suspension MAZDA MODEL 3 HATCHBACK 2021 Owners Manual

Do not place any objects on the
assist grips. Only hang clothes
directly on the coat hooks.
Do not touch the components of the
supplemental restraint system after
the air bags have in flated:
Touching the components of the
supplemental restraint system after the
air bags have infl ated is dangerous.
Immediately after inflation, they are
very hot. You could get burned.
Never install any front-end equipment
to your vehicle:
Installation of front-end equipment,
such as frontal protection bar
(kangaroo bar, bull bar, push bar, or
other similar devices), snowplow, or
winches, is dangerous. The air bag
crash sensor system could be a ffected.
This could cause air bags to inflate
unexpectedly, or it could prevent the
air bags from inflating during an
accident. Front occupants could be
seriously injured.
Do not modify the suspension:
Modifying the vehi cle suspension is
dangerous. If the vehicle's height or
the suspension is modi fied, the vehicle
will be unable to accurately detect a
collision or roll-over accident resulting
in incorrect or unexpected air bag
deployment and the possibility of
serious injuries.To prevent false detection by the air
bag sensor system, heed the
following:
 Do not use tires or wheels other than
those speci fied for your Mazda:
Use of any tire or wheel other than
those specified for your Mazda (page
9-10) is dangerous. Use of such
wheels will prevent the vehicle's
accident detections system from
accurately detecting a collision or
roll-over accident resulting in
incorrect or unexpected air bag
deployment and the possibility of
serious injuries.
 Do not overload your vehicle:
Overloading your vehicle is
dangerous as it could prevent the air
bag crash sensor system from
accurately detecting a collision or
roll-over accident resulting in
incorrect or unexpected air bag
deployment and the possibility of
serious injuries. The gross axle
weight rating (GAWR) and the gross
vehicle weight rating (GVWR) for
your vehicle are on the Motor
Vehicle Safety Standard Label on the
driver's door frame. Do not exceed
these ratings.
 Do not drive the vehicle o ff-road:
Driving your Mazda off-road is
dangerous because the vehicle has
not been designed to do so. Driving
the vehicle o ff-road could prevent
the air bag crash sensor system from
accurately detecting a collision or
roll-over accident resulting in
incorrect or unexpected air bag
deployment and the possibility of
serious injuries.
Essential Safety Equipment
SRS Air Bags
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Driving on Uneven Road
▼Driving on Uneven Road
Your vehicle's suspension and
underbody can be damaged if driven
on rough/uneven roads or over speed
bumps at excessive speeds. Use care
and reduce speed when traveling on
rough/uneven roads or over speed
bumps.

Use care not to damage the vehicle's
underbody, bumpers or
muffler(s)
when driving under the following
conditions:
Ascending or descending a slope
with a sharp transition angle
Ascending or descending a driveway
or trailer ramp with a sharp transition
angle

This vehicle is equipped with low
pro file tires allowing class-leading
performance and handling. As a result,
the sidewall of the tires are very thin
and the tires and wheels can be
damaged if driven through potholes or
on rough/uneven roads at excessive
speeds. Use care and reduce speed
when traveling on rough/uneven roads
or through potholes.
Turbocharger Information
(SKYACTIV -G 2.5T)
▼ Turbocharger Information
(SKYACTIV
-G 2.5T)
CAUTION

After driving at freeway speeds or up
a long hill, idle the engine at least 30
seconds before stopping it.
Otherwise, the turbocharger could
be damaged.
 Racing or over-revving the engine,
particularly after it's just been
started, can damage the
turbocharger.
 To protect the engine from damage,
the engine is designed so that it
cannot be raced just after starting it
in extremely cold weather.
The turbocharger greatly enhances
engine power. Its advanced design
provides improved operation and
requires minimum maintenance.

