SUBARU BRZ 2023 Owners Manual

Tires and Wheels
365
Maintenance and Service11
– CONTINUED –
After driving approximately 600
miles (1,000 km), check the wheel
nuts again and retighten any nut
that has become loose.■ Tire ReplacementThe 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 opti-
mally matched to the characteristics of the
vehicle and were sele cted to give the best
possible combination of running perfor-
mance, ride comfort, and service life. It is
essential for every tire to have a size and
construction matching those shown on the
tire inflation pressure label and to have a
speed symbol and load index matching
those shown on the tire inflation pressure
label.
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),
construction, 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.
■ Wheel ReplacementWhen 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
 When replacing or installing
tire(s), all four tires must be the
same for the following items.
(a) Size(b) Speed symbol(c) Load index(d) Circumference(e) Construction(f) Manufacturer(g) Brand (tread pattern)(h) Degrees of wearFor items (a) to (c), you must
obey the specification that is
printed on the tire inflation pres-
sure label. The tire inflation pres-
sure label is located on the
driver’s center pillar.
If all four tires are not the same in
items (a) to (h), serious mechani-
cal damage could be caused to
the drivetrain of the car, and
affect the followings.-Ride-Handling-Braking- Speedometer/Odometer cali- bration- Clearance between the body
and the tires
It also may be dangerous and
lead to loss of vehicle control,
and it can lead to an accident.
 Use only radial tires. Do not use
radial tires together with belted
bias tires and/or bias-ply tires.
Doing so can dangerously reduce
controllability, resulting in an
accident.
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Alloy Wheels
366NOTEWhen 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 loos e, tighten it to the
specified torque.
11-22. Alloy WheelsAlloy wheels can be scratched and
damaged easily. Handle them carefully to
maintain their appearance, performance,
and safety.
 When any of the wheels is removed
and replaced for tire rotation or to change
a flat, 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.
 When wheel nuts, balance weights, or
the center cap is replaced, be sure to
replace them with genuine SUBARU parts
designed for alloy wheels.
11-23. Windshield Washer Fluid1) “LOW” positionThe washer fluid level can be checked by
observing the position of the level on the
liquid-covered holes in the gauge. 
If the level falls below the second hole
from the bottom (the “LOW” position), add
washer fluid.
Use windshield washer fluid. If windshield
washer fluid is unavailable use clean
water.
In areas where water freezes in winter,
use an anti-freeze type windshield washer
fluid.
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
during turns. The resulting loss of
vehicle control could lead to an
accident.
1B02110
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Replacement of Wiper Blades
367
Maintenance and Service11
– CONTINUED –
If you fill the windshield washer tank with
a fluid with a different concentration from
the one used previously, purge the old
fluid from the piping between the wind-
shield washer tank and washer nozzles by
operating the washer for a certain period
of time. Otherwise, if the concentration of
the fluid remaining in the piping is too low
for the outside temperature, it may freeze
and block the nozzles.
11-24. Replacement of Wiper BladesGrease, wax, insects, or other material on
the windshield or the wiper blade results in
jerky wiper operation and streaking on the
glass. If you cannot remove the streaks
after operating the windshield washer or if
the wiper operation is jerky, clean the
outer surface of the windshield using a
sponge or soft cloth with a neutral deter-
gent or mild-abrasive cleaner. Do not,
however, use detergent to clean the blade
rubbers. Use only a sponge or soft cloth
(and no neutral deterge nt or mild abrasive
cleaner) when you clean the blade
rubbers. If you wipe the rubber of the
blade strongly, the black coating compo-
nent will peel off, which will cause the
wiper to judder. Also, after wiping it off,
check that the rubber has not come loose.
After cleaning the window glass and wiper
blade rubbers, be sure to rinse them with
clean water. Rinse the window until the
water does not form beads on the glass.
This indicates that the glass is clean.
CAUTION
Never use engine coolant as washer
fluid because it could cause paint
damage.
CAUTION
 Adjust the washer fluid concen-
tration appropriately for the
outside temperature. If the
concentration is inappropriate,
sprayed washer fluid may freeze
on the windshield and obstruct
your view, and the fluid may
freeze in the windshield washer
tank. Be careful foreign matter does
not contaminate the washer fluid
when filling the tank. Contamina-
tion could cause malfunctions,
such as clogging the pump.
