2007 SUBARU IMPREZA change wheel

Instruments and controlsLight control switch ........................................... 3-22
Headlights. ......................................................... 3-22
High/low beam change (dimmer) ......................... 3-23
Headlight flasher ................................................ 3-23
Daytime running light system ............................. 3-23
Turn signal lever ................................................ 3-24
Illumination brightness control ......................... 3-25
Headlight beam leveler (U.S.-spec. WRX-STI) .......................................................... 3-25
Parking light switch ........................................... 3-25
Front fog light button (if equipped) .................. 3-26Wiper and washer
.............................................. 3-26
Windshield wiper and washer switches .............. 3-27
Rear window wiper and washer switch –
Wagon ............................................................. 3-28
Rear window defogger button .......................... 3-29
Windshield wiper deicer (if equipped) .............. 3-30
Intercooler water spray switch (WRX-STI) ....... 3-31
Mirrors ................................................................ 3-32
Inside mirror ...................................................... 3-32
Outside mirrors ................................................. 3-33
Tilt steering wheel ............................................. 3-35
Horn .................................................................... 3-35

dealer.
The driver ’s control center differential
allows you to freely change the degree
of limitation of the differential action
(limited slip differential (LSD) torque) of
your vehicle ’s center differential.
By using the center differential control dial,
you can set an initial LSD torque to match
the road surface conditions, driving con-
ditions and your driving style.
1) LSD torque
2) Traction torque
A) Initial LSD torque (adjustable)
B) Mechanical LSD torque &
Auto mode
In the auto mode, the system estimates
the driving and road conditions using
signals from the wheel speed sensor,
throttle position sensor, steering angle
sensor and brake switch, etc. According
to the result, it electronically and auto-
matically controls the degree of limitation
of the differential action (LSD torque) to
optimize the differential action of the
center differential. When the ignition
switch is turned ON, the “AUTO ”indicator
light in the combination meter comes on.
The system can be switched to a manual mode. &
Manual mode
In the manual mode, you can use the
center differential control dial to adjust the
initial LSD torque as desired. When this
mode is selected, the “AUTO ”indicator
light in the combination meter goes off. ! Manual switch
Press the “DCCD-MANU ”switch on the
center console to switch from auto mode
to manual mode. The “AUTO ”indicator
light in the combination meter will go off.
Press the switch again to go back to auto
mode. The “AUTO ”indicator light in the
combination meter will come on. Starting and operating
7-13
– CONTINUED –

7-14Starting and operating
!Center differential control dial and
indicator light
The control dial is located beside the
parking brake lever. By turning the control
dial forward and rearward, it is possible to
change the initial LSD torque.
The center differential indicator lights in
the combination meter give six levels of
indication. The indicator lights and control
dial are linked; when the dial is turned to
change the initial LSD torque, the illumi-
nation position of the indicator lights
changes accordingly.
Turn the dial forward to increase the initial
LSD torque; when the white line on the
dial reaches the frontmost position, the
initial LSD torque setting is maximum. The
center differential will then be almost
completely locked and the “LOCK ”indica-
tor light will come on.Turn the dial rearward to reduce the initial
LSD torque; when the white line reaches
the rearmost position, the initial LSD
torque will be minimum and the “
”
indicator light will come on. Under this
condition, only the Mechanical LSD torque
will limit the differential action.
CAUTION
. Do not turn the control dial when
a wheel slippage occurs. Wait
until the wheelspin has been
brought under control.
. Under any of the following con-
ditions, turn the center differen-
tial control dial to the rearmost
position to minimize the initial
LSD torque:

1) Jack
2) Bathroom scale
The tongue load can be weighed with a
bathroom scale as shown in the illustra-
tion. When weighing the tongue load, be
sure to position the towing coupler at the
height at which it would be during actual
towing, using a jack as shown.F: Front of vehicle
The tongue load can be adjusted by
proper distribution of the load in the trailer.
Never load the trailer with more weight in
the back than in the front; approximately
60 percent of the trailer load should be in
the front and approximately 40 percent in
the rear. Also, distribute the load as evenly
as possible on both the left and rightsides.
Be sure that all cargo is firmly secured to
prevent a change in weight distribution
while driving.
WARNING
If the trailer is loaded with more
weight in the back of trailer ’s axle
than in the front, the load is taken off the rear axle of the towing vehicle.
This may cause the rear wheels to
skid, especially during braking or
when vehicle speed is reduced dur-
ing cornering, resulting in over-
steer, spin out and/or jackknifing.
& Trailer hitches
Choose a proper hitch for your vehicle and
trailer.
WARNING
Never drill the frame or under-body
of your vehicle to install a commer-
cial trailer hitch. If you do, danger-
ous exhaust gas, water or mud may
enter the passenger compartment
through the drilled hole. Exhaust
gas contains carbon monoxide, a
colorless and odorless gas which is
dangerous, or even lethal, if inhaled.
Also, drilling the frame or under-
body of your vehicle could cause
deterioration of strength of your
vehicle and cause corrosion around
the drilled hole.
CAUTION
. Do not modify the vehicle ex- Driving tips
8-23
– CONTINUED –