To get the most from it, observe the
following.
1. Change engine oil and filter
according to Scheduled
Maintenance.
Refer to Scheduled Maintenance
(U.S.A. and Puerto Rico) on page
6-4.
Refer to Scheduled Maintenance
(Canada) on page 6-6.
Refer to Scheduled Maintenance
(Mexico) on page 6-9.
2. Use only recommended engine oil (page 6-17). Extra additives are
NOT recommended.
Before Driving
Driving Tips
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WARNING
Do not rely completely on the LDWS:
 The LDWS system is not designed to
compensate for a driver’s lack of
caution and relying too much on the
system could lead to an accident.
 The functions of the LDWS have
limitations. Always stay on course
using the steering wheel and drive
with care.
CAUTION
Heed the following cautions so that
the LDWS can operate normally.
Do not modify the vehicle's
suspensions.
 Always use tires of the speci fied type
and size for the front and rear
wheels. Consult an Authorized
Mazda Dealer for tire replacement.
NOTE
The system may not operate normally
under the following conditions.
The white (yellow) lane lines are less
visible because of dirt or paint
fl aking.
White (yellow) lane lines are less
visible because of bad weather (rain,
fog , or snow).
The vehicle is driven on a temporary
lane or section with a closed lane
resulting from construction where
there might be multiple white
(yellow) lane lines, or they are
interrupted.
The camera picks up an obscure line,
such as a temporary line being used
for construction, or because of
shade, unmelted snow, or grooves
filled with water.
The surrounding brightness suddenly
changes such as when entering or
exiting a tunnel.
Back-light is re flected off the road
surface.
The road surface is wet and shiny
after rain, or there are puddles on
the road.
The width of a lane is excessively
narrow.
The vehicle is driven on roads with
tight curves.
Heavy luggage is loaded in the
trunk/luggage compartment or on
the rear seat causing the vehicle to
tilt.
The vehicle is driven through a fork in
the road or a junction.
The shade of a guardrail parallel to a
white (yellow) lane line is cast on the
road.
The illumination of the headlights is
weakened because of dirt or the
optical axis is deviated at night.
The road is excessively uneven.The vehicle is shaken after hitting a
road bump.
A vehicle in front of your vehicle is
running near a white (yellow) lane
line making it less visible.
The windshield is dirty or foggy.Strong light is directed from the front
of the vehicle (such as sunlight, or
headlights (high-beam) of
on-coming vehicles).
The vehicle is driven through an
intersection or a roundabout.
When Driving
i-ACTIVSENSE
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The vehicle is driven on roads with
lane lines other than white (yellow)
lines, such as an expressway.

Do not get out of the vehicle while
the stop hold control is operating.
(Automatic transmission vehicle)
Getting out of the vehicle while the
stop hold control is operating is
dangerous as the vehicle may move
unexpectedly and result in an accident.
Before getting out of the vehicle,
switch the TJA o ff, apply the parking
brake, and then shift the selector lever
to the P position.

CAUTION
Turn the system off when the vehicle is
running on a chassis roller.
Heed the following cautions so that
the TJA can operate normally.
 Turn the system o ff when the vehicle
is running on a chassis roller.
 Do not modify the vehicle's
suspensions.
 Always use wheels of the speci fied
size for the front and rear wheels.
Consult an Authorized Mazda Dealer
for tire replacement.

