
odometer calibration, and clear-
Maintenance and service
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Black plate (360,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
11-30
Maintenance and service
ance between the body and tires.
It also may be dangerous and
lead to loss of vehicle control.
. You must install four tires that are
of the same size, circumference,
construction, manufacturer,
brand (tread pattern), degree of
wear, speed symbol and load
index. Mixing tires of different
types, sizes or degrees of wear
can result in damage to the
vehicle’ s power train. Use of
different types or sizes of tires
can also dangerously reduce
controllability and braking per-
formance and can lead to an
accident.
. Use only radial tires. Do not use
radial tires together with belted
bias tires and/or bias-ply tires.
Doing so can dangerously re-
duce controllability, resulting in
an accident.
& Wheel replacementWhen replacing wheels due, for example,
to damage, make sure the replacement
wheels match the specifications of the
wheels that are fitted as standard equip-
ment. Replacement wheels are available from SUBARU dealers.
WARNING
Use only those wheels that are
specified for your vehicle. Wheels
not meeting specifications could
interfere with brake caliper opera-
tion and may cause the tires to rub
against the wheel well housing dur-
ing turns. The resulting loss of
vehicle control could lead to an
accident.NOTEWhen any of the wheels are removed
and replaced for tire rotation or to
change a flat tire, always check the
tightness of the wheel nuts after driv-
ing approximately 600 miles (1,000 km).
If any nut is loose, tighten it to the
specified torque.
Aluminum wheelsAluminum wheels can be scratched and
damaged easily. Handle them carefully to
maintain their appearance, performance,
and safety.
.
When any of the wheels are removed
and replaced for tire rotation or to change
a flat tire, always check the tightness of
the wheel nuts after driving approximately
600 miles (1,000 km). If any nut is loose,
tighten it to the specified torque.
. Never apply oil to the threaded parts,
wheel nuts, or tapered surface of the
wheel.
. Never let the wheel rub against sharp
protrusions or curbs.
. When wheel nuts, balance weights, or
the center cap is replaced, be sure to
replace them with genuine SUBARU parts
designed for aluminum wheels.

Black plate (361,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
Windshield washer fluidIf you spray washer fluid on the windshield
but the supply of washer fluid appears to
diminish, check the level of washer fluid in
the tank.
Washer fluid level gaugeRemove the washer tank filler cap, then
check the fluid level indicated by the level
gauge (attached to the inside of the cap).
If the level is near the “Low”mark, add
fluid until it reaches the “Hi”level on the level gauge or the
“FULL”mark on the
tank.
Use windshield washer fluid. If windshield
washer fluid is unavailable use clean
water.
In areas where water freezes in winter,
use an anti-freeze type windshield washer
fluid. SUBARU Windshield Washer Fluid
contains 58.5% methyl alcohol and 41.5%
surfactant, by volume. Its freezing tem-
perature varies according to how much it
is diluted, as indicated in the following
table.
Washer Fluid
Concentration Freezing
Temperature
30% 10.48F( 12 8C)
50% 48F( 20 8C)
100% 498F( 45 8C)
CAUTION
Never use engine coolant as washer
fluid because it could cause paint
damage.
In order to prevent freezing of washer
fluid, check the freezing temperatures in
the table above when adjusting the fluid
concentration to the outside temperature.
If you fill the reservoir tank with a fluid with
Maintenance and service
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Black plate (362,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
11-32
Maintenance and service
a different concentration from the one
used previously, purge the old fluid from
the piping between the reservoir tank and
washer nozzles by operating the washer
for a certain period of time. Otherwise, if
the concentration of the fluid remaining in
thepipingistoolowfortheoutside
temperature, it may freeze and block the
nozzles.
CAUTION
. Adjust the washer fluid concen-
tration appropriately for the out-
side temperature. If the concen-
tration is inappropriate, sprayed
washer fluid may freeze on the
windshield and obstruct your
view, and the fluid may freeze in
the reservoir tank.
. State or local regulations on
volatile organic compounds may
restrict the use of methanol, a
common windshield washer anti-
freeze additive. Washer fluids
containing non-methanol anti-
freeze agents should be used
only if they provide cold weather
protection without damaging
your vehicle ’s paint, wiper blades
or washer system.
Replacement of wiper bladesGrease, wax, insects, or other material on
the windshield or the wiper blade results in
jerky wiper operation and streaking on the
glass. If you cannot remove the streaks
after operating the windshield washer or if
the wiper operation is jerky, clean the
outer surface of the windshield (or rear
window) and the wiper blades using a
sponge or soft cloth with a neutral
detergent or mild-abrasive cleaner. After
cleaning, rinse the windshield and wiper
blades with clean water. The windshield is
clean if beads do not form when you rinse
the windshield with water.
CAUTION
. Do not clean the wiper blades
with gasoline or a solvent, such
as paint thinner or benzine. This
will cause deterioration of the
wiper blades.
. While removing the wiper blades
from the wiper arms, do not
return the wiper arms to the
original positions. Otherwise,
the windshield surface may be
scratched.
. When returning the raised wiper
arms to the original positions, carefully return the wiper arms
on the windshield by hand. You
should not return the wiper arms
to the windshield only by the
return spring. Otherwise, the wi-
per arms may be deformed and/
or the windshield surface may be
scratched.
If you cannot eliminate the streaking even
after following this method, replace the
wiper blades using the following proce-
dures.

