coolant level MAZDA MODEL 3 HATCHBACK 2021 Owners Manual

▼Cooling (With A/C switch)
1. Press the switch.
2. Set the temperature control dial to the cold position.
3. Set the fan control dial to the desired speed.
4. Turn on the air conditioner by pressing the A/C switch.
5. After cooling begins, adjust the fan control dial and temperature
control dial as needed to maintain
maximum comfort.
CAUTION
If the air conditioner is used while
driving up long hills or in heavy tra ffic,
monitor the high engine coolant
temperature warning indication to see
if it is displayed (page 7-29).
The air conditioner may cause engine
overheating. If the warning indication
is displayed, turn the air conditioner
o ff (page 7-21).
NOTE
When maximum cooling is desired,
set the temperature control dial to
the extreme cold position and set
the air intake selector to the
recirculated air position, then turn
the fan control dial fully clockwise.
If warmer air is desired at floor level,
press the
switch and adjust the
temperature control dial to maintain
maximum comfort.
The air to the floor is warmer than air
to the face (except when the
temperature control dial is set at the
extreme hot or cold position).
▼ Ve n t i l a t i o n
1. Press the switch.
2. Set the air intake selector to the outside air position (indicator light
turns off ).
3. Set the temperature control dial to the desired position.
4. Set the fan control dial to the desired speed.
▼Windshield Defrosting and
Defogging
1. Press the switch.
2. Set the temperature control dial to the desired position.
3. Set the fan control dial to the desired speed.
4. If dehumidi fied heating is desired,
turn on the air conditioner.
WARNING
Do not defog the windshield using the
switch with the temperature
control set to the cold position:
Using the
switch with the
temperature control set to the cold
position is dangerous as it will cause
the outside of the windshield to fog
up. Your vision will be hampered,
which could lead to a serious accident.
Set the temperature control to the hot
or warm position when using the
switch.
NOTE
(With A/C switch)
Fogging on the windows clears up
more easily while the air conditioner
is on, but they will fog up more easily
if the air conditioner is turned o ff.
Interior Features
Climate Control System
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Scheduled Maintenance
▼Scheduled Maintenance (U.S.A. and Puerto Rico)
Vehicles utilizing the vehicle status monitor feature:
The vehicle status monitor feature alerts you of maintenance needs by turning on the
wrench indicator light or displaying a message in the instrument panel, or both.
Every maintenance must be done when the display/wrench indication comes on.
The display/wrench indication will come
on before reaching the maximum interval
of 16,000 km (10,000 miles), or 12 mont hs (after the previous maintenance).
If you drive your vehicle under any of th e following conditions, follow the Severe
Driving Scheduled Maintenance and replace the engine oil and filter every 8,000 km
(5,000 miles) or 6 months, whichever comes first.
Otherwise, follow the Normal Driv ing Scheduled Maintenance intervals.
1. The vehicle is idled for long periods or driven at low speeds, such as with police cars, taxis, or driver's education school car.
2. Driving under dusty conditions.
3. Driving for long periods in cold temperatures or driving regularly for short distan- ces only.
4. Driving under extremely high temperature conditions.
5. Driving continuously in mountainous regions.
If you are following the Severe Driving Scheduled Maintenance (8,000 km (5,000
miles) or 6 months oil replacement interval), set the vehicle status monitor manually.
Refer to the Information section in the Mazda Connect Owner's Manual. Please
contact an Authorized Mazda Dealer if necessary.
USA and Puerto Rico Residents (Nor mal Driving Scheduled Maintenance):