NOTE
The headway control does not detect
the following as physical objects.
Vehicles approaching in the
opposite direction
Pe d e s t r i a n sStationary objects (stopped
vehicles, obstructions)
If a vehicle ahead is traveling at an
extremely low speed, the system may
not detect it correctly.
If there is a structure on the road or
an object (such as a monorail) at a
low height o ff the ground in front of
the vehicle, the system may operate.
Therefore, do not use the TJA.
Do not use the TJA under conditions
in which close proximity warnings
are frequently activated.
If it is necessary to accelerate for a
lane change or the vehicle ahead
brakes suddenly causing you to close
in on the vehicle rapidly, accelerate
using the accelerator pedal or
decelerate using the brake pedal
depending on the conditions.
While the TJA is in use, any intended
engine braking does not occur even
if you shift the shift lever (manual
transmission) or the selector lever
(automatic transmission). If
deceleration is required, lower the
vehicle speed setting or depress the
brake pedal.
While braking by the TJA control is
operating , you might hear an
operation sound, however, this does
not indicate a problem.
The brake lights turn on while
braking by the TJA control is
operating , however, they may not
turn on while the vehicle is on a
down slope at the set vehicle speed
or traveling at a constant speed and
following a vehicle ahead.
Under the following conditions, the
TJA may not be able to detect white
(yellow) lines or vehicles ahead
correctly and the TJA may not
operate normally.
The forward sensing camera (FSC)
cannot recognize the area in front
of the vehicle due to soiling or fog.
When Driving
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The functions of the LAS have
limitations. Always stay on course
using the steering wheel and drive
with care.
 Do not use the LAS under the
following circumstances, otherwise it
may result in an accident.
 The vehicle is driven on slippery
roads such as icy or snow-covered
roads, and unpaved roads.
 Tires of a
different
speci fied size
are used, such as a temporary
spare tire.
 Tires with
insufficient tread are
used.
 The tire pressures are not adjusted
to the
specified pressure.
 The vehicle is being used to tow a
camper or boat trailer.
 Tire chains are used.
 The vehicle is driven on roads with
lane lines other than white (yellow)
lines, such as an expressway.
CAUTION
Heed the following cautions so that
the LAS can operate normally.
Do not modify the vehicle's
suspensions.
 Always use tires of the speci fied type
and size for the front and rear
wheels. Consult an Authorized
Mazda Dealer for tire replacement.
NOTE
The system may not operate normally
under the following conditions.
The white (yellow) lane lines are less
visible because of dirt or paint
fl aking.
White (yellow) lane lines are less
visible because of bad weather (rain,
fog , or snow).
The vehicle is driven on a temporary
lane or section with a closed lane
resulting from construction where
there might be multiple white
(yellow) lane lines, or they are
interrupted.
The camera picks up an obscure line,
such as a temporary line being used
for construction, or because of
shade, unmelted snow, or grooves
filled with water.
The surrounding brightness suddenly
changes such as when entering or
exiting a tunnel.
Back-light is re flected off the road
surface.
The road surface is wet and shiny
after rain, or there are puddles on
the road.
The width of a lane is excessively
narrow.
The vehicle is driven on roads with
tight curves.
Heavy luggage is loaded in the
trunk/luggage compartment or on
the rear seat causing the vehicle to
tilt.
The vehicle is driven through a fork in
the road or a junction.
The shade of a guardrail parallel to a
white (yellow) lane line is cast on the
road.
The illumination of the headlights is
weakened because of dirt or the
optical axis is deviated at night.
The road is excessively uneven.The vehicle is shaken after hitting a
road bump.
A vehicle in front of your vehicle is
running near a white (yellow) lane
line making it less visible.
The windshield is dirty or foggy.Strong light is directed from the front
of the vehicle (such as sunlight, or
headlights (high-beam) of
on-coming vehicles).
When Driving
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Do not apply a sticker to a rear
ultrasonic sensor and rear camera.
Otherwise, the rear ultrasonic
sensor and rear camera may not be
able to detect vehicles or
obstructions which could result in
an accident.
 Do not disassemble a rear
ultrasonic sensor and rear camera.
 If cracks or damage caused by
flying gravel or debris is visible
around a rear ultrasonic sensor and
rear camera, stop using the SBS -R
system immediately and have your
vehicle inspected by an Authorized
Mazda Dealer. If the vehicle
continues to be driven with cracks
or scratch marks left around an
ultrasonic sensor, the system may
operate unnecessarily and cause
an unexpected accident.
Refer to Stopping the Smart Brake
Support [Rear] (SBS -R) System
Operation on page 4-163.
 Consult an Authorized Mazda
Dealer for rear bumper removal.
Do not modify the suspension:
If the vehicle height or inclination is
changed, the SBS -R system may not
operate correctly because it cannot
detect obstructions correctly.Do not apply a strong force to a rear
ultrasonic sensor and rear camera:
When washing the vehicle, do not
spray highly pressurized water against a
rear ultrasonic sensor and rear camera,
or rub it strongly. In addition, do not
hit the rear bumper forcefully when
loading and unloading cargo.
Otherwise, the sensors may not detect
obstructions correctly which could
cause the SBS -R system to not operate
normally, or it could operate
unnecessarily.
CAUTION
 When driving o ff-road in areas where
there is grass or foliage, it is
recommended that the SBS-R system
be turned o ff.
 Always use tires of the speci fied size
