Infiniti QX50 (2021 year). Manual in english — page 27

When performing any inspection or mainte-
nance work on your vehicle, always take care
to prevent serious accidental injury to your-
self or damage to the vehicle. The following
are general precautions which should be
closely observed.

WARNING

•

Park the vehicle on a level surface, apply
the parking brake securely and block the
wheels to prevent the vehicle from mov-
ing. Move the shift lever to P (Park).

•

Be sure the ignition switch is in the OFF
or LOCK position when performing any
parts replacement or repairs.

•

If you must work with the engine run-
ning, keep your hands, clothing, hair and
tools away from moving fans, belts and
any other moving parts.

•

It is advisable to secure or remove any
loose clothing and remove any jewelry,
such as rings, watches, etc. before work-
ing on your vehicle.

•

Always wear eye protection whenever
you work on your vehicle.

•

Your vehicle is equipped with an auto-
matic engine cooling fan. It may come on
at any time without warning, even if the
ignition switch is in the OFF position and

the engine is not running. To avoid injury,
always disconnect the negative battery
cable before working near the fan.

•

If you must run the engine in an enclosed
space such as a garage, be sure there is
proper ventilation for exhaust gases to
escape.

•

Never get under the vehicle while it is
supported only by a jack. If it is necessary
to work under the vehicle, support it
with safety stands.

•

Keep smoking materials, flame and sparks
away from the fuel tank and battery.

•

Because the fuel lines on gasoline engine
models are under high pressure even
when the engine is off, it is recommended
that you visit an INFINITI retailer for ser-
vice of the fuel filter or fuel lines.

CAUTION

•

Do not work under the hood while the
engine is hot. Turn the engine off and
wait until it cools down.

•

Avoid contact with used engine oil and
coolant. Improperly disposed engine oil,
engine coolant and/or other vehicle flu-
ids can damage the environment. Always
conform to local regulations for disposal
of vehicle fluid.

•

Never leave the engine or Continuously
Variable Transmission (CVT) related
component

harnesses

disconnected

while the ignition switch is in the ON
position.

•

Never connect or disconnect the battery
or any transistorized component while
the ignition switch is in the ON position.

NOTE:

If the battery is completely drained the
transmission will not manually shift to other
positions.

This “Do-it-yourself” section gives instruc-
tions regarding only those items which are
relatively easy for an owner to perform.

A Genuine INFINITI service manual is also
available. For additional information, see
“Owner’s Manual/Service Manual order in-
formation” (P. 10-33).

You should be aware that incomplete or im-
proper servicing may result in operating diffi-
culties or excessive emissions, and could af-
fect warranty coverage.

If in doubt about any

servicing, it is recommended that you have it
done by an INFINITI retailer.

MAINTENANCE PRECAUTIONS

8-2

Do-it-yourself

2.0L 4 Cylinder (KR20DDET engine model)

1.

Engine coolant reservoir

2.

Drive belt location

3.

Air cleaner

4.

Brake fluid reservoir

5.

Battery

6.

Fuse/Fusible link box

7.

Windshield-washer fluid reservoir

8.

Engine oil filler cap

9.

Engine oil dipstick

LDI3173

ENGINE COMPARTMENT CHECK
LOCATIONS

Do-it-yourself

8-3

The engine cooling system is filled at the
factory with a pre-diluted mixture of 50%
Genuine NISSAN Long Life Antifreeze/
Coolant (blue) and 50% water to provide
year-round antifreeze and coolant protec-
tion. The antifreeze solution contains rust
and corrosion inhibitors. Additional engine
cooling system additives are not necessary.

WARNING

•

Never remove the coolant reservoir cap
when the engine is hot. Wait until the
engine and radiator cool down. Serious
burns could be caused by high pressure
fluid escaping from the radiator. For ad-
ditional information on precautions, see
“If your vehicle overheats” (P. 6-7).

