tire type INFINITI QX50 2023 User Guide

8 Do-it-yourself
Maintenance precautions........................8-2
Engine compartment check locations .............8-3
Engine cooling system .......................... 8-4
Checking engine coolant level .................8-5
Changing engine coolant ......................8-5
Engine oil ........................................8-6
Checking engine oil level .......................8-6
Changing engine oil and oil filter ...............8-7
Continuously Variable Transmission (CVT) fluid . . . 8-10
Brake fluid..................................... 8-10
Windshield-washer fluid ......................... 8-11
Windshield-washer fluid reservoir .............8-11
Battery ........................................ 8-12
Jump starting ............................... 8-14
Variable voltage control system ................8-14
Drive belt ...................................... 8-15
Spark plugs .................................... 8-15
Replacing spark plugs ....................... 8-15
Air cleaner ..................................... 8-16
In-cabin microfilter .......................... 8-17Windshield wiper blades
........................ 8-17
Cleaning .................................... 8-17
Replacing ................................... 8-17
Brakes ......................................... 8-19
Fuses .......................................... 8-20
Engine compartment ........................ 8-20
Passenger compartment ....................8-21
Battery replacement ........................... 8-22
INFINITI Intelligent Key .....................8-22
Lights ......................................... 8-24
Headlights .................................. 8-24
Fog lights (if so equipped) ...................8-24
Exterior and interior lights ...................8-25
Replacement procedures ....................8-26
Wheels and tires ............................... 8-27
Tire pressure ................................ 8-27
Tire labeling ................................ 8-32
Types of tires ............................... 8-35
Tire chains .................................. 8-38
Changing wheels and tires ...................8-38

6. Two- or three-digit number (95):This number is the tire's load index.
It is a measurement of how much
weight each tire can support.
7. H: Tire speed rating. You should not drive the vehicle faster than the tire
speed rating.
O2TIN (Tire Identification Number)
for a new tire (example: DOT XX XX
XXX XXXX)
1. DOT: Abbreviation for the “Depart- ment Of Transportation”. The sym-
bol can be placed above, below or
to the left or right of the Tire Iden-
tification Number.
2. Two-digit code: Manufacturer's identification mark. 3. Two-digit code: Tire size.
4. Three-digit code: Tire type code
(Optional).
5. Four numbers represent the week and year the tire was built. For ex-
ample, the numbers 3103 means
the 31st week of 2003. If these
numbers are missing then look on
the other sidewall of the tire.
LDI2786
Example (Type A) (if so equipped)
Do-it-yourself8-33

O2TIN (Tire Identification Number)
for a new tire (example: DOT XXX
XXXXXX XXXX)
1. DOT: Abbreviation for the “Depart- ment Of Transportation”. The sym-
bol can be placed above, below or
to the left of the Tire Identification
Number.
2. Three-digit code: Manufacturer's identification mark. 3. Six-digit code: Descriptive code
used to identify significant charac-
teristics of the tire.
4. Four numbers represent the week and year the tire was built. For ex-
ample, the numbers 3103 means
the 31st week of 2003.
O3Tire ply composition and material
The number of layers or plies of
rubber-coated fabric in the tire. Tire manufacturers also must indicate the
materials in the tire, which include
steel, nylon, polyester and others.
O4Maximum permissible inflation
pressure
This number is the greatest amount of
air pressure that should be put in the
tire. Do not exceed the maximum per-
missible inflation pressure.
O5Maximum load rating
This number indicates the maximum
load in kilograms and pounds that can
be carried by the tire. When replacing
the tires on the vehicle, always use a
tire that has the same load rating as
the factory installed tire.
O6Term of “tubeless” or “tube type”
Indicates whether the tire requires an
inner tube (“tube type”) or not
(“tubeless”).
LDI3639
Example (Type B) (if so equipped)
8-34Do-it-yourself