and the same manufacturer, brand,
and tread pattern on all 4 wheels. In
addition, do not use tires with signi ficantly di fferent wear patterns
on the same vehicle. Otherwise, the SBS -R system may not operate
normally.
 If ice or snow is stuck on the rear
ultrasonic sensor and rear camera
they may not be able to detect
obstructions correctly depending on
the conditions. In such cases, the
system may not be able to perform
controls correctly. Always drive
carefully and pay attention to the
rear of the vehicle.
When Driving
i-ACTIVSENSE
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To assure the correct operation of the
SBS-RC, heed the following cautions.
 Do not apply a sticker to a rear radar
and rear camera. Otherwise, the rear
radar and rear camera may not be
able to detect vehicles or
obstructions which could result in an
accident.
 Do not disassemble a rear radar and
rear camera.
 If cracks or damage caused by flying
gravel or debris is visible around a
rear radar and rear camera, stop
using the SBS -RC system
immediately and have your vehicle
inspected by an Authorized Mazda
Dealer. If the vehicle continues to be
driven with cracks or scratch marks
left around an ultrasonic sensor, the
system may operate unnecessarily
and cause an unexpected accident.
Refer to Stopping the Smart Brake
Support [Rear Crossing] (SBS -RC)
System Operation on page 4-168.
 Consult an Authorized Mazda Dealer
for rear bumper removal.
Do not modify the suspension:
If the vehicle height or inclination is
changed, the SBS -RC system may not
operate correctly because it cannot
detect obstructions correctly.Do not apply a strong force to a rear
radar and rear camera:
When washing the vehicle, do not
spray highly pressurized water against a
rear radar and rear camera, or rub it
strongly. In addition, do not hit the rear
bumper forcefully when loading and
unloading cargo. Otherwise, the
sensors may not detect obstructions
correctly which could cause the
SBS -RC system to not operate
normally, or it could operate
unnecessarily.
NOTE
The SBS -RC system will operate
under the following conditions.
The engine is running for 3 seconds
or more.
The shift lever (manual
transmission ve hicle) or the
selector lever (automatic
transmission vehicl e) is in the R
(reverse) position.
i-ACTIVSENSE warning indication/
warning light is not displayed in the
multi-information display.
The vehicle speed is under about
10 km/h (6 mph).
The vehicle speed of an
approaching vehicle is about 3
km/h (2 mph) or faster.
The SBS-R is not turned
off.The DSC is not malfunctioning.In the following cases, the
i-ACTIVSENSE warning indication/
warning light turns on and operation
of the system is stopped. If the
i-ACTIVSENSE warning indication/
warning light remains illuminated,
have the vehicle inspected at an
Authorized Mazda Dealer as soon as
possible.
Some problem with the system
including the SBS -RC system.
When Driving
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WARNING
Always confirm the safety of the area
around the vehicle with the mirrors
and directly with your eyes when
driving:
The 360°View Monitor is an auxiliary
device which assi sts the driver in
checking the safety of the area around
the vehicle.
The shooting range of the cameras and
detection range of the sensors are
limited. For example, the areas in black
at the front and rear of the vehicle
image and the seams where each of
the camera images merge are blind
spots where an obstruction may not be
visible. In addition, the extended
vehicle width lines and projected
vehicle path lines are only to be used
as references, and the images on the
screen may di ffer from the actual
conditions.
CAUTION
 Do not use the 360°View Monitor
under any of the following
conditions.
 Icy or snow-covered roads.
 Tire chains or a temporary spare
tire is installed.
 The front or rear doors are not fully
closed.
 The vehicle is on a road incline.
 The door mirrors are retracted.
 Do not hit the front/rear camera,
front/rear bumper, and door mirrors
forcefully. The camera position or
installation angle may shift.
 The cameras are waterproof. Do not
disassemble, modify, or remove a
camera.
The camera cover is made of hard
plastic, therefore do not apply oil
fi lm remover, organic solvents, wax,
or coating agents. If any such agent
gets on the camera cover, wipe it o ff
using a soft cloth immediately.
 Do not rub the camera lens
forcefully, or clean it with an abrasive
or hard brush. Otherwise, it could
scratch the camera lens and
negatively a ffect the images.
 Consult an Authorized Mazda Dealer
for repair, painting, or replacement
of the front/rear camera, front/rear
bumper and door mirrors.
 Heed the following cautions to
assure that the 360°View Monitor
operates normally.
 Do not modify the vehicle
suspensions or lower/raise the
vehicle body, or both.
 Always use tires of the speci fied
type and size for the front and rear
wheels. Consult an Authorized
Mazda Dealer for tire replacement.
 When the display is cold, images
may leave trails or the screen might
be darker than usual, making it
diffi cult to check the vehicle
surroundings. Always con firm the
safety at the front and around the
vehicle visually when driving.
When Driving
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Forward Sensing Camera(FSC)
*
▼Forward Sensing Camera (FSC)
Your vehicle is equipped with a
Forward Sensing Camera (FSC). The
Forward Sensing Camera (FSC) is
positioned near the rearview mirror
and used by the following systems.
High Beam Control System (HBC)Lane Departure Warning System
(LDWS)
Tra
ffic Sign Recognition System (TSR)Distance & Speed Alert (DSA)Driver Attention Alert (DAA)Mazda Radar Cruise Control
(MRCC)
Mazda Radar Cruise Control with
Stop & Go function (MRCC with
Stop & Go function)
Lane-keep Assist System (LAS)Tra
ffic Jam Assist (TJA)Smart Brake Support (SBS)
1. Forward Sensing Camera (FSC)

