2012 SUBARU IMPREZA WRX STI brake

Black plate (351,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Checking the brake pedal
reserve distance1) More than 2.56 in (65 mm)Depress the pedal with a force of approxi-
mately 66 lbf (294 N, 30 kgf) and measure
the distance between the upper surface of
the pedal pad and the floor.
When the measurement is smaller than
the specification, or when the pedal does
not operate smoothly, contact with your
SUBARU dealer.
Clutch pedalCheck the clutch pedal free play and
reserve distance according to the main-
tenance schedule in the “Warranty and
Maintenance Booklet ”.&Checking the clutch functionCheck the clutch engagement and disen-
gagement.
1. With the engine idling, check that there
are no abnormal noises when the clutch
pedal is depressed, and that shifting into
1st or reverse feels smooth.
2. Start the vehicle by releasing the pedal
slowly to check that the engine and
transmission smoothly couple without
any sign of slippage.
&Checking the clutch pedal
free play1) 0.16 –0.43 in (4.0 –11.0 mm)Lightly depress the clutch pedal down with
your finger until you feel resistance, and
check the free play.
If the free play is not within proper
specification, contact your SUBARU deal-
er.
Maintenance and service
11-21
11

Black plate (352,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
11-22
Maintenance and service
Hill start assist systemEnsure that the Hill start assist system
operates properly under the following
circumstances:
1. Stop the vehicle on an uphill grade by
depressing the brake pedal and clutch
pedal, with the engine running.
2. Make sure that the vehicle does not
move backward even after the brake
pedal is released.
3. Then make sure the vehicle starts
climbing the grade by following the normal
starting procedures.
If the Hill start assist system does not
operate as described above, contact with
your SUBARU dealer.
Replacement of brake pad
and liningThe disc brakes have audible wear
indicators on the brake pads. If the brake
pads wear close to their service limit, the
wear indicator makes a very audible
scraping noise when the brake pedal is
applied.
If you hear this scraping noise each time
you apply the brake pedal, have the brake
pads serviced by your SUBARU dealer as
soon as possible.
CAUTION
If you continue to drive despite the
scraping noise from the audible
brake pad wear indicator, it will result in the need for costly brake
rotor repair or replacement.
&
Breaking-in of new brake
pads and liningsWhen replacing the brake pad or lining,
use only genuine SUBARU parts. After
replacement, the new parts must be
broken in as follows.
! Brake pad and lining
While maintaining a speed of 30 to 40
mph (50 to 65 km/h), step on the brake
pedal lightly. Repeat this five or more
times.
! Parking brake lining
1. Drive the vehicle at a speed of
approximately 22 mph (35 km/h).
2. With the parking brake release button
pushed in, pull the parking brake lever
SLOWLY and GENTLY (pulling with a
force of approximately 33.7 lbf [150 N,
15.3 kgf]).
3. Drive the vehicle for approximately
220 yards (200 meters) in this condition.
4. Wait 5 to 10 minutes for the parking
brake to cool down. Repeat this proce-
dure.
5. Check the parking brake stroke. If the
parking brake stroke is out of the specified

Black plate (353,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
range, adjust it by turning the adjusting nut
located on the parking brake lever.Parking brake stroke:
7–8 notches / 45 lbf (200 N, 20.4 kgf)
WARNING
A safe location and situation should
be selected for break-in driving.
CAUTION
Pulling the parking brake lever too
forcefully may cause the rear
wheels to lock. To avoid this, be
certain to pull the lever up slowly
and gently.
Parking brake strokeCheck the parking brake stroke according
to the maintenance schedule in the
“Warranty and Maintenance Booklet ”.
When the parking brake is properly
adjusted, braking power is fully applied
by pulling the lever up 7 to 8 notches
gently but firmly (approximately 45 lbf [200
N, 20.4 kgf]). If the parking brake lever
stroke is not within the specified range,
have the brake system checked and
adjusted at your SUBARU dealer.
Tires and wheels& Types of tiresYou should be familiar with type of tires
present on your vehicle.
! All season tires
All season tires are designed to provide
an adequate measure of traction, handling
and braking performance in year-round
driving including snowy and icy road
conditions. However all season tires do
not offer as much traction performance as
winter (snow) tires in heavy or loose snow
or on icy roads.
All season tires are identified by “ALL
SEASON ”and/or “M+S”(Mud & Snow) on
the tire sidewall.
! Summer tires
Summer tires are high-speed capability
tires best suited for highway driving under
dry conditions.
Summer tires are inadequate for driving
on slippery roads such as on snow-
covered or icy roads.
If you drive your vehicle on snow-covered
or icy roads, we strongly recommend the
use of winter (snow) tires.
When installing winter tires, be sure to
replace all four tires.
Maintenance and service
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11

