service indicator SUBARU BRZ 2023 Owners Manual

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Page 9 of 432

SUBARU BRZ 2023 Owners Manual How to Use This Owner’s Manual
3
Introduction
– CONTINUED –
Chapter 3: Instruments and Controls
This chapter informs you about the opera-
tion of instrument panel indicators and
how to use the

How to Use This Owner’s Manual
3
Introduction
– CONTINUED –
Chapter 3: Instruments and Controls
This chapter informs you about the opera-
tion of instrument panel indicators and
how to use the instruments and other
switches.
Chapter 4: Climate Control
This chapter informs you how to operate
the climate control.
Chapter 5: Audio
This chapter informs you about your audio
system.
Chapter 6: Interior Equipment
This chapter informs you how to operate
interior equipment.
Chapter 7: Starting and Operating
This chapter informs you how to start and
operate your SUBARU.
Chapter 8: Driving Tips
This chapter informs you how to drive your
SUBARU in various conditions and
explains some safety tips on driving.
Chapter 9: In case of Emergency
This chapter informs you what to do if you
have a problem, such as a flat tire or
engine overheating.
Chapter 10: Appearance Care
This chapter informs you how to keep your
SUBARU looking good.
Chapter 11: Maintenance and Service This chapter informs you when you need

to take your SUBARU to the dealer for
scheduled maintenance and informs you
how to keep your SUBARU running prop-
erly.
Chapter 12: Specifications
This chapter informs you about the dimen-
sions and capacities of your SUBARU.
Chapter 13: Consumer Information and
Reporting Safety Defects
This chapter informs you about Tire infor-
mation, Uniform tire quality grading stan-
dards and Reporting safety defects.
Chapter 14: Index
This is an alphabetical listing of all that’s in
this manual. You can use it to quickly find
something you want to read.
For EyeSight system:
For details about the EyeSight system,
refer to the Owner’s Manual supplement
for the EyeSight system.
Depending on specifications, the vehicle
shown in the illustrations may differ from
your vehicle in terms of equipment.
■ Safety WarningsYou will find a number of WARNINGs,
CAUTIONs and NOTEs in this manual.
These safety warnings alert you to poten-
tial hazards that could result in injury to
you or others.
Please read these safety warnings as well
as all other portions of this manual care-
fully in order to gain a better under-
standing of how to use your SUBARU
vehicle safely.NOTEA NOTE gives information or sugges-
tions how to make better use of your
vehicle.
WARNING
A WARNING indicates a situation in
which serious injury or death could
result if the warning is ignored.
CAUTION
A CAUTION indicates a situation in
which injury or damage to your
vehicle, or both, could result if the
caution is ignored.
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SUBARU BRZ 2023 Owners Manual SRS Airbag (Supplemental Restraint System Airbag)
88
- Right-hand side
- Left-hand side
 Airbag control module (including
impact sensor and rollover sensor)
 Frontal airbag module
- Driver’s

