2021 MAZDA MODEL 6 coolant reservoir

Engine Compartment Overview
Windshield washer fluid reservoir
Engine oil-filler cap
Engine oil dipstick BatteryFuse block
Cooling system cap
Engine coolant reservoir
Windshield washer fluid reservoir
Engine oil-filler cap
Brake fluid reservoir
Engine oil dipstick Battery
Fuse block
Cooling system cap
Engine coolant reservoir
SKYACTIV-G 2.5
SKYACTIV-G 2.5T Brake fluid reservoir
Maintenance and Care
Owner Maintenance
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Windshield washer fluid reservoir
Engine oil-filler cap
Engine oil dipstick Battery
Fuse block
Cooling system cap
Engine coolant reservoir
SKYACTIV-D 2.2
Brake fluid reservoir
Maintenance and Care
Owner Maintenance
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NOTE
(SKYACTIV-D 2.2)
When inspecting the engine oil level,
pull out the dipstick straight without
twisting. In addition, when inserting
the dipstick, always insert it without
twisting so that the “X” mark faces the
front of the vehicle.
5. Pull it out again and examine the level. The level is normal if it is between the
MIN and MAX marks.
If it is near or below MIN, add enough
oil to bring the level to MAX.
CAUTION
Do not overfill the engine oil. This may
cause engine damage.
6. Make sure the O-ring on the dipstick is positioned properly before reinserting
the dipstick.
7. Reinsert the dipstick fully.
NOTE
(SKYACTIV-D 2.2)
Inspect the engine oil level
periodically. When inspecting the
engine oil, if the engine oil level is
exceeds the “X” mark on the dipstick,
replace the engine oil. This should be
done by an Authorized Mazda Dealer.
When replacing the engine oil, inspect
the oil level using the oil dipstick and
refill so that the engine oil level is
within the range between MIN and
MAX as shown in the figure.
X Mark
MAX
MIN
Engine Coolant
▼ Inspecting Coolant Level
WA R N I N G
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 off 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 indefinitely 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.
Maintenance and Care
Owner Maintenance
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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 F and L marks on
the coolant reservoir when the engine is
cool.
SKYACTIV-G 2.5

SKYACTIV-G 2.5T

SKYACTIV-D 2.2

If it is at or near L, add enough coolant to
the coolant reservoir to provide freezing
and corrosion protection and to bring the
level to F.
Securely tighten the coolant reservoir tank
cap after adding coolant.
Maintenance and Care
Owner Maintenance
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CAUTION
Radiator coolant will damage paint.
Rinse it off 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 reser voir is empty or new
coolant is required frequently, consult an
Authorized Mazda Dealer.
Brake Fluid
▼ Inspecting Brake Fluid Level
WA R N I N G
If the brake fluid level is low, have the
brakes inspected:
A low brake
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.
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 linings. If it
is excessively low, have the brake system
inspected by an Authorized Mazda Dealer.
Maintenance and Care
Owner Maintenance
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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 2.5
Cooling system capCoolant
reservoir
Cooling fan
SKYACTIV-G 2.5T

Cooling system cap
Coolant reservoir
Cooling fan
SKYACTIV-D 2.2
Coolant reservoir
Cooling fanCooling system cap
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required (page
6-26).
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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