 State or local regulations on vola-
tile organic compounds may
restrict the use of methanol, a
common windshield washer anti-
freeze additive. Washer fluids
containing non-methanol anti-
freeze agents should be used
only if they provide cold weather
protection without damaging
your vehicle’s paint, wiper blades
or washer system.
CAUTION
 Do not clean the wiper blades
with gasoline or a solvent, such
as paint thinner or benzine. This
will cause deterioration of the
wiper blades.
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Replacement of Wiper Blades
368
If you cannot eliminate the streaking even
after following this method, replace the
wiper blades using the following proce-
dures.■ Windshield Wiper Blade
AssemblyNOTEDo not lower the wi per arm while the
wiper blade assembly is removed.
1. Raise the wiper arm off the windshield.
First raise the driver’s side wiper arm and
then raise the front passenger’s side wiper
arm.
1) Lock cover2. Hold the wiper blade connection by
hand, open the lock cover to release the
lock.
 When you wish to raise the
passenger-side wiper arm, first
raise the driver-side wiper arm.
Otherwise, the passenger-side
wiper assembly and driver-side
wiper assembly will touch each
other, possibly resulting in
scratches. Return the passenger-side wiper
arm to its original position before
returning the dr iver-side wiper
arm to its original position. Other-
wise, the passenger-side wiper
assembly and driver-side wiper
assembly will touch each other,
possibly resulting in scratches. When returning the raised wipers
to the original positions, return
the wipers slowly on the wind-
shield by hand. Returning the
wipers from the detached posi-
tions by the spring operation
might change the shape of the
wiper arm or scratch the wind-
shield. While removing the wiper blades
from the wiper arms, do not
return the wiper ar ms to the orig-
inal positions. Otherwise, the
windshield surface may be
scratched.
B01729
CAUTION
Hold the wiper arm when replacing
the wiper blade. Holding the wiper
blade, may result in blade deforma-
tion.
1
B02111
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Replacement of Wiper Blades
369
Maintenance and Service11
– CONTINUED –
3. Remove the wiper blade assembly by
holding its pivot area and pushing it in the
direction shown by the arrow.
4. When installing the wiper blade
assembly, align it with the wiper arm
connection part and then slide it in the
opposite direction of removal to install. After installing the wiper blade assembly,

close the lock cover and check that the
connection part is locked completely.
5. Hold the wiper arm by hand and slowly
lower it in position.
■ Windshield Wiper Blade
Rubber1) Support1. Grasp the locked end of the blade
rubber assembly and pull it firmly until the
stoppers on the rubber are free of the
support.
1) Metal spines2. If the new blade rubber is not provided
with two metal spines , remove the metal
spines from the old blade rubber and
install them in the new blade rubber.
B02112B02113
1
B02114
B00504
1
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Battery
3703. Align the claws of the support with the
grooves in the rubber and slide the blade
rubber assembly into the support until it
locks.1) Stopper
4. Be sure to position the claws at the
end of the support between the stoppers
on the rubber as shown. If the rubber is
not retained properly, the wiper blade may
scratch the windshield.
11-25. Battery
B02115
1
B02116
WARNING
 Before beginning work on or near
any battery, be sure to extinguish
all cigarettes, matches, and
lighters. Never expose a battery
to an open flame or electric
sparks. Batteries give off a gas
which is highly flammable and
explosive. For safety, in case an explosion
does occur, wear eye protection
or shield your eyes when working
near any battery. Never lean over
a battery. Do not let battery fluid contact
eyes, skin, fabrics, or paint
because battery fluid is a corro-
sive acid. If battery fluid gets on
your skin or in your eyes, immedi-
ately flush the area with water
thoroughly. Seek medical help
immediately if acid has entered
the eyes.
If battery fluid is accidentally
swallowed, immediately drink a
large amount of milk or water,
and seek medical attention
immediately.
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Fuses
371
Maintenance and Service11
– CONTINUED –
It is unnecessary to periodically check the
battery fluid level or periodically refill with
distilled water.
11-26. FusesNOTEFuse rating and using circuit are
described on the fuse box cover.
The fuses are designed to melt during an
overload to prevent damage to the wiring
harness and electrical equipment. The
fuses are located in two fuse boxes.
One is located under the instrument panel
behind the fuse box cover on the driver’s
seat side. To remove the cover, pull it out.
