2011 SUBARU IMPREZA WRX STI suspension

Black plate (51,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
system inoperative, which may
result in serious injury. Do not
use electrical test equipment on
any circuit related to the seatbelt
pretensioner and SRS airbag
systems. For required servicing
of the seatbelt pretensioner, con-
sult your nearest SUBARU deal-
er.
CAUTION
The front sub sensors are located
on both the right and left sides at the
front of the vehicle, and the SRS
airbag control module including the
impact sensors is located under the
center console. If you need service
or repair in those areas or near the
front seatbelt retractors, have the
work performed by your authorized
SUBARU dealer.NOTEIf the front part of the vehicle is
damaged in an accident to the extent
that the seatbelt pretensioner does not
operate, contact your SUBARU dealer
as soon as possible.
& Precautions against vehicle
modificationAlways consult your SUBARU dealer if
you want to install any accessory parts to
your vehicle.
CAUTION
Do not perform any of the following
modifications. Such modifications
can interfere with proper operation
of the seatbelt pretensioners.
. Attachment of any equipment
(bush bar, winches, snow plow,
skid plate, etc.) other than genu-
ine SUBARU accessory parts to
the front end.
. Modification of the suspension
system or front end structure.
. Installation of a tire of different
size and construction from the
tires specified on the vehicle
placard attached to the driver ’s
door pillar or specified for indivi-
dual vehicle models in this Own-
er ’s Manual.
Child restraint systemsInfants and small children should always
be placed in an infant or child restraint
system in the rear seat while riding in the
vehicle. You should use an infant or child
restraint system that meets Federal Motor
Vehicle Safety Standards or Canada
Motor Vehicle Safety Standards, is com-
patible with your vehicle and is appro-
priate for the child ’s age and size. All child
restraint systems are designed to be
secured in vehicle seats by lap belts or
the lap belt portion of a lap/shoulder belt
(except those described in “Installation of
child restraint systems by use of lower and
tether anchorages (LATCH) ”F 1-29).
Children could be endangered in an
accident if their child restraints are not
Seat, seatbelt and SRS airbags
1-21
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1

Black plate (74,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
1-44
Seat, seatbelt and SRS airbags
lift the front passenger ’s seat cushion
using his/her feet.
. Do not place any article under the front
passenger ’s seat, or squeeze any article
from behind and under the seat. This may
lift the seat cushion.
. Do not squeeze any article between
the front passenger ’s seat and side trim/
pillar, door or center console box. This
may lift the seat cushion.
! If the passenger ’s frontal airbag OFF
indicator illuminates and the ON
indicator turns off even when the
front passenger ’s seat is occupied
by an adult
This can be caused by the adult incor-
rectly sitting in the front passenger ’s seat.
Turn the ignition switch to the “LOCK”
position. Ask the front passenger to set
the seatback to the upright position, sit up
straight in the center of the seat cushion,
correctly fasten the seatbelt, position his/
her legs out forward, and adjust the seat to
the rearmost position. Turn the ignition
switch to the “ON”position. If the OFF
indicator remains illuminated while the ON
indicator remains off, take the following
actions.
. Turn the ignition switch to the “LOCK”
position.
. Ensure that there are no articles, books, shoes, or other objects trapped
under the seat, at the rear of the seat, or
on the side of the seat.
.
Ensure that the backward-forward po-
sition and seatback of front passenger ’s
seat are locked into place securely by
moving the seat back and forth.
. Next, turn the ignition switch to the
“ON ”position and wait 6 seconds to allow
the system to complete self-checking.
Following the system check, both indica-
tors turn off for 2 seconds. Now, the ON
indicator should illuminate while the OFF
indicator remains off.
If the OFF indicator still remains illumi-
nated while the ON indicator remains off,
ask the occupant to move to the rear seat
and immediately contact your SUBARU
dealer for an inspection.
! Effect vehicle modifications made
for persons with disabilities may
have on SUBARU advanced frontal
airbag system operation (U.S. only)
Changing or moving any parts of the front
seats, rear seat, seatbelts, front bumper,
front side frame, radiator panel, instrument
panel, combination meter, steering wheel,
steering column, tire, suspension or floor
panel can affect the operation of the
SUBARU advanced airbag system. If
you have any questions, you may contact the following SUBARU distributors.
of Columbia>
Subaru of America, Inc.
Customer Dealer Services Department
P.O. Box 6000
Cherry Hill, NJ 08034-6000
1-800-SUBARU3 (1-800-782-2783)

