Subaru WRX STI (2019 year). Manual - part 24

(393,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Maintenance schedule.......................................... 11-3
Maintenance precautions ..................................... 11-3

Before checking or servicing in the engine

compartment ...................................................... 11-4

When checking or servicing in the engine

compartment ...................................................... 11-5

When checking or servicing in the engine

compartment while the engine is running ............ 11-5

Maintenance tips................................................... 11-6

Removing and reinstalling clips ............................ 11-6

Engine hood .......................................................... 11-9
Engine compartment overview .......................... 11-11

STI...................................................................... 11-11
Except STI .......................................................... 11-12

Engine oil............................................................. 11-13

Engine oil consumption ...................................... 11-13
Checking the oil level.......................................... 11-13
Changing the oil and oil filter .............................. 11-15
Recommended grade and viscosity ..................... 11-15
Synthetic oil........................................................ 11-16

Cooling system ................................................... 11-16

Cooling fan, hose and connections ..................... 11-17
Engine coolant.................................................... 11-17

Air cleaner element............................................. 11-18

Replacing the air cleaner element........................ 11-19

Spark plugs ......................................................... 11-20

Recommended spark plugs ................................. 11-20

Drive belts ........................................................... 11-20

Manual transmission oil......................................11-21

Recommended grade and viscosity..................... 11-21

Continuously variable transmission fluid..........11-22
Front differential gear oil (CVT models) and

rear differential gear oil....................................11-22

Recommended grade and viscosity..................... 11-22

Power steering fluid (STI) ...................................11-22

Checking the fluid level ...................................... 11-22
Recommended fluid............................................ 11-23

Brake fluid............................................................11-23

Checking the fluid level ...................................... 11-23
Recommended brake fluid .................................. 11-24

Clutch fluid (MT models).....................................11-24

Checking the fluid level ...................................... 11-24
Recommended clutch fluid ................................. 11-25

Brake booster ......................................................11-25
Brake pedal ..........................................................11-26

Checking the brake pedal free play ..................... 11-26
Checking the brake pedal reserve distance ......... 11-26

Clutch pedal (MT models)...................................11-27

Checking the clutch function .............................. 11-27
Checking the clutch pedal free play .................... 11-27

Hill start assist system .......................................11-27
Replacement of brake pad and lining ................11-28

Breaking-in of new brake pads (models with

electronic parking brake system) ..................... 11-28

Breaking-in of new brake pads and linings

(models without electronic parking brake
system) ........................................................... 11-28

Maintenance and service

(394,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Parking brake stroke (models without

electronic parking brake system) ................... 11-29

Tires and wheels................................................. 11-29

Types of tires ...................................................... 11-29
Tire pressure monitoring system (TPMS)

(if equipped) ..................................................... 11-30

Tire inspection .................................................... 11-31
Tire pressures and wear...................................... 11-32
Abnormal tire wear .................................................11-
Wear indicators................................................... 11-35
Rotational direction of tires ................................. 11-35
Tire rotation ........................................................ 11-36
Tire replacement ................................................. 11-36
Wheel replacement ............................................. 11-37

Alloy wheels ........................................................ 11-38
Windshield washer fluid ..................................... 11-38
Replacement of wiper blades ............................ 11-39

Windshield wiper blade assembly........................ 11-40
Windshield wiper blade rubber ............................ 11-41

Battery ................................................................. 11-42

Fuses ....................................................................11-43
Installation of accessories ..................................11-44
Replacing bulbs...................................................11-44

Headlights (models with LED headlights) ............ 11-45
High beam headlight (models without LED

headlights) ...................................................... 11-45

Low beam headlight, front side marker light,

parking light and front turn signal light ............ 11-46

Front turn signal light (models with LED

headlights) ...................................................... 11-48

Front fog light (models with the LED front fog

light) ............................................................... 11-49

Front fog light (models without the LED front

fog light) (if equipped) ..................................... 11-49

Rear combination lights...................................... 11-50
License plate light .............................................. 11-51
Other bulbs ........................................................ 11-51

Replacing battery ................................................11-51

Safety precautions.............................................. 11-51
Replacing battery of access key fob ................... 11-52
Replacing transmitter battery .............................. 11-53

Maintenance and service

(395,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Maintenance schedule

U.S. models
The scheduled maintenance items re-
quired to be serviced at regular intervals
are shown in the “Warranty and Mainte-
nance Booklet”. For details, read the
separate “Warranty and Maintenance
Booklet”.