Maintenance ItemNumber of times, maintenance was performed.
12345678
Engine oil & filter
*1RRRRRRRR
Spark plugs SKYACTIV
-G
2.5T Replace every 64,000 km (40,000 miles).
Except SKY -
ACTIV -G
2.5T Replace every 120,000 km (75,000 miles).
Air filter RR
Drive belts IIIIIIII
Engine coolant level IIIIIIII
Engine coolant
*2Replace at first 192,000 km (120,000 miles) or 120
months; after that, every 96,000 km (60,000 miles) or 60 months.
Fuel lines & hoses
*3IIII
Hoses and tubes for emission
*3II
Maintenance and Care
Scheduled Maintenance
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Maintenance ItemNumber of times, maintenance was performed.
12345678
B ra ke lin es, h ose s a nd c onnectio ns IIII
Vacuum brake booster and
hose With vac-
uum booster
IIII
Brake and clutch fluid level IIIIIIII
Brake fluid With electri-
cal booster
RRRR
Disc brakes IIIIIIII
Tire rotation Rotate every 16,000 km (10,000 miles).
Tire in flation pressure and tire wear
*4IIIIIIII
S te erin g o pera tio n a nd lin ka ge s IIII
Front and rear suspension, ball joints and
wheel bearing axial play IIII
D riv e sh aft d ust b oo t IIII
Bolts and nuts on chassis and body TTTT
Exhaust system and heat shields II
Emergency flat tire repair kit (if equipped)
*5Inspect annually.
Cabin air filter Replace every 48,000 km (30,000 miles) or 24
months.
Function of all lights IIIIIIII
Chart symbols:
I : Inspect: Inspect and clean, repair, adjust, fill up, or replace if necessary.
R : Replace
T: Tighten
Remarks:
*1 Reset the engine oil data whenever replacing the engine oil regardless of the message/wrench indicator light display.
*2Use of FL-22 is recommended when replacing engine coolant. Using engine coolant other than
FL-22
may cause serious damage to the engine and cooling system.
*3 According to state/provincial and federal regulations, failure to perform maintenance on these items will not void your emissions warranties. However, Mazda recommends that all maintenance services
be performed at the recommended time or mileage/kilometer period to ensure long-term reliability.
*4 Inspect a spare tire if equipped.*5Check the tire repair fl uid expiration date every year when performing the periodic maintenance.
Replace the tire repair fluid bottle with new one before the expiration date.
Maintenance and Care
Scheduled Maintenance
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Maintenance IntervalNumber of months or kilometers (miles), whichever comes
first.
Months 6 1218243036424854606672
×1000 km 8 16 24 32 40 48 56 64 72 80 88 96
×1000miles 5 1015202530354045505560
Spark plugs SKYACTIV
-G
2.5T Replace every 64,000 km (40,000 miles).
Except SKY -
ACTIV -G
2.5T Replace every 120,000 km (75,000 miles).
Air filter Replace every 56,000 km (35,000 miles) or 36 months.
Drive belts
*3II
Engine coolant level IIIIIIIIIIII
Engine coolant
*4Replace at first 192,000 km (120,000 miles) or 120
months; after that, every 96,000 km (60,000 miles) or 60
months.
Fuel lines & hoses
*5III
Hoses and tubes for emission
*5I
Brake lines, hoses and connections III
Vacuum brake booster and
hose With vac-
uum booster
IIIIII
Brake fluid With electri-
cal booster
RRR
Disc brakes I C/L II/C
/L IC/LI I/C
/L
Tire rotation Rotate every 8,000 km (5,000 miles).
Tire in flation pressure and tire wear
*6IIIIIIIIIIII
Steering operation and linkages III
Front and rear suspension, ball joints and
wheel bearing axial play III
Body condition inspection for rust, corro-
sion and perforation IIIIII
Driveshaft dust boot III
Bolts and nuts on chassis and body TTT
Exhaust system and heat shields I
Emergency flat tire repair kit (if equip-
ped)
*7Inspect annually.
Cabin air filter Replace every 40,000 km (25,000 miles) or 24 months.
Maintenance and Care
Scheduled Maintenance
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▼Scheduled Maintenance (Mexico)
Vehicles utilizing the vehicle status monitor feature:
The vehicle status monitor feature alerts you of maintenance needs by turning on the
wrench indicator light or displaying a message in the instrument panel, or both.
Every maintenance must be done when the display/wrench indication comes on.
The display/wrench indication will come on before reaching the maximum interval
of 10,000 km, or 6 months (aft
er the previous maintenance).
If you drive your vehicle under any of the following conditions, follow the Severe
Driving Scheduled Maintenance and replace the engine oil and filter every 5,000 km
or 3 months, whichever comes first.
Otherwise, follow the Normal Driving Scheduled Maintenance intervals.
1. The vehicle is idled for long periods or driven at low speeds, such as with police cars, taxis, or driver's education school car.
2. Driving under dusty conditions.
3. Driving for long periods in cold temperat ures or driving regularly for short distan-
ces only.
4. Driving under extremely high temperature conditions.
5. Driving continuously in mountainous regions.
If you are following the Severe Driving Scheduled Maintenance (5,000 km or 3
months oil replacement interval), set the vehicle status monitor manually.
Refer to the Information section in th e Mazda Connect Owner's Manual. Please
contact an Authorized Mazda Dealer if necessary.
Mexico Residents (Normal Driv ing Scheduled Maintenance):
Maintenance Item Number of times, maintenance was performed.
12345678
Engine oil & filter
*1RRRRRRRR
Spark plugs SKYACTIV
-G
2.5T IIIIIIII
Replace every 64,000 km
Except SKY -
ACTIV -G
2.5T IIIIIIII
Replace every 120,000 km.
Air filte r RRRR
Drive belts IIIIIIII
Engine coolant level IIIIIIII
Engine coolant
*2Replace at first 192,000 km or 120 months; after that,
every 96,000 km or 60 months.
Fuel lines & hoses
*3II
Hoses and tubes for emission
*3II
Fuel filter Replace every 60,000 km.
Maintenance and Care
Scheduled Maintenance
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Maintenance ItemNumber of times, maintenance was performed.
12345678
Brake lines, hoses and connections II II
Vacuum brake booster and
hose With vacuum
booster
IIII
Brake and clutch fl uid level III III
Brake fluid RR
Disc brakes IIIIIIII
Tire rotation Rotate every 10,000 km.
Tire in flation pressure and tire wear
*4IIIIIIII
Steering operation and linkages I I I I I I I I
Front and rear suspension, ball joints and
wheel bearing axial play IIII
Driveshaft dust boot II II
Bolts and nuts on chassis and body TTT T
Exhaust system and heat shields II II
Emergency flat tire repair kit (if equipped)
*5Inspect annually.
Cabin air filter Replace every 40,000 km or 24 months.
Function of all lights IIIIIIII
Chart symbols:
I: Inspect: Inspect and clean, repair, adjust, fill up, or replace if necessary.
R : Replace
T: Tighten
Remarks:
*1 Reset the engine oil data whenever replacing the engine oil regardless of the message/wrench indicator light display.
*2Use of FL -22 is recommended when replacing engine c oolant. Using engine coolant other than FL-22
may cause serious damage to the engine and cooling system.
*3 According to state/provincial and federal regulati ons, failure to perform maintenance on these items
will not void your emissions warranties. However, Mazda recommends that all maintenance services
be performed at the recommended time or mileage/kilometer period to ensure long-term reliability.
*4 Inspect a spare tire if equipped.*5Check the tire repair fl uid expiration date every year when performing the periodic maintenance.
Replace the tire repair fluid bottle with new one before the expiration date.
Maintenance and Care
Scheduled Maintenance
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Owner MaintenancePrecautions
▼Owner Maintenance Precautions
The owner or a qualified service
technician should make these vehicle
inspections at the indicated intervals to
ensure safe and dependable
operation.

