differential INFINITI Q50 2021 Owner's Manual

.Replacing tires with those not origin-
ally specified by INFINITI could affect
the proper operation of the TPMS.
. The TPMS sensor may be damaged if
it is not handled correctly. Be careful
when handling the TPMS sensor.
. When replacing the TPMS sensor, the
ID registration may be required. It is
recommended you contact an
INFINITI retailer for ID registration.
. Do not use a valve stem cap that is
not specified by INFINITI. The valve
stem cap may become stuck.
. Be sure that the valve stem caps are
correctly fitted. Otherwise the valve
may be clogged up with dirt and
cause a malfunction or loss of pres-
sure.
. Do not install a damaged or deformed
wheel or tire even if it has been
repaired. Such wheels or tires could
have structural damage and could fail
without warning.
. The use of retread tire is not recom-
mended.
. For additional information regarding
tires, refer to “Important Tire Safety
Information” (US) or “Tire Safety
Information” (Canada) in the War- ranty Information Booklet.
Intelligent All-Wheel Drive (AWD)
models
CAUTION
.
Always use tires of the same type,
size, brand, construction (bias, bias-
belted or radial), and tread pattern
on all four wheels. Failure to do so
may result in a circumference differ-
ence between tires on the front and
rear axles which will cause excessive
tire wear and may damage the trans-
mission, transfer case and differential
gears.
. ONLY use spare tires specified for
the Intelligent AWD model.
If excessive tire wear is found, it is recom-
mended that all four tires be replaced with
tires of the same size, brand, construction
and tread pattern. The tire pressure and
wheel alignment should also be checked and
corrected as necessary. It is recommended
you visit an INFINITI retailer for this service.
Wheel balance
Unbalanced wheels may affect vehicle hand-
ling and tire life. Even with regular use,
wheels can get out of balance. Therefore,
they should be balanced as required.
Wheel balance service should be performed
with the wheels off the vehicle. Spin
balancing the wheels on the vehicle could
lead to mechanical damage.
For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada) in
the INFINITI Warranty Information Booklet.
Care of wheels
See “Cleaning exterior” (P.7-2) for details
about care of the wheels.
JACKING UP THE VEHICLE AND
REPLACING TIRES
Your vehicle is equipped with run-flat tires
and you can continue driving to a safe
location even if they are punctured. (See
“Run-flat tires” (P.6-4) and “Run-flat tires”
(P.8-32).)
This section contains the information about
the vehicle jack-up procedures and the tire
replacement.
Do-it-yourself8-37

8-38Do-it-yourself
NOTE:
Jacking tools are not equipped as standard
with this vehicle. It is recommended you
contact an INFINITI retailer about acquiring
the tools.
WARNING
.Make sure the parking brake is
securely applied and the transmission
into the P (Park) position.
. Never change tires when the vehicle
is on a slope, ice or slippery areas.
This is hazardous.
. Never change tires if oncoming traf-
fic is close to your vehicle. Wait for
professional road assistance.
MCE0001A
Blocking wheels
Place suitable blocksat both the front and
back of the wheel diagonally opposite the
flat tire to prevent the vehicle from moving
when it is jacked up.
WARNING
Be sure to block the wheel as the vehicle
may move and result in personal injury.
Jacking up the vehicle and removing
a tire
WARNING
. Never get under the vehicle while it is
supported only by the jack. If it is
necessary to work under the vehicle,
support it with safety stands.
. Use the correct jack-up points. Never
use any other part of the vehicle for
jack support.
. Never jack up the vehicle more than
necessary.
. Never use blocks on or under the jack.
. Do not start or run the engine while
vehicle is on the jack, as it may cause
the vehicle to move. This is especially
true for vehicles with limited slip
differentials.
. Do not allow passengers to stay in
the vehicle while it is on the jack.
Carefully read the caution label attached to
the jack body and the following instruc-
tions.