Canada models
The scheduled maintenance items re-
quired to be serviced at regular intervals
are shown in the “Warranty and Service
Booklet”. For details, read the separate
“Warranty and Service Booklet”.

Other models
Some items of your vehicle are required to
be serviced at scheduled intervals. For
details about your maintenance schedule,
read the separate “Warranty and Main-
tenance Booklet”.

NOTE

You can set a reminder to be displayed
when a scheduled maintenance item is
almost due. For details, refer to “Main-
tenance settings” F3-58.

Maintenance precautions

When maintenance and service are re-
quired, it is recommended that all work be
done by an authorized SUBARU dealer.

If you perform maintenance and service by
yourself, you should familiarize yourself
with the information provided in this sec-
tion on general maintenance and service
for your SUBARU.

Incorrect or incomplete service could
cause improper or unsafe vehicle opera-
tion. Any problems caused by improper
maintenance and service performed by
you are not eligible for warranty coverage.

WARNING

Testing of an All-Wheel Drive

model must NEVER be performed
on a single two-wheel dynam-
ometer or similar apparatus. At-
tempting to do so will result in
transmission damage and in un-
controlled vehicle movement and
may cause an accident or injuries
to persons nearby.

Always select a safe area when

performing maintenance on your
vehicle.

Always be very careful to avoid

injury when working on the vehi-
cle. Remember that some of the
materials in the vehicle may be
hazardous if improperly used or
handled, for example, battery
acid.

Your vehicle should only be ser-

viced by persons fully competent
to do so. Serious personal injury
may result to persons not experi-
enced in servicing vehicles.

Always use the proper tools and

make certain that they are well
maintained.

Never get under the vehicle sup-

ported only by a jack. Always use
safety stands to support the
vehicle.

Never keep the engine running in

a poorly ventilated area, such as
a garage or other closed areas.

Do not smoke or allow open

flames around the fuel or battery.
This will cause a fire.

Because the fuel system is under

pressure, replacement of the fuel
filter should be performed only
by your SUBARU dealer.

Wear adequate eye protection to

guard against getting oil or fluids

– CONTINUED –

Maintenance and service/Maintenance schedule

11-3

(396,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

in your eyes. If something does
get in your eyes, thoroughly
wash them out with clean water.

Do not tamper with the wiring of

the SRS airbag system or seat-
belt pretensioner system, or at-
tempt to take its connectors
apart, as that may activate the
system or it can render it inop-
erative. NEVER use a circuit tes-
ter for this wiring. If your SRS
airbag or seatbelt pretensioner
needs service, consult your near-
est SUBARU dealer.

NOTE

SUBARU does not endorse the use of
non-SUBARU approved flushing sys-
tems and strongly advises against
performing these services on a
SUBARU vehicle. Non-SUBARU ap-
proved flushing systems use chemi-
cals and/or solvents which have not
been tested or approved by SUBARU.
SUBARU warranties do not cover any
part of the vehicle which is damaged by
adding or applying chemicals and/or
solvents other than those approved or
recommended by SUBARU.

Before checking or servicing
in the engine compartment

WARNING

Always stop the engine and apply

the parking brake to prevent the
vehicle from moving.

Always let the engine cool down.

Engine parts become very hot
when the engine is running and
remain hot for some time after the
engine has stopped.

Do not spill engine oil, engine

coolant, brake fluid or any other
fluid on hot engine components.
This may cause a fire.

When the ignition switch is in the

“ON” position, the cooling fan
may operate suddenly even when
the engine is stopped. If your
body or clothes come into con-
tact with a rotating fan, that could
result in serious injury. To avoid
risk of injury, perform the follow-
ing precautions.