The Forward Sensing Camera (FSC)
determines the conditions ahead of
the vehicle while traveling at night and
detects tra
ffic lanes. The distance in
which the Forward Sensing Camera
(FSC) can detect objects varies
depending on the surrounding
conditions.
WARNING
Do not modify the suspension:
If the vehicle height or inclination is
changed, the system will not be able to
correctly detect vehicles ahead. This
will result in the system not operating
normally or mistakenly operating,
which could cause a serious accident.
CAUTION
 Do not apply accessories, stickers or
film to the windshield near the
Forward Sensing Camera (FSC).
If the area in front of the Forward
Sensing Camera (FSC) lens is
obstructed, it will cause the system
to not operate correctly.
Consequently, each system may not
operate normally which could lead
to an unexpected accident.
 Do not disassemble or modify the
Forward Sensing Camera (FSC).
Disassembly or
modification of the
Forward Sensing Camera (FSC) will
cause a malfunction or mistaken
operation. Consequently, each
system may not operate normally
which could lead to an unexpected
accident.
 Heed the following cautions to
assure the correct operation of the
Forward Sensing Camera (FSC).
 Be careful not to scratch the
Forward Sensing Camera (FSC)
lens or allow it to get dirty.
When Driving
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Do not adhere stickers (including
transparent stickers) to the surface of
the radiator grille and front emblem
in and around the front radar sensor,
and do not replace the radiator grille
and front emblem with any product
that is not a genuine product
designed for use with the front radar
sensor.
 The front radar sensor includes a
function for detecting soiling of the
radar sensor's front surface and
informing the driver, however,
depending on the conditions, it may
require time to detect or it may not
detect plastic shopping bags, ice or
snow. If this occurs, the system may
not operate correctly, therefore
always keep the front radar sensor
clean.
 Do not install a grille guard.
 If the front part of the vehicle has
been damaged in a vehicle accident,
the position of the front radar sensor
may have moved. Stop the system
immediately and always have the
vehicle inspected at an Authorized
Mazda Dealer.
 Do not use the front bumper to push
other vehicles or obstructions such
as when pulling out of a parking
space. Otherwise, the front radar
sensor could be hit and its position
deviated.
 Do not remove, disassemble, or
modify the front radar sensor.
 For repairs, replacement or paint
work around the front radar sensor,
consult an Authorized Mazda Dealer.
 Do not modify the suspensions. If
the suspensions are modi fied, the
vehicle's posture could change and
the front radar sensor may not be
able to correctly detect a vehicle
ahead or an obstruction.NOTE
Under the following conditions, the
front radar sensor may not be able to
detect vehicles ahead or obstructions
correctly and each system may not
operate normally.
The rear surface of a vehicle ahead
does not reflect radio waves
e ff ectively, such as an unloaded
trailer or an automobile with a
loading platform covered by a soft
top, vehicles with a hard plastic
tailgate, and round-shaped
vehicles.
Vehicles ahead with low vehicle
height and thus less area for
re flecting radio waves.
Visibility is reduced due to a
vehicle ahead casting off
water,
snow, or sand from its tires and
onto your windshield.
The trunk/luggage compartment is
loaded with heavy objects or the
rear passenger seats are occupied.
Ice, snow, or soiling is on the front
surface of the front emblem.
During inclement weather such as
rain, snow, or sand storms.
When driving near facilities or
objects emitting strong radio
waves.
Under the following conditions, the
front radar sensor may not be able to
detect vehicles ahead or
obstructions.
The beginning and end of a curve.Roads with continuous curves.Narrow lane roads due to road
construction or lane closures.
The vehicle ahead enters the radar
sensor's blind spot.
The vehicle ahead is running
abnormally due to accident or
vehicle damage.
When Driving
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