SRS Airbag (Supplemental Restraint System Airbag)
88
- Right-hand side
- Left-hand side
 Airbag control module (including
impact sensor and rollover sensor)
 Frontal airbag module
- Driver’s side
- Front passenger’s side
 Knee airbag module
- Driver’s side
 Side impact sensor
- Center pillar left-hand side
- Center pillar right-hand side
- Forward of rear wheel house left-
hand side
- Forward of rear wheel house right-
hand side
- Door left-hand side
- Door right-hand side
 Side airbag module
- Driver’s side
- Front passenger’s side
 Curtain airbag module
- Right-hand side
- Left-hand side
 Front seatbelt pretensioner and adap-
tive force limiter
- Front passenger's side
 Front seatbelt pretensioner
- Driver's side
 Seatbelt buckle switch
- Front passenger’s side 
Front passenger’s occupant detection
sensor
 Front passenger’s frontal airbag ON
and OFF indicator
 All related wiring
■ SRS Airbag System
Servicing
WARNING
If the warning light exhibits any of
the following conditions, immedi-
ately stop the vehicle in a safe
place, and consult a SUBARU
dealer. Unless a technician checks
and repairs the system as needed,
the seatbelt pretensioners and/or
the SRS airbag will not operate
properly in the event of a collision,
which may result in injury. Flashing or flickering of the
warning light No illumination of the warning
light when the ignition switch is
first turned to the “ON” position Continuous illumination of the
warning light Illumination of the warning light
while driving
WARNING
 When discarding an airbag
module or scrapping the entire
vehicle damaged by a collision,
consult your SUBARU dealer. The SRS airbag has no user-
serviceable parts. Do not use
electrical test equipment on any
circuit related to the SRS airbag
system. For required servicing of
the SRS airbag, consult your
nearest SUBARU dealer.
Tampering with or disconnecting
the system’s wiring could result
in accidental inflation of the SRS
airbag or could make the system
inoperative, which may result in
serious injury.
CAUTION
If you need service or repair in
areas indicated in the following list,
have the work performed by an
authorized SUBARU dealer. The
SRS airbag control module, impact
sensors and airbag modules are
stored in these areas.
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SUBARU BRZ 2023 Owners Manual Fuel
223
Starting and Operating7
– CONTINUED –
7-1. Fuel■Fuel RequirementsThe engine is designed to operate using
unleaded gasoline with an octane rating
of 93 AKI (98 RON) or higher .
If

Fuel
223
Starting and Operating7
– CONTINUED –
7-1. Fuel■Fuel RequirementsThe engine is designed to operate using
unleaded gasoline with an octane rating
of 93 AKI (98 RON) or higher .
If unleaded gasoline with an octane
rating of 93 AKI (98 RON) is not available,
unleaded gasoline with an octane rating of
91 AKI (95 RON) may be used with no
detriment to engine durability or
driveability.
However, you may notice a slight
decrease in maximum engine perfor-
mance and you may hear some knocking
(pinging) from the engine while using 91
AKI (95 RON) fuel. Use of 91 AKI (95 RON)
fuel will not affect your warranty
coverage.
▼ Fuel octane rating
Using a gasoline with a lower octane
rating can cause persistent and heavy
knocking, which can damage the engine.
Do not be concerned if your vehicle some-
times knocks lightly when you drive up a
hill or when you accelerate. See your
dealer or a qualified service technician if
you use a fuel with the specified octane
rating and your vehi cle knocks heavily or
persistently.
▽RON
This octane rating is the Research Octane
Number.
▽AKI
This octane rating is the average of the
Research Octane and Motor Octane
numbers and is commonly referred to as
the Anti Knock Index (AKI).
▼ Unleaded gasoline
The neck of the fuel filler pipe is designed
to accept only an unleaded gasoline filler
nozzle. Under no circumstances should
leaded gasoline be used because it will
damage the emission control system and
may impair driveability and fuel economy. ▼
Reformulated gasoline
SUBARU supports the use of reformu-
lated gasoline when available. Reformu-
lated gasoline has been blended to burn
more cleanly and reduce vehicle emis-
sions.
▼ MMT
Some gasoline contains an octane-
enhancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl). If
you use such fuels, your emission control
system performance may deteriorate and
the CHECK ENGINE warning light/
malfunction indicator light may turn on. If
this happens, return to your authorized
SUBARU Dealer for service. If it is deter-
mined that the condition is caused by the
type of fuel used, repairs may not be
covered by your warranty.
▼ Gasoline for cleaner air
Your use of gasoline with detergent addi-
tives will help prevent deposits from
forming in your engi ne and fuel system.
This helps keep your engine in tune and
your emission cont rol system working
properly, and is a way of doing your part
for cleaner air. If you continuously use a
high quality fuel with the proper detergent
and other additives, you should never
CAUTION
Use of a fuel which is low in
quality or use of an inappropriate
fuel additive may cause damage
to the engine and/or fuel system. Some gas stations, particularly
those in high altitude areas, offer
fuels posted as regular octane
gasoline with an octane rating
below 93 AKI (98 RON). Use of
those fuels are not recom-
mended.
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SUBARU BRZ 2023 Owners Manual Preparing to Drive
228have implemented emission inspection of
the OBDII system.
 The inspection of the OBDII system
consists of a visual operational check of
the “ CHECK ENGINE ” warning l