O7The word “radial”
The word “radial” is shown if the tire
has radial structure.
O8Manufacturer or brand name
Manufacturer or brand name is
shown.
Other Tire-related Terminology
In addition to the many terms that are
defined throughout this section, In-
tended Outboard Sidewall is (1) the
sidewall that contains a whitewall,
bears white lettering or bears manu-
facturer, brand, and/or model name
molding that is higher or deeper than
the same molding on the other side-
wall of the tire, or (2) the outward
facing sidewall of an asymmetrical tire
that has a particular side that must
always face outward when mounted
on a vehicle.
TYPES OF TIRES
WARNING
• When changing or replacing tires, be sure
all four tires are of the same type (i.e.,
Summer, All Season or Snow) and con-
struction. An INFINITI retailer may be
able to help you with information about
tire type, size, speed rating and
availability.
• Replacement tires may have a lower
speed rating than the factory equipped
tires, and may not match the potential
maximum vehicle speed. Never exceed
the maximum speed rating of the tire.
• Replacing tires with those not originally
specified by INFINITI could affect the
proper operation of the low tire pressure
warning system.
• Always use tires of the same type, size,
brand, construction and tread pattern on
all four wheels. Failure to do so may re-
sult in a circumference difference be-
tween tires on the front and rear axles
which can cause the Vehicle Dynamic
Control (VDC) system to malfunction re-
sulting in personal injury or death, exces-
sive tire wear and may damage the
transmission, transfer case and differen-
tial gears. •
For additional information regarding
tires, refer to “Important Tire Safety In-
formation” (US) or “Tire Safety Informa-
tion” (Canada) in the Warranty Informa-
tion Booklet.
All-Wheel Drive (AWD) models
CAUTION
• ONLY use spare tires specified for the
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
that you visit an INFINITI retailer for this
service.
All season tires
INFINITI specifies All Season tires on some
models to provide good performance all year,
including snowy and icy road conditions. All
Season tires are identified by ALL SEASON
and/or M&S on the tire sidewall. Snow tires
have better snow traction than All Season
tires and may be more appropriate in some
areas.
Do-it-yourself8-35

If the low tire pressure warning light illumi-
nates continuously and the “Flat Tire – Visit
dealer" warning appears in the vehicle infor-
mation display:
• Do not exceed 50 mph (80 km/h).
• Increase your following distance to allowfor increased stopping distances.
• Avoid sudden maneuvers, hard cornering and hard braking.
WARNING
• Although you can continue driving with a
punctured run-flat tire, remember that
vehicle handling stability is reduced,
which could lead to an accident and per-
sonal injury. Also, driving a long distance
at high speeds may damage the tire.
• Do not drive at speeds above 50 mph (80
km/h) and do not drive more than ap-
proximately 93 miles (150 km) with a
punctured run-flat tire. The actual dis-
tance the vehicle can be driven on a flat
tire depends on outside temperature, ve-
hicle load, road conditions and other
factors. •
Drive safely at reduced speeds. Avoid
hard cornering or braking, which may
cause you to lose control of the vehicle.
• If you detect any unusual sounds or vi-
brations while driving with a punctured
run-flat tire, pull off the road to a safe
location and stop the vehicle as soon as
possible. The tire may be seriously dam-
aged and need to be replaced.CAUTION
• Never install tire chains on a punctured
run-flat tire, as this could damage your
vehicle.
• Avoid driving over any projection or pot-
hole, as the clearance between the ve-
hicle and the ground is smaller than
normal.
• Do not enter an automated car wash
with a punctured run-flat tire.
• Have the punctured tire inspected by an
INFINITI retailer or other authorized re-
pair shop. Replace the tire as soon as
possible if the tire is seriously damaged. •
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 difference between tires
on the front and rear axles which will
cause excessive tire wear and may dam-
age the transmission, transfer case and
differential gears (AWD models).
• ONLY use spare tires specified for the
AWD model.
• If excessive tire wear is found, it is rec-
ommended that all four tires be replaced
with tires of the same size, brand, con-
struction and tread pattern. The tire
pressure and wheel alignment should
also be checked and corrected as neces-
sary. It is recommended that you visit an
INFINITI retailer for this service.
Do-it-yourself8-37

