2004 SUBARU IMPREZA WRX suspension

1-30
Seat, seatbelt and SRS airbags
bly or scrapping the entire car damaged by a
collision, consult your SUBARU dealer. "
Tampering with or disconnecting the sys-
tem’s wiring could result in accidental activa-
tion of the seatbelt pretensioner and/or SRS air-
bag or could make the system inoperative,
which may result in serious injury. The wiring
harnesses of the seatbelt pretensioner and SRS
airbag systems are covered with yellow insula-
tion and the connectors of the system are yel-
low for easy identification. Do not use electrical
test equipment on any circuit related to the
seatbelt pretensioner and SRS airbag systems.
For required servicing of the seatbelt preten-
sioner, see your nearest SUBARU dealer.
The front sub sensors are located in both front
fenders and the SRS airbag control module in-
cluding the impact sensors is located under the
center console. If you need service or repair in
those areas or near the front seatbelt retrac-
tors, we recommend that you have an autho-
rized SUBARU dealer perform the work.
NOTE
If the front part of the vehicle is damaged in an ac-
cident to the extent that the seatbelt pretensioner
does not operate, contact your SUBARU dealer as
soon as possible. ! Precautions against vehicle modifica- tion
Always consult your SUBARU dealer if you want to in-
stall any accessory parts to your vehicle.
Do not perform any of the following modifica-
tions. 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
SUBARU genuine accessory parts to the front
end." Modification of the suspension system or
front end structure." Installation of a tire of different size and con-
struction from the tires specified on the tire
placard attached to the driver’s door jamb.

1-75
Seat, seatbelt and SRS airbags
– CONTINUED –
with SRS side airbags only) "Replacement of seat fabric or leather (for
vehicles with SRS side airbags only) " Installation of additional fabric or leather
on the front seat (for vehicles with SRS side
airbags only)
" Installation of additional electrical/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 inter-
fere with proper operation of the SRS airbag
system.
Do not perform any of the following modifica-
tions. Such modifications can interfere with
proper operation of the SRS airbag system." Attachment of any equipment (brush bar,
winches, snow plow, skid plate, etc.) other than
SUBARU genuine accessory parts to the front
end. " Modification of the suspension system or
front end structure. " Installation of a tire of different size and con-
struction from the tires specified on the tire placard attached to the driver’s door jamb. "
Attachment of any equipment (side steps or
side sill protectors, etc.) other than SUBARU
genuine accessory parts to the side body (for
vehicles with side airbags only).
Always consult your SUBARU dealer if you want to in-
stall any accessory parts to your vehicle.

8-11
Driving tips
– CONTINUED –
operating it off-road and not using common sense pre-
cautions 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.Winter driving ! Operation during cold weather
Carry some emergency equipment, such as tire
chains, a window scraper, a bag of sand, flares, a
small shovel, and jumper cables.
Check the battery and cables. Cold temperatures re-
duce battery capacity. The battery must be in good
condition to provide enough power for cold winter starts.
Use an engine oil of proper grade and viscosity for
cold weather. Heavy summer oil will cause harder
UG8030AA

8-12
Driving tips
starting.
Keep the door locks from freezing by squirting them
with deicer or glycerin.
Forcing a frozen door open may damage or separate
the rubber weather strips around the door. If the door
is frozen, use hot water to melt the ice, and afterwards
thoroughly wipe the water away.
Use a windshield washer fluid that contains an anti-
freeze solution. Do not use engine antifreeze or other
substitutes because they may damage the paint of the
vehicle. !
Before driving your vehicle
Before entering the vehicle, remove any snow or ice
from your shoes because that could make the pedals
slippery and 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 po-
sition. Instead, observe the following:
1. Place the shift lever in “1” or “R” for manual trans-
mission vehicles, and in “P” for automatic transmission
vehicles.
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 damageto 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 andABS harness.
Snow can trap dangerous exhaust gases under
your vehicle. Keep snow clear of the exhaust

8-16
Driving tips
dent.
Your vehicle is equipped with “summer tires” as origi-
nal equipment, which are inadequate for driving on
slippery roads such as on snow-covered or icy roads.
Compared with winter and all-season tires, summer
tires give significantly less grip on snowy and icy road
surfaces. Therefore, use of winter tires is strongly rec-
ommended when driving with such road conditions.
When you choose to install winter tires on your vehi-
cle, be sure to use the correct tire size and type. You
must install four winter tires that are of the same size,
construction, brand and load range and you should
never mix radial, belted bias or bias tires since this
may result in dangerous handling characteristics.
When you choose a tire, make sure that there is
enough clearance between the tire and vehicle body.
Remember to drive with care at all times regardless of
the type of tires on your vehicle. ! Tire chains
Driving on snowy grades or icy roads may require the
use of tire chains, in which case put the chains on the
front wheels only. Use only SAE class S type chains
that are of the correct size for your tires so as not to damage the vehicle body or suspension.
When driving with tire chains, drive at speeds below
19 mph (30 km/h).
When a temporary spare tire is on a front wheel, re-
place the temporary spare tire with the rear tire on the
same side of the vehicle, and then fit chains on the
front tires.
Always use the utmost care when driving with tire
chains — overconfidence because you are driving
with tire chains could easily lead to a serious accident.
Tire chains cannot be used on tires listed below
because of lack of clearance between the tires
and vehicle body. "
225/45R17 tires for WRX-STi
"Optional 215/45R17 tires for WRX
! Rocking the vehicle
If you must rock the vehicle to free it from snow, sand,
or mud, depress the accelerator pedal slightly and
move the selector lever back and forth between “D”
and “R” repeatedly. Do not race the engine. For the
best possible traction, avoid spinning the wheels when