•

The coolant reservoir is equipped with a
pressure type coolant reservoir cap. To
prevent engine damage, use only a Genu-
ine NISSAN coolant reservoir cap.

CAUTION

•

Never use any cooling system additives
such as radiator sealer. Additives may
clog the cooling system and cause dam-
age to the engine, transmission and/or
cooling system.

•

When adding or replacing coolant, be
sure to use only Genuine NISSAN Long
Life

Antifreeze/Coolant

(blue)

or

equivalent. Genuine NISSAN Long Life
Antifreeze/Coolant (blue) is pre-diluted
to provide antifreeze protection to -34°
F (-37° C). If additional freeze protection
is needed due to weather where you op-
erate your vehicle, add Genuine NISSAN
Long Life Antifreeze/Coolant (blue)
concentrate following the directions on
the container. If an equivalent coolant
other than Genuine NISSAN Long Life
Antifreeze/Coolant (blue) is used, fol-
low the coolant manufacturer’s instruc-
tions to maintain minimum antifreeze
protection to -34° F (-37° C). The use of
other types of coolant solutions other
than

Genuine

NISSAN

Long

Life

Antifreeze/Coolant (blue) or equivalent
may damage the engine cooling system.

•

The life expectancy of the factory-fill
coolant is 105,000 miles (168,000 km)
or 7 years. Mixing any other type of cool-
ant other than Genuine NISSAN Long
Life

Antifreeze/Coolant

(blue)

(or

equivalent coolant), including Genuine
NISSAN Long Life Antifreeze/Coolant
(green), or the use of non-distilled water
may reduce the life expectancy of the
factory-fill coolant. For additional infor-
mation, see “Maintenance and sched-
ules” (P. 9-2).

ENGINE COOLING SYSTEM

8-4

Do-it-yourself

CHECKING ENGINE COOLANT
LEVEL

Check the coolant level

in the reservoir when

the engine is cold.

If the coolant level is below

the MIN level

O

B

, add coolant to the MAX

level

O

A

.

This vehicle contains Genuine NISSAN Long
Life Antifreeze/Coolant (blue). The life ex-
pectancy

of

the

factory-fill

coolant

is

105,000 miles (168,000 km) or 7 years.
Mixing any other type of coolant or the use of
non-distilled water will reduce the life expec-
tancy of the factory-fill coolant. For addi-

tional information, see "Maintenance and
schedules" (P. 9-2).

If the cooling system frequently requires
coolant, have it checked. It is recommended
that you visit an INFINITI retailer for this
service.

For additional information on the location of
the engine coolant reservoir, see “Engine
compartment check locations” (P. 8-3).

CHANGING ENGINE COOLANT

An INFINITI retailer can change the engine
coolant. The service procedure can be found
in the INFINITI Service Manual.

Improper servicing can result in reduced
heater performance and engine overheating.

WARNING

•

To avoid the danger of being scalded,
never change the coolant when the en-
gine is hot.

•

Never remove the coolant reservoir cap
when the engine is hot. Serious burns
could be caused by high pressure fluid
escaping from the radiator.

•

Avoid direct skin contact with used cool-
ant. If skin contact is made, wash thor-
oughly with soap or hand cleaner as soon
as possible.

•

Keep coolant out of the reach of children
and pets.

Engine coolant must be disposed of properly.
Check your local regulations.

LDI3157

Do-it-yourself

8-5

CHECKING ENGINE OIL LEVEL

1. Park the vehicle on a level surface and

apply the parking brake.

2. Start the engine and let it idle until it

reaches operating temperature.

3. Turn off the engine.

Wait more than 10

minutes for the oil to drain back into the
oil pan.

4. Remove the dipstick and wipe it clean.

Reinsert it all the way.

5. Remove the dipstick again and check the

oil level. It should be between the H (High)
and L (Low) marks

O

B

. This is the normal

operating oil level range. If the oil level is
below the L (Low) mark

O

A

, remove the oil

filler cap and pour recommended oil
through the opening.