TIRE CHAINS
CAUTION
Tire chains/cables should not be installed
on P255/45RF20 size tires. Installation of
the tire chains/cables on P255/45RF20
size tires will cause damage to the vehicle.
If you plan to use tire chains/cables, you
should install P235/55RF19 size tires on
your vehicle.
Use of tire chains may be prohibited accord-
ing to location. Check the local laws before
installing tire chains. When installing tire
chains, make sure they are the proper size for
the tires on your vehicle and are installed
according to the chain manufacturer's sug-
gestions. Use only SAE class “S” chains. Class
“S” chains are used on vehicles with restricted
tire to vehicle clearance. Vehicles that can use
Class “S” chains are designed to meet the
minimum clearances between the tire and the
closest vehicle suspension or body compo-
nent required to accommodate the use of a
winter traction device (tire chains or cables).
The minimum clearances are determined
using the factory equipped tire size. Other
types may damage your vehicle. Use chain
tensioners when recommended by the tire
chain manufacturer to ensure a tight fit. Loose end links of the tire chain must be
secured or removed to prevent the possibility
of whipping action damage to the fenders or
underbody. If possible, avoid fully loading
your vehicle when using tire chains. In addi-
tion, drive at a reduced speed. Otherwise,
your vehicle may be damaged and/or vehicle
handling and performance may be adversely
affected.
Do not use tire chains on dry roads. Driving
with chains in such conditions can cause
damage to the various mechanisms of the
vehicle due to some overstress.
CHANGING WHEELS AND TIRES
Tire rotation
INFINITI recommends rotating the
tires every 7,500 miles (12,000 km).
For additional information on tire re-
placing procedures, see “Flat tire”
(P. 6-3).
As soon as possible, tighten the wheel
nuts to the specified torque with a
torque wrench.
WDI0258
8-38Do-it-yourself

equivalent with the proper mixture. (For ad-
ditional information on the proper mixture for
your area, see “Engine cooling system”
(P. 8-4).)
NOTE: Mixing any other type of coolant or
the use of non-distilled water may reduce
the recommended service interval of the
coolant.
Engine oil and oil filter:Replace engine oil
and oil filter at the specified intervals. For
recommended oil grade and viscosity, see
“Recommended fluids/lubricants and capaci-
ties” (P. 10-2).
Engine valve clearance*: Inspect only if valve
noise increases. Adjust valve clearance if
necessary.
Evaporative emissions control vapor lines*:Check vapor lines for leaks or looseness.
Tighten connections or replace parts as
necessary.
Fuel lines/connections*: Check the fuel
hoses, piping and connections for leaks,
looseness, or deterioration. Tighten connec-
tions or replace parts as necessary.
Spark plugs: Replace at specified intervals.
Install new plugs of the same type as origi-
nally equipped.
CHASSIS AND BODY
MAINTENANCE:
Brake lines and cables: Visually inspect for
proper installation. Check for chafing, cracks,
deterioration, and signs of leaking. Replace
any deteriorated or damaged parts
immediately.
Brake pads and rotors: Check for wear, de-
terioration and fluid leaks. Replace any dete-
riorated or damaged parts immediately.
Exhaust system: Visually inspect the exhaust
pipes, muffler and hangers for leaks, cracks,
deterioration, and damage. Tighten connec-
tions or replace parts as necessary.
In-cabin microfilter: Replace at specified in-
tervals. When driving for prolonged periods in
dusty conditions, replace the filter more
frequently.
Propeller shaft(s): Check for damage, loose-
ness, and grease leakage. (AWD)
Steering gear and linkage, axle and suspen-
sion parts, drive shaft boots: Check for dam-
age, looseness, and leakage of oil or grease.
Under severe driving conditions, inspect more
frequently. Tire rotation:
Rotate tires at the specified
interval shown in the maintenance schedule.
When rotating tires, check for damage and
uneven wear. Replace if necessary.
Transmission fluid/oil, differential oil and
transfer case oil: Visually inspect for signs of
leakage at specified intervals.
Replace at specified intervals.
9-6Maintenance and schedules

WHEELS AND TIRES
Wheel typeOffset
Metric
MeasureOffset
US
Measure
Size
Aluminum 39 mm 1.54 in 19 x 7.5J
Aluminum 44 mm 1.73 in 20 x 8.5J
Tire size P235/55RF19
P255/45RF20
Spare tire Not equipped
DIMENSIONS AND WEIGHTS
Metric
MeasureUS
Measure
Overall length 4,693 mm 184.8 in
Overall width 1,903 mm 74.9 in
Overall height 1,679 mm 66.1 in
Front track 19 inch wheel 1,635 mm 64.4 in
20 inch wheel 1,625 mm 64.0 in
Rear track 19 inch wheel 1,630 mm 64.2 in
20 inch wheel 1,620 mm 63.8 in
Wheelbase 2,800 mm 110.2 in
Gross vehicle weight rating Refer to the “F.M.V.S.S./
C.M.V.S.S. certi-
fication label” on
the center pillar
between the driver's
side front and rear
doors.
Gross axle weight rating
Front
Rear
10-10Technical and consumer information

