2019 INFINITI QX50 coolant replacement

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 ...........................8-7
Changing engine oil filter ..................... 8-8
Continuously Variable Transmission (CVT) fluid ....8-9
Brake fluid ..................................... 8-10
Windshield-washer fluid ........................ 8-10
Windshield-washer fluid reservoir ............8-10
Battery ......................................... 8-11
Jump starting ............................... 8-12
Variable voltage control system .................8-13
Drive belt ...................................... 8-13
Spark plugs .................................... 8-14
Replacing spark plugs ....................... 8-14
Air cleaner ..................................... 8-15In-cabin microfilter
.......................... 8-15
Windshield wiper blades ........................ 8-16
Cleaning .................................... 8-16
Replacing ................................... 8-16
Brakes ......................................... 8-18
Fuses .......................................... 8-19
Engine compartment ........................ 8-19
Passenger compartment .....................8-20
Battery replacement ............................ 8-21
INFINITI Intelligent Key ......................8-22
Lights ......................................... 8-23
Headlights .................................. 8-23
Fog lights (if so equipped) ...................8-23
Exterior and interior lights ...................8-24
Wheels and tires ............................... 8-26
Tire pressure ................................ 8-26
Tire labeling ................................. 8-30
Types of tires ............................... 8-32
Tire chains .................................. 8-35
Changing wheels

and tires................... 8-36

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, applythe 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 running, 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 theengine 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.
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, refer to
“Owner’s Manual/Service Manual order in-
formation” in the “Technical and consumer
information” section of this manual.
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
8-2Do-it-yourself

MAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. Miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
48.75 (78)78 52.5
(84) 84 56.25
(90)90 60
(96) 96 63.75
(102) 102 67.5
(108) 108 71.25
(114) 114 75
(120) 120 78.75
(126) 126 82.5
(132) 132 86.25
(138) 138 90
(144) 144
Drive belt See NOTE (1)I*I*I*I*I*I*
Air cleaner filter See NOTE (2)R R
EVAP vapor lines I*I*I*
Fuel lines I*I*I*
Fuel filter See NOTE (3)
Engine coolant* See NOTE (4)(5)
Engine oil See NOTE (6)RRRRRR
Engine oil filter See NOTE (6)RRRRRR
Spark plugs See NOTE (7)Replace every 105,000 miles (168,000 km)
Intake and exhaust valve clearances* See NOTE (8)
NOTE:
(1) After 30,000 miles (48,000 km) or 48 months, inspect every 7,500 miles (12,000 km) or 12 months. Replace the drive belts if found
damaged.
(2) If operating mainly in dusty conditions, more frequent maintenance may be required.
(3) Periodic maintenance is not required.
(4) First replacement interval is 105,000 miles (168,000 km) or 84 months. After first replacement, replace every 75,000 miles
(120,000 km) or 60 months.
(5) Use only Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent with proper mixture ratio of 50% antifreeze and 50%
demineralized or distilled water. Mixing any other type of coolant or the use of non-distilled water may reduce the life expectancy of the
factory fill coolant.
(6) If the oil replacement indicator is displayed, change the engine oil and filter within two weeks or less than 500 miles (800 km)
(7) Replace spark plug when the plug gap exceeds 0.045 in (1.15 mm) even if within specified periodic replacement mileage.
(8) Periodic maintenance is not required. However, if valve noise increased, inspect valve clearance.
* Maintenance items and intervals with “*” are recommended by INFINITI for reliable vehicle operation. The owner need not perform such
maintenance in order to maintain the emission warranty or manufacturer recall liability. Other maintenance items and intervals are required.
9-10Maintenance and schedules