Do not fill oil level

above H (High) mark

O

C

.

6. Recheck the oil level with the dipstick.

It is normal to add some oil between oil main-
tenance intervals or during the break-in pe-
riod, depending on the severity of operating
conditions.

CAUTION

Oil level should be checked regularly. Oper-
ating the engine with an insufficient
amount of oil can damage the engine, and
such damage is not covered by warranty.

CHANGING ENGINE OIL AND OIL
FILTER

For additional information on engine oil and
oil filter change, refer to the instructions out-
lined in this section.

Vehicle set-up

1. Park the vehicle on a level surface and

apply the parking brake.

2. Run the engine until it reaches operating

temperature.

3. Turn the engine off and wait for 15

minutes.

4. Raise and support the vehicle using a suit-

able floor jack and safety jack stands.

• Place the safety jack stands under the ve-

hicle jack-up points.

• A suitable adapter should be attached to

the jack stand saddle.

LDI3158

LDI0371

ENGINE OIL

8-6

Do-it-yourself

CAUTION

Make sure the correct lifting and support
points are used to avoid vehicle damage.

LDI3443

O

1

Oil filler cap

LDI3376

O

2

Oil drain plug

Do-it-yourself

8-7

Removal of engine protectors

1. Remove

clips

O

A

and

under-engine

protector.

Engine oil and filter

1. Place a large drain pan under the drain

plug and oil filter.

2. Remove the oil filler cap.

3. Remove the drain plug with a wrench by

turning it counterclockwise and com-
pletely drain the oil.

LDI3377

O

3

Oil filter

LDI3444

O

4

Under engine protector

LDI3445

8-8

Do-it-yourself

CAUTION

Be careful not to burn yourself, as the en-
gine oil is hot.

WARNING

•

Prolonged and repeated contact with
used engine oil may cause skin cancer.

•

Try to avoid direct skin contact with
used oil. If skin contact is made, wash
thoroughly with soap or hand cleaner as
soon as possible.

•

Keep used engine oil out of reach of
children.

4. Loosen the oil filter with an oil filter

wrench by turning it counterclockwise.
Remove the oil filter by turning it by hand.

5. Wipe the engine oil filter mounting sur-

face with a clean rag.

CAUTION

Be sure to remove any old gasket material
remaining on the sealing surface of the en-
gine. Failure to do so could lead to an oil
leak and engine damage.

•

The dipstick must be inserted in place to
prevent oil spillage from the dipstick hole
when filling the engine with oil.

6. Coat the gasket on the new filter with

clean engine oil.

7. Screw in the oil filter clockwise until a

slight resistance is felt, then tighten addi-
tionally more than 2/3 turn.

Oil filter tightening torque:

14.7 to 20.6 N·m (11 to 15 ft-lb)

8. Clean and re-install the drain plug with a

new washer. Securely tighten the drain
plug with a wrench. Do not use excessive
force.

Drain plug tightening torque:

29.4 to 39.2 N·m (22 to 29 ft-lb)

9. Refill the engine with the recommended

oil through the oil filler opening, and install
the oil filler cap securely.

For additional information about drain and
refill capacity, see “Recommended fluids/
lubricants and capacities” (P. 10-2). The drain
and refill capacity depends on the oil tem-
perature and drain time. Use these specifica-
tions for reference only. Always use the dip-
stick to determine the proper amount of oil in
the engine.

10. Start the engine and check for leakage

around the drain plug and the oil filter.
Correct as required. Turn the engine off
and wait more than 15 minutes. Check
the oil level with the dipstick. Add engine
oil if necessary.

After the operation

1. Reinstall engine protectors in reverse or-

der of removal.

2. Lower the vehicle carefully to the ground.

3. Reset the oil control system. For addi-

tional information, see “Vehicle informa-
tion display” (P. 2-19)

• Dispose of waste oil and filter properly.
• Check your local regulations.