8-26Driving tips
safety’s sake, you should employ
extra caution when towing a
trailer and you should never
speed. You should also keep the
following tips in mind:
! Before starting out on a trip
. Check that the vehicle and vehicle-to-
hitch mounting are in good condition. If
any problems are apparent, do not tow the
trailer. . Check that the vehicle sits horizontally
with the trailer attached. If the vehicle is
tipped sharply up at the front and down at
the rear, check the total trailer weight,
GVW, GAWs and tongue load again, then
confirm that the load and its distribution
are acceptable. . Check that the tire pressures are
correct.. Check that the vehicle and trailer are
connected properly. Confirm that
–the trailer tongue is connected
properly to the hitch ball. – the trailer lights connector is con-
nected properly and trailer ’s brake
lights illuminate when the vehicle ’s
brake pedal is pressed, and that the trailer ’s turn signal lights flash when
the vehicle ’s turn signal lever is oper-
ated. –
the safety chains are connected
properly. – all cargo in the trailer is secured
safely in position.– the side mirrors provide a good
rearward field of view without a sig-
nificant blind spot.
. Sufficient time should be taken to learn
the “feel ”of the vehicle/trailer combination
before starting out on a trip. In an area free
of traffic, practice turning, stopping and
backing up. ! Driving with a trailer
. You should allow for considerably more
stopping distance when towing a trailer.
Avoid sudden braking because it may
result in skidding or jackknifing and loss ofcontrol. . Avoid abrupt starts and sudden accel-
erations. If your vehicle has a manual
transmission, always start out in first gear
and release the clutch at moderate engine revolution. . Avoid uneven steering, sharp turns and
rapid lane changes.. Slow down before turning. Make a
longer than normal turning radius because
the trailer wheels will be closer than the
vehicle wheels to the inside of the turn. In
a tight turn, the trailer could hit yourvehicle. .
Crosswinds will adversely affect the
handling of your vehicle and trailer, caus-
ing sway. Crosswinds can be due to
weather conditions or the passing of large
trucks or buses. If swaying occurs, firmly
grip the steering wheel and slow down
immediately but gradually. . When passing other vehicles, consid-
erable distance is required because of the
added weight and length caused by
attaching the trailer to your vehicle.
1) Left turn
2) Right turn
. Backing up with a trailer is difficult and
takes practice. When backing up with a
trailer, never accelerate or steer rapidly.
When turning back, grip the bottom of the
steering wheel with one hand and turn it to
the left for a left turn, and turn it to the right

11-34Maintenance and service
When you install a tire that has the tire
rotation direction mark, install the tire with
the direction mark facing forward. & Tire rotation
Vehicles equipped with unidirectional tires
1) Front
Vehicles equipped with 4 non-unidirec-
tional 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 (12,500
km). Move the tires to the positions shown
in the illustration each time they arerotated.
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 correctlytightened.
After driving approximately 600 miles
(1,000 km), check the wheel nuts again
and retighten any nut that has become loose. &
Tire replacement
The 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
. All four tires must be the same in
terms of manufacturer, brand
(tread pattern), construction, de-
gree of wear, speed symbol, load
index and size. Mixing tires of
different types, sizes or degrees
of wear can result in damage tovehicle ’s powertrain. Use of dif-
ferent types or sizes of tires can
also dangerously reduce con-
trollability and braking perfor-
mance and can lead to an acci- dent.
. 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 replacement
When 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 anaccident.
NOTE
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 driv-
ing approximately 600 miles (1,000 km).
If any nut is loose, tighten it to the
specified torque. Aluminum wheels
Aluminum 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.. Be sure to fit tire chains on uniformly
and completely around the tire, otherwise
the chains may scratch the wheel. . When wheel nuts, balance weights, or
the center cap is replaced, be sure to
replace them with genuine SUBARU parts
designed for aluminum wheels. Maintenance and service
11-35

12-2Specifications
Specifications
These specifications are subject to change without notice. &Dimensions
in (mm)
Item Sedan Wagon
2.5-liter
non-turbo 2.5-liter turbo 2.5-liter non-turbo 2.5-liter turbo
2.5i WRX WRX-STI 2.5i OUTBACK SPORTWRX
Drive system AWD
Transmission type AT MT AT MT AT MT AT MT AT MT
Overall length 175.8 (4,465)
Overall width Sedan 68.5 (1,740) –
Wagon –66.7 (1,695) 67.3 (1,710) 66.7 (1,695)
Overall height Without roofrail 56.7 (1,440) 56.3 (1,430) 57.7 (1,465) 58.1 (1,475) 57.7 (1,465)
With roofrail –58.5 (1,485) 58.9 (1,495) 58.5 (1,485)
Wheel base 99.4 (2,525)
Tread Front 58.5 (1,485) 58.7 (1,490) 57.7 (1,465) 57.5 (1,460) 57.7 (1,465)
Rear 58.1 (1,475)
58.3 (1,480) 58.9 (1,495) 57.3 (1,455)
Ground clearance*
16.3 (160) 5.7 (145)6.3 (160)
6.7 (170) 6.3 (160)
*1: Measured with vehicle empty
AT: Automatic transmission
MT: Manual transmission