Servco Subaru Inc., dba Subaru Hawaii
2850 Pukoloa Street, Suite 202, Honolulu,
HI 96819
808-839-2273

Shen
’s Corporation dba Prestige Automo-
bile
491, East Marine Drive, Route 1 Dededo,
Guam
671-633-2698

Trebol Motors
P.O. Box 11204, San Juan, Puerto Rico
00910
787-793-2828
There are currently no SUBARU distribu-
tors in any other U.S. territories. If you are
in such an area, please contact the
SUBARU distributor or dealer from which

Black plate (88,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
1-58
Seat, seatbelt and SRS airbags
This includes following modifica-
tions.
. Installation of custom steering
wheels
. Attachment of additional trim
materials to the dashboard
. Installation of custom seats
. Replacement of seat fabric or
leather
. Installation of additional fabric or
leather on the front seat
. Attachment of a hands-free mi-
crophone or any other accessory
to a front pillar, a center pillar, a
rear pillar, the windshield, a side
window, an assist grip, or any
other cabin surface that would be
near a deploying SRS curtain
airbag.
. Installation of additional electri-
cal/electronic equipment such as
a mobile two-way radio on or
near the SRS airbag system
components and/or wiring is not
advisable. This could interfere
with proper operation of the
SRS airbag system.
CAUTION
Do not perform any of the following
modifications. Such modifications
can interfere with proper operation
of the SRS airbag system.
. Attachment of any equipment
(bush bar, winches, snow plow,
skid plate, etc.) other than genu-
ine SUBARU accessory parts to
the front end.
. Modification of the suspension
system or front end structure.
. Installation of a tire of different
size and construction from the
tires specified on the vehicle
placard attached to the driver ’s
door pillar or specified for indivi-
dual vehicle models in this Own-
er ’s Manual.
. Attachment of any equipment
(side steps or side sill protectors,
etc.) other than genuine SUBARU
accessory parts to the side body.
Always consult your SUBARU dealer if
you want to install any accessory parts on
your vehicle.

Black plate (303,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
that full vehicle control will be
maintained at all times and under
all conditions, its activation
should be seen as a sign that
the speed of the vehicle should
be reduced considerably.
. Whenever suspension compo-
nents, steering components, or
an axle are removed from a
vehicle, have an inspection of
that system performed by an
authorized SUBARU dealer.
. The following precautions should
be observed in order to ensure
that the Vehicle Dynamics Con-
trol system is operating properly:
– All four wheels should be
fitted with tires of the same
size, type, and brand. Further-
more, the amount of wear
should be the same for all
four tires.
– Keep the tire pressure at the
proper level as shown on the
vehicle placard attached to
the driver ’s side door pillar.
– Use only the specified tem-
porary spare tire to replace a
flat tire. With a temporary
spare tire, the effectiveness
of the Vehicle Dynamics Con- trol system is reduced and
this should be taken into ac-
count when driving the vehi-
cle in such a condition.
. If non-matching tires are used,
the Vehicle Dynamics Control
system may not operate cor-
rectly.
. The Vehicle Dynamics Control
system helps prevent unstable
vehicle motion such as skidding
using control of the brakes and
engine power. Do not turn off the
Vehicle Dynamics Control sys-
tem unless it is absolutely ne-
cessary. If you must turn off the
Vehicle Dynamics Control sys-
tem, drive very carefully based
on the road surface condition.
In the event of wheelspin and/or skidding
on a slippery road surface and/or during
cornering and/or an evasive maneuver,
the Vehicle Dynamics Control system
adjusts the engine ’s output and the
wheels’ respective braking forces to help
maintain traction and directional control.
. Traction Control Function
The traction control function is designed to
prevent spinning of the driving wheels on
slippery road surfaces, thereby helping to
maintain traction and directional control. Activation of this function is indicated by
steady illumination of the Vehicle Dy-
namics Control operation indicator light.
.
Skid Suppression Function
The skid suppression function is designed
to help maintain directional stability by
suppressing the wheels’ tendency to slide
sideways during steering operations. Acti-
vation of this function is indicated by
flashing of the Vehicle Dynamics Control
operation indicator light.
NOTE. The Vehicle Dynamics Control sys-
tem may be considered normal when
the following conditions occur.
–Slight twitching of the brake
pedal is felt.
– The vehicle or steering wheel
shakes to a small degree.
– An operating sound from the
engine compartment is heard
briefly when starting the engine
and when driving off after starting
the engine.
– The brake pedal seems to jolt
when driving off after starting the
engine.
. In the circumstances listed in the
following, the vehicle may be more
unstable than it feels to the driver.
Starting and operating
7-35
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7