Bring any problem to the attention of
an Authorized Mazda Dealer or
qualifi
ed service technician as soon as
possible.
When Refueling
Brake and clutch fluid level (page
6-21)
Engine coolant level (page 6-20)Engine oil level (page 6-19)Washer fluid level (page 6-22)
At Least Monthly
Tire in flation pressures (page 6-34)
At Least Twice a Year (For Example,
Every Spring and Fall)
You can do the following scheduled
maintenance items if you have some
mechanical ability and a few basic
tools and if you closely follow the
directions in this manual.
Engine coolant (page 6-20)Engine oil (page 6-19)

Improper or incomplete service may
result in problems. This section gives
instructions only for items that are easy
to perform.

As explained in the Introduction (page
6-2), several procedures can be done
only by a qualifi ed service technician
with special tools.

Improper owner maintenance during
the warranty period may a ffect
warranty coverage. Refer to
Introduction (page 6-2) for owner's
responsibility in protecting your
investment. For details, read the
separate Mazda Warranty statement
provided with the vehicle. If you are
unsure about any servicing or
maintenance procedure, have it done
by an Authorized Mazda Dealer.

There are strict environmental laws
regarding the disposal of waste oil and
fl uids. Please dispose of your waste
properly and with due regard to the
environment.

We recommend that you entrust the oil
and fluid changes of your vehicle to an
Authorized Mazda Dealer.
WARNING
Do not perform maintenance work if
you lack su fficient knowledge and
experience or the proper tools and
equipment to do the work. Have
maintenance work done by a
quali fied technician:
Performing maintenance work on a
vehicle is dangerous if not done
properly. You can be seriously injured
while performing some maintenance
procedures.
Maintenance and Care
Owner Maintenance
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Engine Coolant
▼Inspecting Coolant Level
WARNING
Do not use a match or live
flame in
the engine compartment. DO NOT
ADD COOLANT WHEN THE ENGINE
IS HOT :
A hot engine is dangerous. If the
engine has been running, parts of the
engine compartment can become very
hot. You could be burned. Carefully
inspect the engine coolant in the
coolant reservoir, but do not open it.
Pull over to a safe location, then
switch the ignition o ff and make sure
the fan is not running before
attempting to work near the cooling
fan:
Working near the cooling fan when it is
running is dangerous. The fan could
continue running inde finitely even if
the engine has stopped and the engine
compartment temperature is high. You
could be hit by the fan and seriously
injured.
Do not remove either
cooling system cap when the engine
and radiator are hot:
When the engine and radiator are hot,
scalding coolant and steam may shoot
out under pressure and cause serious
injury.
NOTE
Changing the coolant should be done
by an Authorized Mazda Dealer.
Inspect the antifreeze protection and
coolant level in the coolant reservoir at
least once a year ―at the beginning of
the winter season ―and before
traveling where temperatures may drop
below freezing.

Inspect the condition and connections
of all cooling system and heater hoses.
Replace any that are swollen or
deteriorated.

The coolant should be at full in the
radiator and between the FULL and
LOW marks on the coolant reservoir
when the engine is cool.
SKYACTIV -G 2.0 and SKYACTIV -G
2.5

Maintenance and Care
Owner Maintenance
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SKYACTIV-G 2.5T

FULL
LOW
If it is at or near LOW, add enough
coolant to the coolant reservoir to
provide freezing and corrosion
protection and to bring the level to
FULL.
Securely tighten the coolant reservoir
tank cap after adding coolant.
CAUTION
 Radiator coolant will damage paint.
Rinse it o ff quickly if spilled.
 If the “FL22” mark is shown on or
near the cooling system cap, use of
FL-22 is recommended when
replacing engine coolant. Using
engine coolant other than FL -22 may
cause serious damage to the engine
and cooling system.

If the coolant reservoir is empty or new
coolant is required frequently, consult
an Authorized Mazda Dealer.
Brake/Clutch Fluid
▼ Inspecting Brake/Clutch Fluid
Level
WARNING
If the brake/clutch
fluid level is low,
have the brakes inspected:
A low brake/clutch fluid level is
dangerous.
A low level could indicate brake lining
wear or a brake system leak which
could cause the brakes to fail and lead
to an accident.
The brakes and clutch draw fluid from
the same reservoir.
Inspect the fluid level in the reservoir
regularly. It should be kept between
the MAX and MIN lines.
The level normally drops with
accumulated distance, a condition
associated with wear of brake and
clutch linings. If it is excessively low,
have the brake/clutch system
inspected by an Authorized Mazda
Dealer.
Maintenance and Care
Owner Maintenance
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6. Make sure the cooling fan isoperating, then turn o ff the engine
after the temperature has
decreased.
7. When cool, check the coolant level. If it is low, look for coolant leaks
from the radiator and hoses.

If you find a leak or other damage, or
if coolant is still leaking:
Stop the engine and call an Authorized
Mazda Dealer.
SKYACTIV -G 2.0 and SKYACTIV -G
2.5
1. Cooling system cap
2. Cooling fan
3. Coolant reservoir

SKYACTIV -G 2.5T
1. Coolant reservoir
2. Cooling fan
3. Cooling system cap

If you
find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required
(page 6-20).
CAUTION
If the engine continues to overheat or
frequently overheats, have the cooling
system inspected. The engine could be
seriously damaged unless repairs are
made. Consult an Authorized Mazda
Dealer.
If Trouble Arises
Overheating
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