Black plate (363,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Windshield wiper blade as-
sembly! Type A
1. Raise the wiper arm off the windshield.1) Stopper2. Remove the wiper blade assembly by
holding its pivot area and pushing it in the
direction shown by the arrow while de-
pressing the wiper blade stopper.
3. Install the wiper blade assembly to the
wiper arm. Make sure that it locks in place.
4. Hold the wiper arm by hand and slowly
lower it in position. !
Type B
1. Raise the wiper arm off the windshield.
1) Open the cover
2) Pull down the wiper blade2. Remove the wiper blade assembly by
opening the cover and pulling it down in
the direction shown in the illustration.
3. Install the wiper blade assembly to the
wiper arm. Make sure that it locks in place.
4. Hold the wiper arm by hand and slowly
lower it in position.
& Windshield wiper blade rub-
ber (type A and type B)
NOTEThe following illustrations show the
replacement procedures of the blade
rubber for a type A wiper blade assem-
bly, however the replacement proce-
dures are the same for a type B wiper
blade assembly.1) Metal support1. Grasp the locked end of the blade
rubber assembly and pull it firmly until the
stoppers on the rubber are free of the
metal support.
Maintenance and service
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Black plate (364,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
11-34
Maintenance and service
1) Metal spines2. If the new blade rubber is not provided
with two metal spines, remove the metal
spines from the old blade rubber and
install them in the new blade rubber.3. Align the claws of the metal support with the grooves in the rubber and slide
the blade rubber assembly into the metal
support until it locks.
1) Stopper4. Be sure to position the claws at the
end of the metal support between the
stoppers on the rubber as shown. If the
rubber is not retained properly, the wiper
blade may scratch the windshield.NOTEThe illustration shows the replacement
procedure for type A rubber wiper
blades, however the replacement pro-
cedure is the same for type B. Perform
the replacement of type B wiper blades
following the procedure in this section.
&
Rear window wiper blade
assembly (5-door models)1. Raise the wiper arm off the rear
window.2. Turn the wiper blade assembly coun-
terclockwise.

Black plate (365,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
3. Pull the wiper blade assembly toward
you to remove it from the wiper arm.
4. Install the wiper blade assembly to the
wiper arm. Make sure that it locks in place.
5. Hold the wiper arm by hand and slowly
lower it in position.
& Rear window wiper blade
rubber (5-door models)1. Pull out the end of the blade rubber
assembly to unlock it from the plastic
support.
2. Pull the blade rubber assembly out of
the plastic support.1) Metal spines3. If the new blade rubber is not provided
with two metal spines, remove the metal
spines from the old blade rubber and
install them in the new blade rubber.
Maintenance and service
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