ad blue INFINITI QX50 2021 User Guide

speed control mode) is active (no ve-
hicle detected ahead). Your vehicle
maintains the driver-selected set speed.
– Speed control status indicator/warning (solid yellow
): ICC malfunction
TURNING THE CONVENTIONAL
(fixed speed) CRUISE CONTROL
MODE ON
NOTE:
ProPILOT Assist provides no approach
warnings, automatic braking, or steering as-
sist in the conventional (fixed speed) cruise
control mode.
To choose the conventional (fixed speed)
cruise control mode, push and hold the Pro-
PILOT Assist switch for longer than approxi-
mately 1.5 seconds. For additional informa-
tion, see “Conventional (fixed speed) cruise
control mode” (P. 5-103).
OPERATING PROPILOT ASSIST
1. Push the ProPILOT Assist switchOA. This
turns on the ProPILOT Assist system and
displays the status of the ProPILOT Assist
system on the vehicle information display
OB.
2. Accelerate or decelerate your vehicle to the desired speed. 3.
Push the SET- switchOC. The ProPILOT
Assist system begins to automatically
maintain the set speed. The ProPILOT As-
sist activation indicator
ODand ProPILOT
Assist status indicator
OEilluminate (blue).
When a vehicle ahead is traveling at a speed
of 20 mph (30 km/h) or below and the
SET- switch is pushed, the set speed of
your vehicle is 20 mph (30 km/h).
NOTE:
Turning the ProPILOT Assist system on will
turn on the Lane Departure Prevention system
at the same time. For additional information,
see “Lane Departure Prevention” (P. 5-40).
LSD3615LSD3616
5-82Starting and driving

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
8-4Do-it-yourself

CHECKING ENGINE COOLANT
LEVEL
Check the coolant levelin the reservoir when
the engine is cold. If the coolant level is below
the MIN level
OB, add coolant to the MAX
level
OA.
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-yourself8-5

NOTE:
INFINITI does not advocate the use of non-
OEM approved aftermarket flushing sys-
tems and strongly advises against perform-
ing these services on an INFINITI product.
Many of the aftermarket flushing systems
use non-OEM approved chemicals or sol-
vents, the use of which has not been vali-
dated by INFINITI.
For recommended fuel, lubricants, fluids,
grease, and refrigerant, see “Recommended
fluids/lubricants and capacities” (P. 10-2).
EMISSION CONTROL SYSTEM
MAINTENANCE:
Drive belt*:Check engine drive belt for wear,
fraying or cracking and for proper tension.
Replace any damaged drive belt.
Engine air filter: Replace at specified inter-
vals. When driving for prolonged periods in
dusty conditions, check/replace the filter
more frequently.
Engine coolant*: Replace coolant at the
specified interval. When adding or replacing
coolant, be sure to use only Genuine NISSAN
Long Life Antifreeze/Coolant (blue) or
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*: Check the fuel hoses, piping and
connections for leaks, looseness, or deterio-
ration. Tighten connections 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.
9-6Maintenance and schedules

Additional information
NOTE FOR ENGINE COOLANT *:
(1) 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.
(2) 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.
* Maintenance items and intervals with “ *
” are recommended by NISSAN 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.
NOTE FOR SPARK PLUGS:
(1) Replace every 105,000 miles
(168,000 km)
(2) Replace spark plug when the plug gap
exceeds 0.045 in (1.25 mm) even if within
specified replacement mileage.
Maintenance and schedules9-25

The following are approximate capacities. The actual refill capacities may be slightly different. When refilling, follow the procedure described
in the “Do-it-yourself” section to determine the proper refill capacity.
Fluid typeCapacity (approximate)
Recommended Fluids/Lubricants
Metric
Measure US
Measure Imperial
Measure
Fuel 60 L 15-7/8 gal 13-1/4 gal • For additional information, see “Fuel recommendation” (P. 10-3).
Engine oil*1
Drain and refill
*1 For additional information,
see “Engine oil” (P. 8-6). With oil filter
change 4.7 L 5 qt 4-1/8 qt • Genuine “NISSAN Motor Oil Ester 5W-30 SN” (or equivalent) is rec-
ommended.
• If the above motor oil (or engine oil) is not available, a synthetic SAE
5W-30 GF-5 SN motor oil (or engine oil) may be used. Damage caused
by the use of motor oil (or engine oil) other than as recommended is not
covered under INFINITI’s New Vehicle Limited Warranty. For addi-
tional information, see “Engine oil and oil filter recommendations”
(P. 10-6).
Without oil filter
change 4.6 L 4-7/8 qt 4 qt
Engine coolant
(with reservoir) 7.7 L 2 gal 1-3/4 gal• Pre-diluted Genuine NISSAN Long Life Antifreeze/Coolant (blue) or
equivalent
Continuously Variable Transmission (CVT) fluid —— —• Genuine NISSAN CVT Fluid NS-3
• INFINITI recommends using Genuine NISSAN CVT Fluid NS-3 (or
equivalent) ONLY in INFINITI CVTs. Do not mix with other fluids. Using
fluids that are not equivalent to Genuine NISSAN CVT Fluid NS-3 may
damage the CVT. Damage caused by the use of fluids other than as
recommended is not covered under INFINITI’s New Vehicle Limited
Warranty outlined in your Warranty Information Booklet.
Differential gear oil —— — • Genuine NISSAN HYPOID FLUID•S1 GL-5 75W-80 or equivalent
Transfer oil —— —• Genuine NISSAN Differential Oil Hypoid Super GL-5 80W-90 or
equivalent conventional (non-synthetic) oil
Brake fluid —— —• Genuine NISSAN Super Heavy Duty Brake Fluid*2 or equivalent DOT
3
*2: Available in mainland U.S.A. through an INFINITI retailer
Multi-purpose grease —— — • NLGI No. 2 (Lithium Soap base)
RECOMMENDED FLUIDS/
LUBRICANTS AND CAPACITIES
10-2Technical and consumer information