Do-it-yourself

8-9

CAUTION

•

INFINITI recommends using Genuine
NISSAN CVT Fluid NS-3 (or equivalent)
ONLY in INFINITI CVTs. Do not mix with
other fluids.

•

Do not use Automatic Transmission
Fluid (ATF) or manual transmission fluid
in an INFINITI CVT, as it may damage the
CVT. Damage caused by the use of fluids
other than as recommended is not cov-
ered under INFINITI's New Vehicle Lim-
ited Warranty outlined in your Warranty
Information Booklet.

•

Using fluids that are not equivalent to
Genuine NISSAN CVT Fluid NS-3 may
also damage the CVT. Damage caused by
the use of fluids other than as recom-
mended is not covered under INFINITI's
New Vehicle Limited Warranty outlined
in your Warranty Information Booklet.

When checking or replacement of CVT fluid is
required, it is recommended that you visit an
INFINITI retailer for this service.

WARNING

•

Use only new fluid from a sealed con-
tainer. Old, inferior or contaminated
fluid may damage the brake system. The
use of improper fluids can damage the
brake system and affect the vehicle's
stopping ability.

•

Clean the filler cap before removing.

•

Brake fluid is poisonous and should be
stored carefully in marked containers
out of reach of children.

CAUTION

Do not spill the fluid on any painted sur-
faces. This will damage the paint. If fluid is
spilled, immediately wash the surface with
water.

Check the fluid level in the reservoir. If the
brake fluid is below the MIN line

O

B

, the

brake warning light will illuminate. Add brake
fluid up to the MAX line

O

A

. For additional

information on the recommended type of
brake fluid, see “Recommended fluids/
lubricants and capacities” (P. 10-2).

If the brake fluid must be added frequently,
the brake system should be thoroughly
checked. It is recommended that you visit an
INFINITI retailer for this service.

For additional information on the location of
the brake fluid reservoir, see “Engine com-
partment check locations” (P. 8-3).

LDI3161

CONTINUOUSLY VARIABLE
TRANSMISSION (CVT) FLUID

BRAKE FLUID

8-10

Do-it-yourself

WINDSHIELD-WASHER FLUID
RESERVOIR

Fill the windshield-washer fluid reservoir pe-
riodically. Add windshield-washer fluid when
the “Low Washer Fluid” warning message
shows on the vehicle information display.

To fill the windshield-washer fluid reservoir,
lift the cap off the reservoir and pour the
windshield-washer fluid into the reservoir
opening.

Add a washer solvent to the washer for bet-
ter cleaning. In the winter season, add a
windshield-washer antifreeze. Follow the
manufacturer's instructions for the mixture
ratio.

Refill the reservoir more frequently when
driving

conditions

require

an

increased

amount of windshield-washer fluid.

Recommended fluid is Genuine NISSAN
Windshield Washer Concentrate Cleaner &
Antifreeze or equivalent.

CAUTION

•

Do not substitute engine antifreeze
coolant for windshield-washer fluid.
This may result in damage to the paint.

•

Do not fill the windshield-washer fluid
reservoir with washer fluid concentrates
at full strength. Some methyl alcohol
based washer fluid concentrates may
permanently stain the grille if spilled
while filling the windshield-washer fluid
reservoir.

•

Pre-mix washer fluid concentrates with
water to the manufacturer's recom-
mended levels before pouring the fluid
into the windshield-washer fluid reser-
voir. Do not use the windshield-washer
fluid reservoir to mix the washer fluid
concentrate and water.

LDI3162

WINDSHIELD-WASHER FLUID

Do-it-yourself

8-11

Caution symbols for battery

WARNING

O

1

No smoking, No exposed flames, No

Sparks

Do not expose the battery to flames or electrical sparks. Hydrogen gas generated by the battery is ex-

plosive. Explosive gases can cause blindness or injury.