– Models with push-button start

system:
Always turn the push-button
ignition switch to the “OFF”
position and confirm that the

operation indicator on the
switch is turned off. Then take
the access key fob out from
the vehicle.

– Models without push-button

start system:
Always remove the key from
the ignition switch.

Before performing any servicing

on a vehicle equipped with a
remote engine start system (a
dealer option) temporarily place
that system in the service mode
to prevent it from unexpectedly
starting the engine.

Maintenance and service/Maintenance precautions

11-4

(397,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

When checking or servicing
in the engine compartment

CAUTION

Do not contact the drive belt

cover while checking the compo-
nents in the engine compartment.
Doing so may cause your hand to
slip off the cover and result in an
unexpected injury.

Do not touch the oil filter until the

engine has cooled down comple-
tely. Doing so may result in a burn
or other injury. Note that the oil
filter becomes very hot when the
engine is running and remains
hot for some time after the engine
has stopped.

Do not apply force on the fender

insulator by placing your hands

on it, etc. Deformation of the
insulator and its mount may oc-
cur.

When checking or servicing
in the engine compartment
while the engine is running

WARNING

A running engine can be dangerous.
Keep your fingers, hands, clothing,
hair and tools away from the cooling
fan, drive belt and any other moving
engine parts. Removing rings,
watches and ties is advisable.

Maintenance and service/Maintenance precautions

11-5

(398,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Maintenance tips

Some clips and fender linings must be
removed before replacing the air cleaner
elements or specific bulbs.

Removing and reinstalling
clips

Removing clips

There are several types of clips used for
your vehicle.

Type A clips

1. Turn the clips counterclockwise using
a flat-head screwdriver until the center
portion of the clip is raised.
2. Remove the clips with a flat-head
screwdriver using leverage.

3. Remove the entire clip by pulling it up.

Type B clips

Type C clips

1. Pull out the center portion of the clip
using a flat-head screwdriver as shown in
the illustration.
2. Pull the protruded center portion to
remove the entire body of the clip.

Maintenance and service/Maintenance tips

11-6

(399,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Type D clips

1. Turn the clip counterclockwise using a
Phillips screwdriver until the center portion
of the clip is raised.
2. Remove the entire clip by pulling it up.

Type E clips

1. Push the center portion of the clip
using a Phillips screwdriver until the clip is
raised.
2. Remove the entire clip by pulling it up.

Type F clips

1. Pull out the head of the clip using a flat-
head screwdriver as shown in the illustra-
tion.
2. Remove the entire clip by pulling it up.

– CONTINUED –

Maintenance and service/Maintenance tips

11-7

(400,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Reinstalling clips

Type A clips

Type B clips

Type C clips

Type D clips

Type E clips

Insert the clip without the center portion
first and then push the center portion of the
clip into the hole.

Maintenance and service/Maintenance tips

11-8

(401,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Type F clips

Insert the clip without the head first and
then push the head of the clip into the hole.

Engine hood

To open the hood:
1. If the wiper blades are lifted off the
windshield, return them to their original
position.

2. Pull the hood lock release knob under
the instrument panel.

3. Release the secondary hood release
by moving the lever between the front grille
and the hood toward the left.
4. Lift up the hood.

To close the hood:
1. Lower the hood to a height of approxi-
mately 11.8 in (30 cm) above its closed
position and then let it drop.
2. After closing the hood, be sure the
hood is securely locked.

If this does not close the hood, release it
from a slightly higher position. Do not push
the hood forcibly to close it. It could deform
the metal.

– CONTINUED –

Maintenance and service/Engine hood

11-9

(402,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

WARNING

Always check that the hood is
properly locked before you start
driving. If it is not, it might fly open
while the vehicle is moving and
block your view, which may cause
an accident and serious bodily in-
jury.

CAUTION

When you open the engine hood,

do not stand the wiper blades up.
Furthermore, while the hood is
open, do not operate the wind-
shield wipers. Doing so could
result in damage to the engine
hood and wiper blades.

