2023 SUBARU BRZ engine

Cooling System
349
Maintenance and Service11
– CONTINUED –
Check the fuse and replace it if necessary.
Refer to "Fuses" P371. If the fuse is not
blown, have the cooling system checked
by your SUBARU dealer.
If the frequent addition of coolant is neces-
sary between vehicle service visits, it is
recommended that you have your vehicle
inspected by an authorized SUBARU
dealer to check for leaks, damage, or
looseness.■ Engine Coolant▼ Checking the coolant level1) “FULL” level mark
2) “LOW” level mark
Check the coolant level at each fuel stop.
1. Check the coolant level on the outside
of the reservoir while the engine is cool.
2. If the level is close to or lower than the
“LOW” level mark, add coolant up to the
“FULL” level mark. If the reserve tank is
empty, remove the radiator cap and refill
coolant up to just below the filler neck as
shown in the following illustration.
1) Fill up to this level.
3. After refilling the reserve tank and the
radiator, reinstall t he cap and check that
the rubber gaskets in side the radiator cap
are in the proper position.
12B02100
1
B02101
CAUTION
 Be careful not to spill engine
coolant when adding it. If coolant
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or
a fire. If engine coolant gets on
the exhaust pipe, be sure to wipe
it off. Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface.
B00018
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Air Cleaner Element
350▼Changing the coolantIt may be difficult to change the coolant.
Have the coolant changed by your
SUBARU dealer if necessary.
The coolant should be changed according
to the maintenance schedule in the
“Warranty and Maintenance Booklet”.
11-8. Air Cleaner ElementThe air cleaner element functions as a
filter screen. When the element is perfo-
rated or removed, engine wear will be
excessive and engine life shortened.
The air cleaner element is a dry type. It is
unnecessary to clean or wash the
element.
■ Replacing the Air Cleaner
ElementReplace the air cleaner element according
to the maintenance schedule in the
“Warranty and Maintenance Booklet”.
Under extremely dusty conditions, replace
it more frequently. It is recommended that
you always use genuine SUBARU parts.
WARNING
Do not operate the engine with the
air cleaner element removed. The
air cleaner element not only filters
intake air but also stops flames if
the engine backfires. If the air
cleaner element is not installed
when the engine backfires, you
could be burned.
CAUTION
When replacing the air cleaner ele-
ment, use a genuine SUBARU air
cleaner element. If it is not used,
there is the possibility of causing a
negative effect to the engine.
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Spark Plugs
35211-9. Spark PlugsIt may be difficult to replace the spark
plugs. It is recommended that you have
the spark plugs replaced by your
SUBARU dealer.
The spark plugs should be replaced
according to the maintenance schedule in
the “Warranty and Maintenance Booklet”.■ Recommended Spark PlugsRefer to "Electrical System" P385.
11-10. Drive BeltIt is unnecessary to check the deflection of
the drive belt periodically because your
engine is equipped with an automatic belt
tension adjuster. However, replacement
of the belt should be done according to the
maintenance schedule in the “Warranty
and Maintenance Booklet”. Consult your
SUBARU dealer for replacement.
If the belt is loose, cracked or worn, we
recommend that contact your SUBARU
dealer.
11-11. Automatic Transmis -sion FluidIt is not necessary to check the transmis-
sion oil level. Check that there are no
cracks, damage or leakage. However,
have the oil inspected by your SUBARU
dealer according to the maintenance
schedule in the “Warranty and Mainte-
nance Booklet”. Consult your SUBARU
dealer for details.■ Recommended Grade and
ViscosityEach oil manufacturer has its own base
oils and additives. Never use different
brands together. For details, refer to
"Fluids" P383.
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Brake Booster
355
Maintenance and Service11
1) “MAX” level line2) “MIN” level line
Visually check the fluid level of the reser-
voir monthly on the even surface. Be sure
to check the clutch fluid level from the
outside of the reservoir. If the fluid level is
below “MIN”, top up clutch fluid to “MAX”.
Use only clutch fluid from a sealed
container.■ Recommended Clutch FluidRefer to "Fluids" P383.
11-16. Brake BoosterThe brake booster utilizes the vacuum
produced by the vacuum pump to reduce
the force required to depress the brake
pedal.
The vacuum in the brake booster may be
insufficient if the brake pedal is depressed
when the engine is stopped or after the
vehicle has been parked for a long period
of time. It such cases, it is necessary to
depress the brake pedal using greater
force than usual.
 Never splash the clutch fluid over
painted surfaces or rubber parts.
Alcohol containe d in the clutch
fluid may damage them. Be careful not to spill clutch fluid
when adding it. If clutch fluid
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or
a fire. If clutch fluid gets on the
exhaust pipe, be sure to wipe it
off. Check the fluid level for the clutch
system at the inboard side of the
reservoir. You cannot check the
fluid level at the outboard side of
the reservoir.
12
B02106
CAUTION
Never use different brands of clutch
fluid together. Also, avoid mixing
DOT 3 and DOT 4 brake fluids even
if they are the same brand.
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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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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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Specifications12
Specifications
12-1. Specifications....................................................380
Dimensions ...................................................................380
Engine............................................................................380
Fuel ................................................................................381
Engine Oil ......................................................................381
Manual Transmission and Differential Gear Oil.........383
Fluids .............................................................................383
Engine Coolant .............................................................384
Electrical System ..........................................................385
Tires ...............................................................................385
Brake Pedal .............. .......................................... ...........385
Brake Disc ................ .......................................... ...........386
Brake Pad ........... ................................................... ........386
12-2. Bulb Chart ..........................................................387
Safety Precautions ...................................................... 387
Bulb Chart .................................................................... 388
12-3. Vehicle Identification ........................................390
12-4. Function Settings ..............................................391
Function Settings and Adjustments on the Center
Information Display ................................................... 391
Individual Settings an d Adjustments Excluding 
Center Information Display and Combination 
Meter Display (Color TFT) ......................................... 391
Function Settings and Adjustments Performed 
by a Dealer ................................................................. 391
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