2005 SUBARU IMPREZA WRX Owners Manual

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Driving tips
and trailer are acceptable.
T Total trailer weight
Total trailer weight
The total trailer weight (trailer weight plus its cargo
load) must never exceed the maximum weight shown
in the following table.
HS8016AA
Model Conditions Maximum to- tal trailer weight
MT models When towing a trailer with- out brakes. 1,000 lbs
(453 kg)
When towing a trailer with
brakes. 2,000 lbs
(906 kg)
AT models When towing a trailer with- out brakes. 1,000 lbs
(453 kg)
When towing a trailer with
brakes. 2,000 lbs
(906 kg)
When towing a trailer on a
long uphill grade continu-
ously for over 5 miles (8 km)
with an outside temperature
of 104 °F (40 °C) or above. 1,000 lbs
(453 kg)

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Driving tips
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TGross Vehicle Weight (GVW) and Gross Vehicle
Weight Rating (GVWR)
Gross Vehicle Weight
The Gross Vehicle Weight (GVW) must never exceed
the Gross Vehicle Weight Rating (GVWR).
Gross Vehicle Weight (GVW) is the combined total of
the weight of the vehicle, driver, passengers, luggage,
trailer hitch, trailer tongue load and any other optional
equipment installed on your vehicle. Therefore, the
GVW changes depending on the situation. Determine
the GVW each time before going on a trip by putting
your vehicle and trailer on a vehicle scale. Certification label
GVWR is shown on the certification plate located on
the driver’s side door jamb of your vehicle.
HG8017AA
UGB510CA

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Driving tips
T
Gross Axle Weight (GAW) and Gross Axle
Weight Rating (GAWR)
Gross Axle Weight
The total weight applied to each axle (GAW) must nev-
er exceed the Gross Axle Weight Rating (GAWR). The
front and rear GAWs can be adjusted by relocating
passengers and luggage inside the vehicle. The front
and rear GAWR are also shown on the certification
plate. Certification label
To check both GVWR and GAWR and to confirm that
the total weight and weight distribution are within safe
driving limits, you should have your vehicle and trailer
weighed at a commercial weighing station.
Be sure that all cargo is firmly secured to prevent a
change in weight distribution while driving.
HG8018AA
UGB510CA

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TTongue load
Tongue load
Ensure that the trailer tongue load is from 8 to 11 per-
cent of the total trailer weight and does not exceed the
maximum value of 200 lbs (90 kg). 1) Jack
2) Bathroom scale
The tongue load can be weighed with a bathroom
scale as shown in the following illustration. When
weighing the tongue load, be sure to position the tow-
ing coupler at the height at which it would be during ac-
tual towing, using a jack as shown.
HS8019AA
1 2
HS8020BB

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Driving tips
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; approximate-
ly 60 percent of the trailer load should be in the front
and approximately 40 percent in the rear. Also, distrib-
ute the load as evenly as possible on both the left and
right sides.
Be sure that all cargo is firmly secured to prevent a
change in weight distribution while driving.
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, espe-
cially during braking or when vehicle speed is
reduced during cornering, resulting in over-
steer, spin out and/or jackknifing.
„ Trailer hitches
Choose a proper hitch for your vehicle and trailer.
Never drill the frame or under-body of your ve-
hicle to install a commercial trailer hitch. If you
do, dangerous exhaust gas, water or mud may
enter the passenger compartment through the
drilled hole. Exhaust gas contains carbon mon-
oxide, a colorless and odorless gas which is
dangerous, or even lethal, if inhaled. Also, drill-
ing the frame or under-body of your vehicle
could cause deterioration of strength of your
vehicle and cause corrosion around the drilled
hole.
F
60% 40% 50%
50%
HS8021BB