O

2

Shield eyes

Handle the battery cautiously. Always wear eye protection glasses to protect against explosion or bat-

tery acid.

O

3

Keep away from children

Never allow children to handle the battery. Keep the battery out of the reach of children.

O

4

Battery acid

Do not allow battery fluid to contact your skin, eyes, fabrics, or painted surfaces. After touching a bat-

tery or battery cap, immediately wash your hands thoroughly. If the battery fluid gets into your eyes, or

onto your skin or clothing, flush with water immediately for at least 15 minutes and seek medical atten-

tion. Battery fluid is acid. If the battery fluid gets into your eyes or onto your skin, it could cause loss of

your eyesight or burns.

O

5

Note operating instructions

Before handling the battery, read this instruction carefully to ensure correct and safe handling.

O

6

Explosive gas

Hydrogen gas generated by battery fluid is explosive. Explosive gases can cause blindness or injury.

BATTERY

8-12

Do-it-yourself

• If the battery is labeled "do not open" it is

maintenance free and battery fluid should
not be checked. It is recommended that you
visit an INFINITI retailer or a qualified spe-
cialist workshop to confirm the battery's
performance.

• Keep the battery surface clean and dry.

Clean the battery with a solution of baking
soda and water.

• Make certain the terminal connections are

clean and securely tightened.

• If the vehicle is not to be used for 30 days

or longer, disconnect the negative (-) bat-
tery terminal cable to prevent discharge.

NOTE:
Care should be taken to avoid situations
that can lead to potential battery dis-
charge and potential no-start conditions
such as:

1. Installation or extended use of electronic

accessories that consume battery power
when the engine is not running (Phone
chargers, GPS, DVD players, etc.)

2. Vehicle is not driven regularly and/or

only driven short distances.

In these cases, the battery may need to be
charged to maintain battery health.

WARNING

•

Do not expose the battery to flames, an
electrical spark or a cigarette. Hydrogen
gas generated by the battery is explo-
sive. Explosive gases can cause blindness
or injury. Do not allow battery fluid to
contact your skin, eyes, fabrics or
painted surfaces. Sulfuric acid can cause
blindness or injury. After touching a bat-
tery or battery cap, do not touch or rub
your eyes. Thoroughly wash your hands.
If the acid contacts your eyes, skin or
clothing, immediately flush with water
for at least 15 minutes and seek medical
attention.

•

When working on or near a battery, al-
ways wear suitable eye protection and
remove all jewelry.

•

Battery posts, terminals and related ac-
cessories contain lead and lead com-
pounds. Wash hands after handling.

•

Keep battery out of the reach of children.

•

Do not tip the battery.

NOTE:

Do not try to open the top of the battery.

This battery is not equipped with removable
vent caps.

Vehicles operated in high temperatures or
under severe conditions might present bat-
tery liquid loss. It is recommended that you
visit an INFINITI retailer for a proper battery
diagnosis and service in case of required.

LDI3229

Do-it-yourself

8-13

JUMP STARTING

If jump starting is necessary, see “Jump start-
ing” (P. 6-5). If the engine does not start by
jump starting, the battery may have to be
replaced. It is recommended that you visit an
INFINITI retailer for this service.

CAUTION

•

Do not ground accessories directly to the
battery terminal. Doing so will bypass
the variable voltage control system and
the vehicle battery may not charge
completely.

•

Use electrical accessories with the en-
gine running to avoid discharging the ve-
hicle battery.

NOTE:

If the battery is completely drained the
transmission will not manually shift to other
positions.

Your vehicle is equipped with a variable volt-
age control system. This system measures
the amount of electrical discharge from the
battery and controls voltage generated by
the generator.

The current sensor

O

A

is located near the

battery along the negative battery cable. If
you add electrical accessories to your vehicle,
be sure to ground them to a suitable body
ground such as the frame or engine block
area.

LDI3164

VARIABLE VOLTAGE CONTROL
SYSTEM

8-14

Do-it-yourself

1.