 To lessen the risk of sparks,
remove rings, metal watchbands,
and other metal jewelry. Never
allow metal tools to contact the
positive battery terminal and
anything connected to it WHILE
you are at the same time in
contact with any other metallic
portion of the vehicle because a
short circuit will result. Keep everyone including children
away from the battery. Charge the battery in a well-venti-
lated area.Battery posts, terminals, and
related accessories contain lead
and lead compounds, chemicals
known to the State of California to
cause cancer and reproductive
harm. Batteries also contain
other chemicals known to the
State of California to cause
cancer. Wash hands after
handling.
CAUTION
Never use more than 10 amperes
when charging the battery because
it will shorten battery life.
CAUTION
Never replace a fuse with one hav-
ing a higher rating or with material
other than a fuse because serious
damage or a fire could result.
B02117
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Fuses
3721) Fuse pullerThe other one (main fuse box) is housed
in the engine compartment. Also, the fuse
puller are stored in the fuse box.
Pinch the upper part of the fuse puller
when removing it from the main fuse box.
1) Good
2) BlownIf any lights, accessories or other elec-
trical controls do not operate, inspect the
corresponding fuse. If a fuse has blown,
replace it.
1. Turn the ignition switch to the “OFF”
position and turn off all electrical accesso-
ries.
2. Remove the fuse box cover.
3. Determine which fuse may be blown.
Look at the back side of each fuse box
cover. 4. Pull out the fuse with the fuse puller.
5. Inspect the fuse. If it has blown,

replace it with a spare fuse of the same
rating.
6. If the same fuse blows again, this indi-
cates that its system has a problem.
Contact your SUBARU dealer for repairs.
1B02118
B01008
12
B00975
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Installation of Accessories
373
Maintenance and Service11
– CONTINUED –
11-27. Installation of Acces-soriesAlways consult your SUBARU dealer
before installing fog lights or any other
electrical equipment in your vehicle. Such
accessories may cause the electronic
system to malfunction if they are incor-
rectly installed or if they are not suited for
the vehicle. We recommend that you
install only genuine SUBARU accessories
on your vehicle.
11-28. Replacing Bulbs
■ HeadlightsThe LED headlight warning light illumi-
nates if the LED headlights malfunction.
Have your vehicle inspected at a
SUBARU dealer as soon as possible.■ Backup LightNOTEIt may be difficult to replace the
bulbs. We recommend that you have
the bulbs replaced by your SUBARU
dealer if necessary.
 If a genuine SUBARU accessory has
been installed to the rear bumper,
check the manual included with the
accessory.
WARNING
Bulbs may become very hot while
illuminated. Before replacing bulbs,
turn off the lights and wait until the
bulbs cool down, Otherwise, there
is the risk of sustaining a burn
injury.
CAUTION
 Before replacing a backup light,
stop the engine and allow the
exhaust pipes and surrounding
parts to cool suffi ciently. As the
bulbs are near the exhaust pipes,
there is a risk of being burned. Replace any bulb only with a new
bulb of the specified wattage.
Using a bulb of different wattage
could result in a fire. For the spec-
ified wattage of each bulb, refer to
"Bulb Chart" P387. For replace-
ment, contact your SUBARU
dealer.
B02119
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Replacing Bulbs
3741. Remove the clips.
2. Remove the rear bumper cover.3. Turn the bulb socket counterclockwise

and remove it.
4. Pull the bulb out of the bulb socket and
replace it with a new one.
5. Install the bulb socket by turning it
clockwise.
6. Reconnect the electrical connector.
7. Reinstall the rear bumper cover.
■ Trunk Light
■Other BulbsIt may be difficult to replace the bulbs.
We recommend that you have the
bulbs replaced by your SUBARU dealer
if necessary.■ Adjusting Headlight Aim1) Adjustment bolt A
2) Adjustment bolt B▼ Before checking the headlight
aiming1. Make sure the vehicle has a full tank of
gasoline and the area around the head-
light is not deformed.
2. Park the vehicle on level ground.
3. Sit in the driver’s seat.
4. Bounce the vehicle several times.
B02120B02121
CAUTION
Replacing the bulb could cause
burns since the bulb may be very
hot. Have the bulb replaced by your
SUBARU dealer.
B02122
2
1
B02156
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