Black plate (323,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
cially at higher speeds.
. Do not grip the inside or spokes of the
steering wheel. A bad bump could jerk the
wheel and injure your hands. Instead drive
with your fingers and thumbs on the
outside of the rim.
. If driving through water, such as when
crossing shallow streams, first check the
depth of the water and the bottom of the
stream bed for firmness and ensure that
the bed of the stream is flat. Drive slowly
and completely through the stream. The
water should be shallow enough that it
does not reach the vehicle’ s undercar-
riage. Water entering the engine air intake
or the exhaust pipe or water splashing
onto electrical parts may damage your
vehicle and may cause it to stall. Never
attempt to drive through rushing water;
regardless of its depth, it can wash away
the ground from under your tires, resulting
in possible loss of traction and even
vehicle rollover.
. Always check your brakes for effec-
tiveness immediately after driving in sand,
mud or water. Do this by driving slowly
and stepping on the brake pedal. Repeat
that process several times to dry out the
brake discs and brake pads.
. Do not drive or park over or near
flammable materials such as dry grass or
fallen leaves, as they may burn easily. The exhaust system is very hot while the
engine is running and right after the
engine stops. This could create a fire
hazard.
.
After driving through tall grass, mud,
rocks, sand, rivers, etc., check that there
is no grass, bush, paper, rags, stones,
sand, etc. adhering to or trapped on the
underbody. Clear off any such matter from
the underbody. If the vehicle is used with
these materials trapped or adhering to the
underbody, a mechanical breakdown or
fire could occur.
. Secure all cargo carried inside the
vehicle and make certain that it is not
piled higher than the seatbacks. During
sudden stops or jolts, unsecured cargo
could be thrown around in the vehicle and
cause injury. Do not pile heavy loads on
the roof. Those loads raise the vehicle’ s
center of gravity and make it more prone
to tip over.
. If you must rock the vehicle to free it
from sand or mud, depress the accelerator
pedal slightly and move the select lever
back and forth between “D ” and “R ”
repeatedly. Do not race the engine. For
the best possible traction, avoid spinning
the wheels when trying to free the vehicle.
When the road surface is extremely
slippery, you can obtain better traction by
starting the vehicle with the transmission in 2nd than 1st (both for MT and AT).
.
Never equip your vehicle with tires
larger than those specified in this manual.
. Frequent driving of an AWD model
under hard-driving conditions such as
rough roads or off roads will necessitate
more frequent replacement of engine oil,
brake fluid and transmission oil than that
specified in the maintenance schedule
described in the “Warranty and Mainte-
nance Booklet ”.
Remember that damage done to your
SUBARU while operating it off-road and
not using common sense precautions
such as those listed above is not eligible
for warranty coverage.
. Wash the vehicle’ s underbody after off-
road driving. Suspension components are
particularly prone to dirt buildup, so they
need to be washed thoroughly.
Driving tips
8-7
8