Automatic tensioner pulley

2.

Generator pulley

3.

Water pump pulley

4.

Air conditioner compressor pulley

5.

Crankshaft pulley

WARNING

Be sure the ignition switch is in the OFF or
LOCK position before servicing drive belt.
The engine could rotate unexpectedly.

1. Visually inspect the belt for signs of un-

usual wear, cuts, or fraying. If the belt is in
poor condition, have it replaced. It is rec-
ommended that you visit an INFINITI re-
tailer for this service.

2. Have the belt checked regularly for

condition.

REPLACING SPARK PLUGS
Iridium-tipped spark plugs

It is not necessary to replace iridium-tipped

O

A

spark plugs as frequently as conventional

type spark plugs because they last much lon-
ger. Follow the maintenance log shown in the
"Maintenance and schedules" section of this
manual. Do not service iridium-tipped spark
plugs by cleaning or regapping.
•

Always replace spark plugs with recom-
mended or equivalent ones.

WDI0638

SDI1895

DRIVE BELT

SPARK PLUGS

Do-it-yourself

8-15

WARNING

Be sure the engine and ignition switch are
off and that the parking brake is engaged
securely.

CAUTION

Be sure to use the correct socket to remove
the spark plugs. An incorrect socket can
damage the spark plugs.

If replacement is required, it is recommended
that you visit an INFINITI retailer for this
service.

WARNING

•

Operating the engine with the air cleaner
filter off can cause you or others to be
burned. The air cleaner filter not only
cleans the intake air, it also stops the
flame if the engine backfires. If the air
cleaner is not installed and the engine
backfires, you could be burned. Never
drive with the air cleaner filter off. Be
cautious working on the engine when the
air cleaner is off.

•

Never pour fuel into the throttle body or
attempt to start the engine with the air
cleaner removed. Doing so could result in
serious injury.

To remove the filter from the air cleaner, push
the clips

O

A

and pull the cover upward.

The viscous paper type filter element should
not be cleaned and reused. Replace it accord-
ing to the maintenance log shown in the
“Maintenance and schedules” section of this
manual.

When replacing the air filter, wipe the inside
of the air cleaner housing and the cover with
a damp cloth.

NOTE:
After installing a new air cleaner filter,
make sure the air cleaner cover is seated
in the housing and latch the clips

O

A

.

IN-CABIN MICROFILTER

The in-cabin microfilter restricts the entry of
airborne dust and pollen particles and re-
duces some objectionable outside odors. The
filter is located behind the glove box. For
additional information on change intervals,
see "Maintenance and schedules" (P. 9-2).

LDI3165

AIR CLEANER

8-16

Do-it-yourself

If replacement is required, it is recommended
that you visit an INFINITI retailer for this
service.

CLEANING

If your windshield is not clear after using the
windshield-washer or if a wiper blade chat-
ters when running, wax or other material may
be on the blade or windshield.

Clean the outside of the windshield with a
washer solution or a mild detergent. Your
windshield is clean if beads do not form when
rinsing with clear water.

Clean each blade by wiping it with a cloth
soaked in a washer solution or a mild deter-
gent. Then rinse the blades with clear water.
If your windshield is still not clear after clean-
ing the blades and using the wiper, replace
the blades.

CAUTION

Worn windshield wiper blades can damage
the windshield and impair driver vision.

REPLACING

Replace the wiper blades if they are worn.

To replace the windshield wiper blades, fol-
low the procedure below:

1. When the ignition switch is ON or within

60 seconds after placing the ignition
switch from the ON to OFF position,
place the windshield wiper and washer
lever into the OFF position.

2. Rapidly lift the windshield wiper and

washer lever

O

A

upwards twice within 0.5

seconds. This action will cause the wipers
to automatically take the service position.

LDI3250

WINDSHIELD WIPER BLADES

Do-it-yourself

8-17