Preparing to Drive
228have implemented emission inspection of
the OBDII system.
 The inspection of the OBDII system
consists of a visual operational check of
the “ CHECK ENGINE ” warning light/
malfunction indicator light (MIL) and an
examination of the OBDII system with an
electronic scan tool.
 A vehicle passes
the OBDII system
inspection if proper operation of the
“ CHECK ENGINE ” warning light is
observed, there are no stored diagnostic
trouble codes, and the OBDII readiness
monitors are all complete.
 A vehicle fails
the OBDII inspection if
the “ CHECK ENGINE ” warning light is not
properly operating (light is illuminated or is
not working due to a burned out bulb) or
there is one or more diagnostic trouble
codes stored in the vehicle’s computer.
 A state emission in spection may reject
(not pass or fail) a vehicle if the number of
OBDII system readiness monitors “ NOT
READY ” is greater than one. If the
vehicle’s battery has been recently
replaced or disconnected, the OBDII
system inspection may indicate that the
vehicle is not ready for the emission test.
Under this condition, the vehicle driver
should be instructed to drive his/her
vehicle for a few days to reset the readi-
ness monitors and return for an emission
re-inspection. 
Owners of rejected or failing vehicles
should contact their SUBARU Dealer for
service.
7-3. Preparing to DriveYou should perform the following checks
and adjustments every day before you
start driving.
1. Check that all windows, mirrors, and
lights are clean and unobstructed.
2. Check the appearance and condition
of the tires. Also check tires for proper
inflation.
3. Look under the vehicle for any sign of
leaks.
4. Check that no small animals enter the
engine compartment.
5. Check that the hood and trunk are fully
closed.
6. Check the adjustment of the seat.
7. Check the adjustment of the inside
and outside mirrors.
8. Fasten your seatbelt. Check that your
passengers have fastened their seatbelts.
9. Check the operation of the warning
and indicator lights when the ignition
switch is turned to the “ON” position.
10. Check the gauges, indicator and
warning lights after starting the engine.
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SUBARU BRZ 2023 Owners Manual Maintenance and Service11
Maintenance and Service
11-1. Maintenance Schedule .....................................339
11-2. Maintenance Precautions.................................339
Before Checking