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Driving tips
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yDo not modify the vehicle exhaust system,
brake system, or other systems when installing
a hitch or other trailer towing equipment. y Do not use axle-mounted hitches as they can
cause damage to the axle housing, wheel bear-
ings, wheels or tires.
T WAGON including OUTBACK SPORT
The use of a genuine SUBARU trailer hitch is recom-
mended. A genuine SUBARU hitch is available from
your SUBARU dealer.
If use of a non-genuine hitch is unavoidable, be sure
the hitch is suited to your vehicle and trailer. Consult
with a professional hitch supplier to assist you in
choosing an appropriate hitch for your vehicle. Be sure
to follow all of the hitch manufacturer’s instructions for
installation and use.
Never use a hitch that mounts only to the rear bumper.
The bumper is not designed to handle that type of
load.
For all types of hitches, regularly check that the hitch
mounting bolts and nuts are tight. T
SEDAN
SUBARU does not offer accessory trailer hitches.
Consult with a professional hitch supplier to assist you
in choosing an appropriate hitch for your vehicle. Be
sure to follow all of the hitch manufacturer’s instruc-
tions for installation and use.
Never use a hitch that mounts only to the rear bumper.
The bumper is not designed to handle that type of
load.
Regularly check that the hitch mounting bolts and nuts are tight. „ Connecting a trailer
T Trailer brakes
If your trailer’s total weight (trailer weight plus its cargo
weight) exceeds 1,000 lbs (453 kg), the trailer is re-
quired to be equipped with its own brake system. Elec-
tric brakes or surge brakes are recommended, and
must be installed properly. Check that your trailer’s
brakes conform with Federal, state/province and/or
other applicable regulations. Your SUBARU’s brake
system is not designed to be tapped into the trailer’s hydraulic brake system.
Please ask your SUBARU dealer and professional
trailer supplier for more information about the trailer’s brake system.

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Driving tips
y
Adequate size trailer brakes are required
when the trailer and its cargo exceed 1,000 lbs
(453 kg) total weight. y Do not directly connect your trailer’s hydrau-
lic brake system to the hydraulic brake system
in your vehicle. Direct connection would cause
the vehicle’s brake performance to deteriorate
and could lead to an accident.
T Trailer safety chains
In case the trailer hitch connector or hitch ball should
break or become disconnected, the trailer could get
loose and create a traffic safety hazard.
For safety, always connect the towing vehicle and
trailer with trailer safety chains. Pass the chains cross-
ing each other under the trailer tongue to prevent the
trailer from dropping onto the ground in case the trailer
tongue should disconnect from the hitch ball. Allow
sufficient slack in the chains taking tight-turn situations
into account; however, be careful not to let them drag
on the ground.
For more information about the safety chain connec-
tion, refer to the instructions for your hitch and trailer.
Always use safety chains between your vehicle
and the trailer. Towing a trailer without safety
chains could create a traffic safety hazard if the
trailer separates from the hitch due to coupling
damage or hitch ball damage.
T Side mirrors
After hitching a trailer to your vehicle, check that the
standard side mirrors provide a good rearward field of
view without significant blind spots. If significant blind
spots occur with the vehicle’s standard side mirrors,
HG8019BA

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use towing mirrors that conform with Federal, state/
province and/or other applicable regulations. TTrailer lights
Connection of trailer lights to your vehicle’s electrical
system requires modifications to the vehicle’s lighting
circuit to increase its capacity and accommodate wir-
ing changes. To ensure the trailer lights are connected
properly, please consult your SUBARU dealer. Check
for proper operation of the turn signals, the brake
lights and parking lights each time you hitch up.
Direct splicing or other improper connection of
trailer lights may damage your vehicle’s electri-
cal system and cause a malfunction of your ve-
hicle’s lighting system.
T Tires
Make sure that all the tires on your vehicle are properly
inflated to the pressure specified on the tire placard lo-
cated on the left center pillar of your vehicle.
Trailer tire condition, size, load rating and proper infla-
tion pressure should be in accordance with the trailer
manufacturer’s specifications. In the event your vehicle gets a flat tire when towing a
trailer, ask a commercial road service to repair the flat
tire.
If you carry a regular size spare tire in your vehicle or
trailer as a precaution against getting a flat tire, be
sure that the spare tire is firmly secured.
Never tow a trailer when the temporary spare
tire is used. The temporary spare tire is not de-
signed to sustain the towing load. Use of the
temporary spare tire when towing can result in
failure of the spare tire and/or less stability of
the vehicle.
„ Trailer towing tips
yNever exceed 45 mph (72 km/h) when towing
a trailer in hilly country on hot days. y When towing a trailer, steering, stability,
stopping distance and braking performance
will be different from normal operation. For
safety’s sake, you should employ extra caution