9-6Maintenance and schedules
Check for wear, deterioration and fluid
leaks. Replace any deteriorated or damaged
parts immediately.
Exhaust system:
Visually inspect the exhaust pipes, muffler
and hangers for leaks, cracks, deterioration,
and damage. Tighten connections or replace
parts as necessary.
In-cabin microfilter:
Replace at specified intervals. When driving
for prolonged periods in dusty conditions,
replace the filter more frequently.
Propeller shaft(s):
Check for damage, looseness, and grease
leakage. (4WD/AWD/RWD)
Steering gear and linkage, axle and suspen-
sion parts, drive shaft boots:
Check for damage, looseness, and leakage
of oil or grease. Under severe driving condi-
tions, inspect more frequently.
Tire rotation:
Rotate tires at the specified interval. When
rotating tires, check for damage and uneven
wear. Replace if necessary. If your vehicle is
equipped with different sized tires in the
front and rear, tires cannot be rotated.
Transmission fluid/oil, differential oil and
transfer case oil:
Visually inspect for signs of leakage atspecified intervals.
To help ensure smooth, safe and economical
driving, INFINITI provides two maintenance
schedules that may be used, depending upon
the conditions in which you usually drive.
These schedules contain both distance and
time intervals, up to 120,000 miles
(192,000 km)/144 months. For most peo-
ple, the odometer reading will indicate when
service is needed. However, if you drive very
little, your vehicle should be serviced at the
regular time intervals shown in the schedule.
After 120,000 miles (192,000 km)/144
months, continue maintenance at the same
mileage/time intervals.
ADDITIONAL MAINTENANCE
ITEMS FOR SEVERE OPERATING
CONDITIONS
Additional maintenance items for severe
operating conditions;
should be performed
on vehicles that are driven under especially
demanding conditions. Additional mainte-
nance items should be performed if you
primarily operate your vehicle under the
following conditions:
. Repeated short trips of less than 5 miles
(8 km).
. Repeated short trips of less than 10 miles
(16 km) with outside temperatures re-
maining below freezing.
MAINTENANCE SCHEDULES

9-8Maintenance and schedules
The following shows the maintenance schedule.
Choose the maintenance schedule needed based on your vehicle driving conditions.
After 120,000 miles (192,000 km)/144 months, continue maintenance at the same mileage/time interval.
5,000 Miles/6 Months/8,000 KmStandard maintenance:.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
10,000 Miles/12 Months/16,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect stop lamp switch and brake pedal
position switch (1)
.Inspect transfer fluid (2).Inspect differential gear oil (2).Replace engine oil and filter (3).Perform tire rotation (4) Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Replace brake fluid
(1) Inspect the clearance between the brake pedal
and the switches.
(2) If using a car-top carrier, or driving on rough or
muddy roads, change (not just inspect) oil at every
20,000 miles (32,000 km) or 24 months.
(3) If the oil replacement indicator is displayed,
change the engine oil and filter as soon as
possible. After replacing the engine oil, reset the
display.
(4) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
STANDARD MAINTENANCE

15,000 Miles/18 Months/24,000
Km
Standard maintenance:.Inspect Intelligent Key battery.Replace In-cabin microfilter.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
20,000 Miles/24 Months/32,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect EVAP vapor lines and fuel lines.Inspect exhaust system.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect stop lamp switch and brake pedal
position switch (1)
.Inspect transfer fluid.Inspect differential gear oil.Replace brake fluid.Replace engine oil and filter (2).Perform tire rotation (3) Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Replace brake fluid.Replace transfer fluid.Replace differential gear oil
(1) Inspect the clearance between the brake pedal
and the switches.
(2) If the oil replacement indicator is displayed,
change the engine oil and filter as soon as
possible. After replacing the engine oil, reset the
display.
(3) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
Maintenance and schedules9-9

9-10Maintenance and schedules
25,000 Miles/30 Months/40,000
Km
Standard maintenance:.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
30,000 Miles/36 Months/48,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect stop lamp switch and brake pedal
position switch (1)
.Inspect transfer fluid.Inspect differential gear oil.Replace air cleaner filter (2).Replace engine oil and filter (3).Replace In-cabin microfilter.Replace Intelligent Key battery.Perform tire rotation (4) Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Replace brake fluid
(1) Inspect the clearance between the brake pedal
and the switches.
(2) If operating mainly in dusty conditions, more
frequent maintenance may be required.
(3) If the oil replacement indicator is displayed,
change the engine oil and filter as soon as
possible. After replacing the engine oil, reset the
display.
(4) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.