Front-door pocket...............2-55
Front power seat adjustment .........1-3
Frontseats....................1-2
Fuel Capacities and recommended
fuel/lubricants...............10-2
Fuel economy ...............5-172
Fuel-filler door and cap ..........3-31
Fuel gauge ..................2-7
Fueloctanerating.............10-5
Fuel recommendation ...........10-3
Loose fuel cap warning ..........2-26
Fuel efficient driving tips ..........5-171
Fuel-filler door .................3-31
Fuel gauge ....................2-7
Fuses ......................8-19
Fusiblelinks ..................8-20
G
Garage door opener, HomeLink® Universal
Transceiver...........2-72,2-73,2-74, 2-75, 2-75, 2-76
Gascap.....................3-31
Gauge Engine coolant temperature gauge ....2-6
Fuel gauge ..................2-7
Odometer ...................2-5
Speedometer ..............2-4,2-5
Tachometer .................2-6
Trip odometer .............2-4,2-5
General maintenance ..............9-2
Glovebox....................2-57
Gloveboxlock.................2-57
Grocery hooks .................2-61 H
Hazard warning flasher switch ........6-2
Headlight aiming control ...........2-44
Headlight and turn signal switch ......2-39
Headlights ...................8-23
Headlights, aiming control ..........2-44
Headlight switch ................2-39
Head restraints ..................1-7
Heated seats ..................2-48
Heater Heater and air conditioner (automatic)
(if so equipped) ...............4-36
Heater and air conditioner controls . . .4-37
Heater operation .............4-38
Heater and air conditioner (automatic) . . .4-36
Heater and air conditioner settings .....4-43
Hill start assist system ............5-186
HomeLink® Universal
Transceiver...........2-72,2-73,2-74, 2-75, 2-75, 2-76
Hood ......................3-24
Hook Luggage hook ...............2-60
Horn.......................2-46
I
Ignition switch Push-button ignition switch .......5-13
Immobilizer system ..............5-17
Important vehicle information label ....10-11
In-cabin microfilter ..............8-15
Increasing fuel economy ..........5-172Indicator lights and audible reminders
(See warning/indicator lights and audible
reminders)
.............2-9,2-10,2-15
INFINITI Drive Mode Selector ........5-29
INFINITI Intelligent Key System .....3-2, 3-7
INFINITI InTouch™ Owner's Manual .....4-2
INFINITI Vehicle Immobilizer
System ...............
2-
33,3-4,5-17
Inside automatic anti-glare mirror .....3-36
Instrument brightness control ........2-45
Instrument panel .............0-6,2-2
Instrument panel dimmer switch ......2-45
Intelligent All-Wheel Drive (AWD) .....5-172
Intelligent Cruise Control (ICC)
(for vehicles without ProPILOT Assist) . .5-84
Intelligent Key system Key operating range ............3-9
Keyoperation................3-11
Mechanical key ...............3-3
Remote keyless entry operation .....3-15
Troubleshooting guide ..........3-18
Warningsignals..............3-18
Interiorlight...................2-71
ISOFIX child restraints ............1-24
J
Jump starting ............... 6-5, 8-12
K
Key.........................3-2
Key fob battery replacement .........8-21
11-3

Seats/floor mats................7-5
Security indicator light ............2-17
Security system (INFINITI vehicle immobilizer system),
engine start ..........2-33,3-4,5-17
Security systems Vehicle security system ..........2-32
Self-adjusting brakes .............8-18
Service manual order form .........10-33
Servicing air conditioner ...........4-43
Spark plug replacement ............8-14
Spark plugs ...................8-14
Specifications .................10-8
Speedometer ................2-4,2-5
Speedometer and odometer ..........2-4
SRS warning label ...............1-62
Stability control ................5-181
Standard maintenance .............9-9
Starting Before starting the engine ........5-17
Jump starting .............6-5,8-12
Precautions when starting and
driving .................5-4,5-11
Push starting .................6-7
Starting the engine ............5-17
Starting the engine ..............5-17
Steering Power steering system .....5-176, 5-176
Steering wheel .................3-34
Stoplight....................8-24
Storage.....................2-55
Storagebin...................2-60
Storagetray ..................2-56
Sunglasses case ................2-57
Sunglasses holder ...............2-57
Sunroof ......................7-5 Sun visors
....................3-35
Supplemental air bag warning labels ....1-62
Supplemental air bag warning
light....................1-62,2-15
Supplemental front impact air bag
system......................1-50
Supplemental restraint system Informationandwarninglabels.....1-62
Precautions on supplemental restraint
system ....................1-43
Supplemental restraint system
(Supplemental air bag system) ........1-43
Switch Autolight switch ..............2-40
Automatic power window switch ....2-67
Fog light switch ..............2-46
Hazard warning flasher switch ......6-2
Headlight aiming control .........2-44
Headlight and turn signal switch ....2-39
Instrument brightness control ......2-45
Power door lock switch ..........3-6
Rear window and outside mirror defroster
switch....................2-39
Rear window wiper and washer
switches ...................2-37
Turn signal switch .............2-45
T
Tachometer ...................2-6
Temperature gauge Engine coolant temperature gauge ....2-6
Theft (INFINITI vehicle immobilizer system),
engine start ..........2-33,3-4,5-17 Three-way catalyst
...............5-4
Tire Flat tire ....................6-3
Tire and Loading Information label . .10-12
Tire chains ................. 8

-35
Tirepressure................8-26
Tirerotation ................8-36
Types of tires ................8-32
Uniform tire quality grading ......10-29
Wheels and tires .............. 8-26
Wheel/tire size ...............10-9
Tire pressure Low tire pressure warning light .....2-12
Tire Pressure Monitoring System (TPMS) . .5-5
Top tether strap child restraint .......1-26
Towing 4-wheel drive models ...........6-10
Flattowing................10-28
Towing load/specification .......10-22
Towtrucktowing..............6-8
Trailertowing...............10-18
Towing a trailer ...............10-18
Transceiver HomeLink® Universal
Transceiver......... 2-72, 2-73, 2-74,
2-75, 2-75, 2-76
Transmission Continuously Variable Transmission (CVT)
fluid......................8-9
Driving with Continuously Variable
Transmission (CVT) ............5-19
Travel (See registering a vehicle in another
country) ....................10-10
Trip odometer ...............2-4,2-5
Trunklight.................... 2-72
Turn signal switch ............... 2-45
11-6