Black plate (355,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
one minute.
When a tire is replaced, adjustments are
necessary to ensure continued normal
operation of the tire pressure monitoring
system. As with wheel replacement, there-
fore, you should have the work performed
by a SUBARU dealer.
WARNING
If the low tire pressure warning light
does not illuminate briefly after the
ignition switch is turned ON or the
light illuminates steadily after blink-
ing for approximately one minute,
you should have your Tire Pressure
Monitoring System checked at a
SUBARU dealer as soon as possi-
ble.
If this light illuminates while driving,
never brake suddenly and keep
driving straight ahead while gradu-
ally reducing speed. Then slowly
pull off the road to a safe place.
Otherwise an accident involving
serious vehicle damage and serious
personal injury could occur.
If this light still illuminates while
driving after adjusting the tire pres-
sure, a tire may have significant
damage and a fast leak that causes
the tire to lose air rapidly. If you have a flat tire, replace it with a spare tire
as soon as possible.
When a spare tire is mounted or a
wheel rim is replaced without the
original pressure sensor/transmitter
being transferred, the low tire pres-
sure warning light will illuminate
steadily after blinking for approxi-
mately one minute. This indicates
the TPMS is unable to monitor all
four road wheels. Contact your
SUBARU dealer as soon as possible
for tire and sensor replacement and/
or system resetting. If the light
illuminates steadily after blinking
for approximately one minute,
promptly contact a SUBARU dealer
to have the system inspected.
&
Tire inspectionCheck on a daily basis that the tires are
free from serious damage, nails, and
stones. At the same time, check the tires
for abnormal wear.
Contact your SUBARU dealer immedi-
ately if you find any problem.NOTE. When the wheels and tires strike
curbs or are subjected to harsh treat-
ment as when the vehicle is driven on a rough surface, they can suffer damage
that cannot be seen with the naked eye.
This type of damage does not become
evident until time has passed. Try not
to drive over curbs, potholes or on
other rough surfaces. If doing so is
unavoidable, keep the vehicle
’s speed
down to a walking pace or less, and
approach the curbs as squarely as
possible. Also, make sure the tires are
not pressed against the curb when you
park the vehicle.
. If you feel unusual vibration while
driving or find it difficult to steer the
vehicle in a straight line, one of the
tires and/or wheels may be damaged.
Drive slowly to the nearest authorized
SUBARU dealer and have the vehicle
inspected.
& Tire pressures and wearMaintaining the correct tire pressures
helps to maximize the tires ’service lives
and is essential for good running perfor-
mance. Check and, if necessary, adjust
the pressure of each tire (including the
spare) at least once a month (for example,
during a fuel stop) and before any long
journey.
Maintenance and service
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11

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 (373,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
1) View from driver ’s left-hand side
2) View from driver ’s right-hand side4. Remove the bulb.
5. Replace the bulb with a new one.
6. After replacing the bulb, reattach the
mud guard.
& Rear combination lights! 4-door models1. Remove the clip from the rear trunk
trim with a screwdriver.
2. Open the rear portion of the side trunk
trim panel.
1) Brake/tail and rear side marker light
2) Rear turn signal light
3) Back-up light3. Remove the bulb socket from the rear
combination light assembly by turning it
counterclockwise.
4. Pull the bulb out of the bulb socket and
replace it with a new one.
5. Set the bulb socket into the rear
combination light assembly and turn it
clockwise until it locks.
6. Secure the rear trunk trim panel with
the clips.
Maintenance and service
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11

Black plate (385,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Fluids
NOTEEach quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
Fluid Fluid type Fluid capacity
Power steering fluid · SUBARU ATF
·
“Dexron III ”Type Automatic Transmission Fluid 0.7 US qt (0.7 liter, 0.6 Imp qt)
Brake fluid · Genuine SUBARU brake fluid
· FMVSS No. 116, fresh DOT 3 or DOT 4 brake fluid –
Clutch fluid –
For the checking procedures or other details, refer to “Power steering fluid ”F 11-17, “Brake fluid ”F 11-18 or “Clutch fluid ”F 11-19. Specifications
12-7
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12

Black plate (393,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
Wattage Bulb No.
1) High beam headlight 12V-60W 9005 (HB3)
2) Low beam headlight
Models with HID light 12V-35W D2S
Models with halogen light 12V-55W H11
3) Front turn signal/Front side marker light 12V-27/8W 1157NA
4) Map light 12V-8W–
5) Dome light 12V-8W–
6) Front fog light 12V-51W 9006 (HB4)
7) Door step light (STI) 12V-5W 168 (W5W)
8) Trunk room light (4-door) 12V-5W 168 (W5W)
9) High mount stop light (4-door, if equipped) 12V-21W (P21W)
10) Rear turn signal light (4-door) 12V-21W (WY21W)
11 ) Back-up light (4-door) 12V-16W 921
12) Brake/tail and rear side marker light (4-door) 12V-21/5W 7443
(W21/5W)
13) Cargo area light (5-door) 12V-5W–
14) Rear side marker light (5-door) 12V-5W 168 (W5W)
15) Rear turn signal light (5-door) 12V-21W (WY21W)
16) Back-up light (5-door) 12V-21W 7440
17) Licence plate light 12V-5W 168 (W5W)
A) High mount stop light (5-door) ––
B) Brake/tail light (5-door) ––
C) High mount stop light (4-door, if equipped) ––
D) Side turn signal light (if equipped) ––
WARNING
.
Bulbs may become very hot while
illuminated. Before replacing
bulbs, turn off the lights and wait
until the bulbs cool down. Other-
wise, there is a risk of sustaining
a burn injury.
. For models with HID low beam
headlights, observe the following
precautions. Not doing so carries
the risk of an electric shock that
could result in serious injury
because the HID bulbs use an
extremely high voltage.
– Do not replace any headlight
bulbs (both low beam and
high beam) by yourself.
– Do not remove/restore the
headlight assemblies by your-
self.
– Do not remove any headlight-
assembly components by
yourself.
For replacement, contact your SUBARU dealer.
Specifications
12-15
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