Be extremely careful not to catch

fingers or other objects when
closing the engine hood.

Do not push the hood forcibly to

close it. It could deform the metal.

Be extremely careful opening the

engine hood when the wind is
strong. The engine hood could
close suddenly, possibly causing
injuries from slamming.

Do not install accessories other

than genuine SUBARU parts to
the engine hood. If the engine
hood becomes too heavy, the
stay may not be able to support
holding it open.

Maintenance and service/Engine hood

11-10

(403,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Engine compartment overview

STI

Power steering fluid reservoir
(page 11-22)

Brake fluid reservoir/Clutch fluid reservoir
(page 11-23)

Fuse box (page 11-43)

Battery (page 11-42)

Windshield washer tank (page 11-38)

Engine oil filler cap (page 11-13)

Engine coolant reservoir (page 11-17)

Engine oil level gauge (page 11-13)

Coolant filler tank cap (page 11-17)

10) Air cleaner case (page 11-18)

– CONTINUED –

Maintenance and service/Engine compartment overview

11-11

(404,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Except STI

Brake fluid reservoir/Clutch fluid reservoir
(MT models) (page 11-23)

Fuse box (page 11-43)

Battery (page 11-42)

Windshield washer tank (page 11-38)

Engine oil filler cap (page 11-13)

Engine coolant reservoir (page 11-17)

Radiator cap (page 11-17)

Engine oil filter (page 11-15)

Engine oil level gauge (page 11-13)

10) Air cleaner case (page 11-18)

Maintenance and service/Engine compartment overview

11-12

(405,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Engine oil

CAUTION

If the level gauge is not pulled out

easily, twist the level gauge right
and left, then pull it out. Other-
wise, you may be injured acci-
dentally straining yourself.

Use only engine oil with the

recommended grade and vis-
cosity.

Be careful not to spill engine oil

when adding it. If oil touches the
exhaust pipe, it may cause a bad
smell, smoke, and/or a fire. If
engine oil gets on the exhaust
pipe, be sure to wipe it off.

Engine oil consumption

Some engine oil will be consumed while
driving. The rate of consumption can be
affected by such factors as transmission
type, driving style, terrain and tempera-
ture. Under the following conditions, oil
consumption can be increased and thus
require refilling between maintenance in-
tervals:
.

When the engine is new and within the

break-in period

When the engine oil is of lower quality

When the incorrect oil viscosity is used

When engine braking is employed

(repeatedly)
.

When the engine is operated at high

engine speeds (for extended periods of
time)
.

When the engine is operated under

heavy loads (for extended periods of time)
.

When the engine idles for extended

periods of time
.

When the vehicle is operated in stop

and go and/or heavy traffic situations
.

When the vehicle is used under severe

thermal conditions
.

When the vehicle accelerates and

decelerates frequently

Under these or similar conditions, you
should check your oil at least every 2nd
fuel fill-up and change your engine oil more
frequently. Different drivers in the same
car may experience different results. If
your oil consumption rate is greater than
expected, contact your authorized
SUBARU retailer who may perform a test
under controlled conditions.

Checking the oil level

1. Park the vehicle on a level surface and
stop the engine. If you check the oil level
just after stopping the engine, wait a few
minutes for the oil to drain back into the oil
pan before checking the level.

STI
1)

Oil level gauge

Oil filler cap

– CONTINUED –

Maintenance and service/Engine oil

11-13

(406,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Except STI
1)

Oil level gauge

Oil filler cap

Oil filter

CAUTION

If the level gauge is not pulled out
easily, twist the level gauge right and
left, then pull it out. Otherwise, you
may be injured accidentally strain-
ing yourself.

2. Pull out the level gauge, wipe it clean,
and insert it again.
3. Be sure the level gauge is correctly
inserted until it stops.