35,000 Miles/42 Months/56,000
Km
Standard maintenance:.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
40,000 Miles/48 Months/64,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect drive belts (1).Inspect EVAP vapor lines and fuel lines.Inspect exhaust system.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect stop lamp switch and brake pedal
position switch (2)
.Inspect transfer fluid.Inspect differential gear oil.Replace brake fluid.Replace engine oil and filter (3).Perform tire rotation (4) Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Replace brake fluid.Replace transfer fluid.Replace differential gear oil
(1) Replace the drive belts if found damaged.
(2) Inspect the clearance between the brake pedal
and the switches.
(3) If the oil replacement indicator is displayed,
change the engine oil and filter as soon as
possible. After replacing the engine oil, reset the
display.
(4) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
Maintenance and schedules9-11

9-12Maintenance and schedules
45,000 Miles/54 Months/72,000
Km
Standard maintenance:.Replace In-cabin microfilter.Replace Intelligent Key battery.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
50,000 Miles/60 Months/80,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect drive belts (1).Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect stop lamp switch and brake pedal
position switch (2)
.Inspect transfer fluid.Inspect differential gear oil.Replace engine oil and filter (3).Perform tire rotation (4)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Replace brake fluid
(1) Replace the drive belts if found damaged.
(2) Inspect the clearance between the brake pedal
and the switches.
(3) If the oil replacement indicator is displayed,
change the engine oil and filter as soon as
possible. After replacing the engine oil, reset the
display.
(4) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
55,000 Miles/66 Months/88,000
Km
Standard maintenance:.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.

60,000 Miles/72 Months/96,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect drive belts (1).Inspect EVAP vapor lines and fuel lines.Inspect exhaust system.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect stop lamp switch and brake pedal
position switch (2)
.Inspect transfer fluid.Inspect differential gear oil.Replace air cleaner filter (3).Replace brake fluid.Replace engine oil and filter (4).Replace In-cabin microfilter.Replace Intelligent Key battery.Perform tire rotation (5)Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Replace brake fluid.Replace transfer fluid.Replace differential gear oil
(1) Replace the drive belts if found damaged.
(2) Inspect the clearance between the brake pedal
and the switches.
(3) If operating mainly in dusty conditions, more
frequent maintenance may be required.
(4) If the oil replacement indicator is displayed,
change the engine oil and filter within two weeks
or less than 500 miles (800 km).
(5) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
65,000 Miles/78 Months/104,000
Km
Standard maintenance:.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
Maintenance and schedules9-13

9-14Maintenance and schedules
70,000 Miles/84 Months/112,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect drive belts (1).Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect stop lamp switch and brake pedal
position switch (2)
.Inspect transfer fluid.Inspect differential gear oil.Replace engine oil and filter (3).Perform tire rotation (4)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Replace brake fluid
(1) Replace the drive belts if found damaged.
(2) Inspect the clearance between the brake pedal
and the switches.
(3) If the oil replacement indicator is displayed,
change the engine oil and filter as soon as
possible. After replacing the engine oil, reset the
display.
(4) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
75,000 Miles/90 Months/120,000
Km
Standard maintenance:.Replace In-cabin microfilter.Replace Intelligent Key battery.Perform tire rotation (1)
Severe maintenance:
.Inspect brake pads and rotors.Inspect exhaust system.Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models)
(1) If your vehicle is equipped with different sized
tires in the front and rear, tires cannot be rotated.
80,000 Miles/96 Months/128,000
Km
Standard maintenance:.Inspect brake lines and cables.Inspect brake pads and rotors.Inspect drive belts (1).Inspect EVAP vapor lines and fuel lines.Inspect exhaust system.Inspect propeller shaft (AWD models).Inspect drive shaft boots (AWD models).Inspect steering gear and linkage.Inspect axle and suspension parts.Inspect stop lamp switch and brake pedal
position switch (2)
.Inspect transfer fluid.Inspect differential gear oil.Replace brake fluid.Replace engine oil and filter (3).Perform tire rotation (4)