Maintenance and Service11
Maintenance and Service
11-1. Maintenance Schedule .....................................339
11-2. Maintenance Precautions.................................339
Before Checking or Servicing in the Engine
Compartment ..............................................................340
When Checking or Servicing in the Engine Compartment ..............................................................340
When Checking or Servicing in the Engine Compartment While the Engine Is Running ............341
11-3. Maintenance Tips ..............................................341
Removing and Reinstalling Clips................................341
11-4. Engine Hood ......................................................343
11-5. Engine Compartment Overview.......................345
11-6. Engine Oil ..........................................................346
Engine Oil Consumption..............................................346
Checking the Oil Level .................................................346
Changing the Oil and Oil Filter ....................................347
Recommended Grade and Viscosity ..........................347
Synthetic Oil..................................................................348
11-7. Cooling System .................................................348
Cooling Fan, Hose and Connections ..........................348
Engine Coolant .............................................................349
11-8. Air Cleaner Element ..........................................350
Replacing the Air Cleaner Element .............................350
11-9. Spark Plugs .......................................................352
Recommended Spark Plugs ........................................352
11-10. Drive Belt .........................................................352
11-11. Automatic Transmission Fluid ......................352
Recommended Grade and Viscosity ..........................352
11-12. Differential Gear Oil ........................................353
Recommended Grade and Viscosity ..........................353
11-13. Manual Transmission Oil ...............................353
Recommended Grade and Viscosity ..........................353
11-14. Brake Fluid ......................................................353
Checking the Fluid Level ............................................ 353
Recommended Brake Fluid ........................................ 354
11-15. Clutch Fluid (MT models) ...............................354
Checking the Fluid Level ............................................ 354
Recommended Clutch Fluid ....................................... 355
11-16. Brake Booster .................................................355
11-17. Brake Pedal .....................................................356
11-18. Clutch Pedal (MT models) ..............................356
11-19. Replacement of Brake Pad and Lining..........356
Breaking-in of New Brake Pads and Linings ............ 357
11-20. Parking Brake Stroke ......................................357
11-21. Tires and Wheels ............................................358
Types of Tires .............................................................. 358
Tire Pressure Monito ring System (TPMS) 
(If Equipped)............................................................... 358
Tire Inspection ............................................................. 360
Tire Pressures and Wear............................................. 361
Wheel Balance ............................................................. 363
Wear Indicators ............................................................ 363
Rotational Direction of Tires....................................... 364
Tire Rotation................................................................. 364
Tire Replacement ...... ............................. ...................... 365
Wheel Replacement ..................................................... 365
11-22. Alloy Wheels ....................................................366
11-23. Windshield Washer Fluid ...............................366
11-24. Replacement of Wiper Blades........................367
Windshield Wiper Blade Assembly ............................ 368
Windshield Wiper Blade Rubber ................................ 369
11-25. Battery ..............................................................370
11-26. Fuses ................................................................371
11-27. Installation of Acce ssories ............................373
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SUBARU BRZ 2023 Owners Manual Maintenance Precautions
340NOTESUBARU does not endorse the use of
non-SUBARU approved flushing sys-
tems and strongly advises against per-
forming these services on a SUBARU
vehicle. Non-SUBARU ap

Maintenance Precautions
340NOTESUBARU does not endorse the use of
non-SUBARU approved flushing sys-
tems and strongly advises against per-
forming these services on a SUBARU
vehicle. Non-SUBARU approved flush-
ing systems use chemicals and/or sol-
vents which have not been tested or
approved by SUBARU. SUBARU war-
ranties do not cover any part of the
vehicle which is damaged by adding or
applying chemicals and/or solvents
other than those approved or recom-
mended by SUBARU.
■ Before Checking or
Servicing in the Engine
Compartment
■When Checking or Servicing
in the Engine Compartment
Do not tamper wi th the wiring of
the SRS airbag system or seatbelt
pretensioner system, or attempt
to take its connectors apart, as
that may activate the system or it
can render it inoperative. NEVER
use a circuit tester for these
wiring. If your SRS airbag or
seatbelt pretensioner needs
service, consult your nearest
SUBARU dealer. Check the inside of the engine
compartment to see if there are
any cloths and tools left. If they
are left inside, they may be a
cause of malfunction and fire.
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 is 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
contact with a rotating fan, that
could result in serious injury. To
avoid risk of injury, always turn
the push-button i gnition switch to
the “OFF” position and confirm
that the operation indicator on
the switch is turn ed off. Then take
the access key fob out from the
vehicle.
 Before performing any servicing
on a vehicle equipped with a
remote engine start system
temporarily place that system in
the service mode to prevent it
from unexpectedly starting the
engine.
B02092
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Page 363 of 432

SUBARU BRZ 2023 Owners Manual Parking Brake Stroke
357
Maintenance and Service11
The disc brakes have audible wear indica-
tors on the brake pads. If the brake pads
wear close to their service limit, the wear
indicator makes a

Page 369 of 432

SUBARU BRZ 2023 Owners Manual Tires and Wheels
363
Maintenance and Service11
– CONTINUED –
■Wheel BalanceEach wheel was correctly balanced
when your vehicle was new, but the
wheels will become unbalanced as
the tires b