8-29
Driving tips
– CONTINUED –
Trailer towing
Your car is designed and intended to be used primarily
as a passenger-carrying vehicle. Towing a trailer puts
additional loads on your car’s engine, drivetrain,
brakes, tires and suspension and has an adverse ef-
fect on fuel economy.
If you do decide to tow a trailer, your safety and satis-
faction depend upon proper use of correct equipment
and cautious operation of your vehicle. Seek the ad-
vice of your SUBARU dealer to assist you in purchas-
ing a hitch and other necessary towing equipment ap-
propriate for your vehicle. In addition, be sure to follow
the instructions on correct installation and use provid-
ed by the trailer and other towing equipment manufac-
turers.
SUBARU assumes no responsibility for injuries or ve-
hicle damage that result from trailer towing equipment,
or from any errors or omissions in the instructions ac-
companying such equipment or for your failure to fol-
low the proper instructions. !Warranties and maintenance
SUBARU warranties do not apply to vehicle damage
or malfunction caused by trailer towing. If you use your
vehicle to tow a trailer, more frequent maintenance will
be required due to the additional load. (Refer to “Main- tenance schedule under severe driving conditions” in
the “Warranty and Maintenance Booklet”.)
Under no circumstances should a trailer be towed with
a new vehicle or a vehicle with any new powertrain
component (engine, transmission, differential, wheel
bearings, etc.) for the first 1,000 miles (1,600 km) of
driving. !
Maximum load limits
Never exceed the maximum load limits ex-
plained below. Exceeding the maximum load
limits could cause personal injury and/or vehi-
cle damage.
"Adequate size trailer brakes are required
when the trailer and its cargo exceed 1,000 lbs
(453 kg) total weight." Before towing a trailer, check the trailer total
weight, GVW, GAWs and tongue load. Make
sure the load and its distribution in your vehicle

9-20
In case of emergency
"
Use only the specified towing hook and tie-
down hook. Never use suspension parts or oth-
er body parts for towing or tie-down purposes." Never use the tie-down hook on the under-
side of the vehicle closest to the muffler for
towing purposes.
! Using a flat-bed truck
This is the best way to transport your vehicle. Use the
following procedures to ensure safe transportation. 1. Shift the selector lever into the “P” position for au-
tomatic transmission vehicles or “1st” for manual
transmission vehicles.
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.
If your vehicle has a front underspoiler 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.
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10-2
Appearance care
Appearance careExterior care !
Washing
The best way to preserve your vehicle’s beauty is fre-
quent washing. Wash the vehicle at least once a
month to avoid contamination by road grime.
Wash dirt off with a wet sponge and plenty of luke-
warm or cold water. Do not wash the vehicle with hot
water and in direct sunlight.
Salt, chemicals, insects, tar, soot and bird droppings
should be washed off by using a light detergent, as re-
quired. If you use a light detergent, make certain that
it is a neutral detergent. Do not use strong soap or
chemical detergents. All cleaning agents should be
promptly flushed from the surface and not allowed to
dry there. Rinse the vehicle thoroughly with plenty of
lukewarm water. Wipe the remaining water off with a
chamois or soft cloth.
NOTE
When having your vehicle washed in an automatic
car wash, make sure beforehand that the car wash
is of suitable type. Automatic car wash brushes or
other equipment may damage the rear wiper and
rear/roof spoiler (if equipped).
" When washing the vehicle, the brakes may
get wet. As a result, the brake stopping dis-
tance will be longer. To dry the brakes, drive the
vehicle at a safe speed while lightly pressing
the brake pedal to heat up the brakes. " Do not wash the engine compartment and
area adjacent to it. If water enters the engine air
intake, electrical parts or the power steering flu-
id reservoir, it will cause engine trouble or
faulty power steering respectively.
! Washing the underbody
Chemicals, salts and gravel used for deicing road sur-
faces are extremely corrosive, accelerating the corro-
sion of underbody components, such as the exhaust
system, fuel and brake lines, brake cables, floor pan
and fenders, and suspension.
Thoroughly flush the underbody and inside of the
fenders with lukewarm or cold water at frequent inter-
vals to reduce the harmful effects of such agents.
Mud and sand adhering to the underbody components may accelerate their corrosion.
After driving off-road or on muddy or sandy roads,
wash the mud and sand off the underbody. Carefully