STI
1)

Notch

Full level

Low level

Approximately 1.1 US qt (1.0 liter, 0.9 Imp
qt) from low level to full level

Except STI
1)

Full level

Low level

Approximately 1.1 US qt (1.0 liter, 0.9 Imp
qt) from low level to full level

4. Pull out the oil level gauge again.
5. STI:
Check the oil level on the gauge. If the oil
level is below the low level mark, add oil so
that the full level is reached.
Except STI:
Check the oil levels on both sides of the
level gauge. Judge the engine oil level by
the lowest of the two levels. If the oil level is
below the low level mark, add oil so that
the full level is reached.

Maintenance and service/Engine oil

11-14

(407,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

CAUTION

For models except STI, be careful

not to touch the engine oil filter
when removing the oil filler cap.
Doing so may result in a burn, a
pinched finger, or may cause
some other injury.

Use only engine oil with the

recommended grade and vis-
cosity.

Be careful not to spill engine oil

when adding it. If oil touches the
exhaust pipe, it may cause a bad
smell, smoke, and/or a fire. If
engine oil gets on the exhaust
pipe, be sure to wipe it off.

To add engine oil, remove the engine oil
filler cap and slowly pour engine oil
through the filler neck. After pouring oil
into the engine, you must use the level
gauge to confirm that the oil level is
correct.
For models STI, just after driving or while
the engine is warm, the engine oil level
reading may be in a range between the
upper level and the notch mark. This is
caused by thermal expansion of the
engine oil.

NOTE

To prevent overfilling the engine oil, do
not add any additional oil above the
upper level when the engine is cold.

Changing the oil and oil filter

Change the oil and oil filter according to
the maintenance schedule in the “War-
ranty and Maintenance Booklet”.
The engine oil and oil filter must be
changed more frequently than listed in
the maintenance schedule when driving
on dusty roads, when short trips are
frequently made, or when driving in ex-
tremely cold weather.

NOTE

Changing the engine oil and oil filter

should be performed by a well-trained
expert. Contact your SUBARU dealer
for changing the engine oil and oil filter.
Fully trained mechanics are on standby
at a SUBARU dealer to utilize the
special tools, spare parts and recom-
mended oil for this work, and also, used
oils are properly disposed of.
.

If performing oil replacement your-

self, observe the local regulations and
dispose of waste oil properly.

Recommended grade and
viscosity

CAUTION

Use only engine oil with the recom-
mended grade and viscosity.

Refer to “Engine oil” F12-4.

NOTE

Engine oil viscosity (thickness) affects
fuel economy. Oils of lower viscosity
provide better fuel economy. However,
in hot weather, oil of higher viscosity is
required to properly lubricate the en-
gine.

– CONTINUED –

Maintenance and service/Engine oil

11-15

(408,1)

北米Model "A1720BE-A" EDITED: 2018/ 3/ 9

Synthetic oil

You must follow the oil and filter changing
intervals shown in the Warranty and
Maintenance booklet.

NOTE

Synthetic oil of the grade and viscosity
noted in chapter 12 is the recom-
mended engine oil for optimum engine
performance. Conventional oil may be
used if synthetic oil is unavailable.

Cooling system

WARNING

Never attempt to remove the

radiator cap until the engine has
been shut off and has cooled
down completely. Since the cool-
ant is under pressure, you may
suffer serious burns from a spray
of boiling hot coolant when the
cap is removed.

Be careful of the rotating cooling

fan when the engine hood is
open. When the engine tempera-
ture is high, the cooling fan in the
engine compartment may oper-
ate when the ignition switch is in
the “ON” position, even if the
engine is stopped. Touching the
cooling fan while it is rotating
may result in injury.

CAUTION

Vehicles are filled at the factory

with SUBARU Super Coolant that
does not require the first change
for 11 years/137,500 miles (11
years/220,000 km). Do not mix
this coolant with any other brand

or type of coolant during this
period. Mixing with a different
coolant will reduce the life of the
coolant. Should it be necessary
to top up the coolant for any
reason, use only SUBARU Super
Coolant.

If the SUBARU Super Coolant is
diluted with another brand or
type, the maintenance interval is
shortened to that of the mixing
coolant.

Do not splash the engine coolant

over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface.

Maintenance and service/Cooling system

11-16

Content .. 22 23 24 25 ..