5. Determine the combined weight ofluggage and cargo being loaded on
the vehicle. That weight may not
safely exceed the available cargo
and luggage load capacity calcu-
lated in step 4.
6. If your vehicle will be towing a trailer, load from your trailer will be
transferred to your vehicle. Consult
this manual to determine how this
reduces the available cargo and
luggage load capacity of your
vehicle.
Before driving a loaded vehicle, con-
firm that you do not exceed the GVWR
or the GAWR for your vehicle. For ad-
ditional information, see “Measure-
ment of weights” (P. 10-21).
Also check tires for proper inflation
pressures. For additional information,
see “Tire and Loading Information la-
bel” (P. 8-29).
SECURING THE LOAD
There are luggage hooks located in the cargo
area as shown. The hooks can be used to
secure cargo with ropes or other types of
straps.
When securing items using luggage hooks
located on the side finisher do not apply a
load over more than 6.5 lbs. (29 N) to a single
hook. The luggage hooks that are located on the
floor should have loads less than 110 lbs.
(490 N) to a single hook.
WARNING
• Properly secure all cargo with ropes or
straps to help prevent it from sliding or
shifting. Do not place cargo higher than
the seatbacks. In a sudden stop or colli-
sion, unsecured cargo could cause per-
sonal injury.
• The child restraint top tether strap may
be damaged by contact with items in the
cargo area. Secure any items in the cargo
area. Your child could be seriously injured
or killed in a collision if the top tether
strap is damaged.
• Do not load your vehicle any heavier than
the GVWR or the maximum front and
rear GAWRs. If you do, parts of your ve-
hicle can break, tire damage could occur,
or it can change the way your vehicle
handles. This could result in loss of con-
trol and cause personal injury.
LTI2331
Cargo area luggage hooks
10-20Technical and consumer information

Trailer lights
CAUTION
When splicing into the vehicle electrical
system, a commercially available power-
type module/converter must be used to
provide power for all trailer lighting. This
unit uses the vehicle battery as a direct
power source for all trailer lights while us-
ing the vehicle tail light, stop light and turn
signal circuits as a signal source. The
module/converter must draw no more
than 15 milliamps from the stop and tail
lamp circuits. Using a module/converter
that exceeds these power requirements
may damage the vehicle's electrical sys-
tem. See a reputable trailer retailer to ob-
tain the proper equipment and to have it
installed.
Trailer lights should comply with federal
and/or local regulations. For assistance in
hooking up trailer lights, contact an INFINITI
retailer or reputable trailer retailer. Vehicles
equipped with the optional trailer tow pack-
age are equipped with a 7-pin trailer harness
connector. If your trailer is equipped with a
flat 4-pin connector, an adapter will be
needed to connect the trailer lights to the
vehicle. Adapters are available at auto parts
stores and hitch retailers.
Trailer brakes
Most states require a separate braking sys-
tem on trailers with a loaded weight above a
specific amount, make sure the trailer meets
the local regulations and the regulations
where you plan to tow.
Several types of braking systems are
available.
Surge Brakes - The surge brake actuator is
mounted on the trailer tongue with a hydrau-
lic line running to each trailer wheel. Surge
brakes are activated by the trailer pushing
against the hitch ball when the tow vehicle is
braking. Hydraulic surge brakes are common
on rental trailers and some boat trailers. In
this type of system, there is no hydraulic or
electric connection for brake operation be-
tween the tow vehicle and the trailer.
Electric Trailer Brakes - Electric braking sys-
tems are activated by an electronic signal
sent from a trailer brake controller (special
brake-sensing module).
Have a professional supplier of towing
equipment make sure the trailer brakes are
properly installed and demonstrate proper
brake function testing.
WARNING
Never connect a trailer brake system di-
rectly to the vehicle brake system.
Pre-towing tips
• Be certain your vehicle maintains a level position when a loaded and/or unloaded
trailer is hitched. Do not drive the vehicle if
it has an abnormal nose-up or nose-down
condition; check for improper tongue load,
overload, worn suspension or other pos-
sible causes of either condition.
• Always secure items in the trailer to prevent load shift while driving.
• Keep the cargo load as low as possible in the trailer to keep the trailer center of grav-
ity low.
• Load the trailer so approximately 60% of the trailer load is in the front half and 40%
is in the back half. Also make sure the load is
balanced side to side.
• Check your hitch, trailer tire pressure, ve- hicle tire pressure, trailer light operation,
and trailer wheel lug nuts every time you
attach a trailer to the vehicle.
• Be certain your rearview mirrors conform to all federal, state or local regulations. If
not, install any mirrors required for towing
before driving the vehicle.
Technical and consumer information10-29