Black plate (325,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
! Before driving your vehicle
Before entering the vehicle, remove any
snow or ice from your shoes because that
could make the pedals slippery and
driving dangerous.
While warming up the vehicle before
driving, check that the accelerator pedal,
brake pedal, and all other controls operate
smoothly.
Clear away ice and snow that has
accumulated under the fenders to avoid
making steering difficult. During severe
winter driving, stop when and where it is
safe to do so and check under the fenders
periodically.
! Parking in cold weather
Do not use the parking brake when
parking for long periods in cold weather
since it could freeze in that position.
Instead, you should observe the following
tips.
1. Place the shift lever in “1 ” or “R”for MT
models, or the select lever in “P”for AT
models.
2. Use tire stops under the tires to
prevent the vehicle from moving.
When the vehicle is parked in snow or
when it snows, raise the wiper blades off
the glass to prevent damage to them. When the vehicle has been left parked
after use on roads heavily covered with
snow, or has been left parked during a
snowstorm, icing may develop on the
brake system, which could cause poor
braking action. Check for snow or ice
buildup on the suspension, disc brakes
and brake hoses underneath the vehicle.
If there is caked snow or ice, remove it,
being careful not to damage the disc
brakes and brake hoses and ABS har-
ness.
WARNING
Snow can trap dangerous exhaust
gases under your vehicle. Keep
snow clear of the exhaust pipe and
from around your vehicle if you park
the vehicle in snow with the engine
running.
! Refueling in cold weather
To help prevent moisture from forming in
the fuel system and the risk of its freezing,
use of an antifreeze additive in the fuel
tank is recommended during cold weather.
Use only additives that are specifically
designed for this purpose. When an
antifreeze additive is used, its effect lasts
longer if the tank is refilled whenever the
fuel level reaches half empty. If your SUBARU is not going to be used
for an extended period, it is best to have
the fuel tank filled to capacity.
&
Driving on snowy and icy
roadsTo prevent skidding and slipping, avoid
sudden braking, abrupt acceleration, high-
speed driving, and sharp turning when
driving on snowy or icy roads.
Always maintain ample distance between
your vehicle and the vehicle ahead of you
to avoid the need for sudden braking.
To supplement the foot brake, use the
engine brake effectively to control the
vehicle speed. (Shift into a lower gear
when necessary.)
Avoid shifting down abruptly. Such beha-
vior can cause the wheels to lock, possibly
leading to loss of vehicle control.
An anti-lock brake system (ABS) en-
hances your vehicle ’s braking perfor-
manceonsnowyandicyroads.For
information on braking on slippery sur-
faces, refer to “ABS (Anti-lock Brake
System) ”F 7-32 and “Vehicle Dynamics
Control system ”F 7-34.
WARNING
Do not use the cruise control on
slippery roads such as snowy or icy
Driving tips
8-9
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8

Black plate (346,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
9-14
In case of emergency
TowingIf towing is necessary, it is best done by
your SUBARU dealer or a commercial
towing service. Observe the following
procedures for safety.
WARNING
Never tow AWD models (both AT and
MT) with the front wheels raised off
the ground while the rear wheels are
on the ground, or with the rear
wheels raised off the ground while
the front wheels are on the ground.
This will cause the vehicle to spin
away due to the operation or dete-
rioration of the center differential.
& Towing and tie-down hooksThe towing hooks should be used only in
an emergency (e.g., to free a stuck vehicle
from mud, sand or snow).
CAUTION
. Use only the specified towing
hook and tie-down hook. Never
use suspension parts or other
parts of the body for towing or
tie-down purposes.
. To prevent deformation to the
front bumper and the towing
hook, do not apply excessive
lateral load to the towing hook.
Front towing hook (non-turbo models):
1. Take the towing hook out of the tool
bucket and take the screwdriver out of the
tool bag. Take the jack handle out of the
trunk (4-door) or cargo area (5-door).
2. Pry off the cover on the front bumper
using a screwdriver, and you will find a
threaded hole for attaching the towing
hook.3. Screw the towing hook into the thread
hole until its thread can no longer be seen.

Black plate (349,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
Rear tie-down hooks:The rear tie-down hooks are located near
each of the jack-up reinforcements.
WARNING
Use the rear tie-down hooks only for
downward anchoring. If they are
used to anchor the vehicle in any
other direction, cables may slip off
the hooks, possibly causing a dan-
gerous situation.
& Using a flat-bed truckThis is the best way to transport your
vehicle. Use the following procedures to
ensure safe transportation.
1. Shift the select lever into the “P ”
position for AT models. Shift the shift lever
into the “1st”position for MT models.
2. Pull up the parking brake lever firmly.
3. Secure the vehicle onto the carrier
properly with safety chains. Each safety
chain should be equally tightened and
care must be taken not to pull the chains
so tightly that the suspension bottoms out.
CAUTION
If your vehicle has a front under-
spoiler and rear underspoiler (both
optional), be careful not to scrape
them when placing the vehicle on
the carrier and when removing the
vehicle from the carrier.& Towing with all wheels on the
ground1. Release the parking brake and put the
transmission in the “N”/neutral position.
2. The ignition switch should be in the
“Acc ”position while the vehicle is being
towed.
3. Take up slack in the towline slowly to
prevent damage to the vehicle.
In case of emergency
9-17
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9