2020 LEXUS NX300 maintenance

3256-1. Maintenance and care
LEXUS NX300 Owners Manual_USA_M78389_en
6
Maintenance and care
Remove dirt using a water-damp-
ened soft cloth or synthetic chamois.
 Wipe the surface with a dry, soft
cloth to remove any remaining
moisture.
■Cleaning the areas with satin-finish
metal accents
The metal areas use a layer of real metal for
the surface. It is necessary to clean them
regularly. If dirty areas are left uncleaned for
long periods of time, they may be difficult to
clean.
 Remove dirt and dust using a vac-
uum cleaner.
 Wipe off any excess dirt and dust
with a soft cloth dampened with
diluted detergent.
Use a diluted water so lution of approxi-
mately 5% neutral wool detergent.
 Wring out any excess water from
the cloth and thoroughly wipe off all
remaining traces of detergent.
 Wipe the surface with a dry, soft
cloth to remove any remaining
moisture. Allow the leather to dry in
a shaded and ventilated area.
■Caring for leather areas
Lexus recommends cleani ng the interior of
the vehicle at least twice a year to maintain
the quality of the vehicle’s interior.
 Remove dirt and dust using a vac-
uum cleaner.
 Wipe it off with a soft cloth damp-
ened with neutral detergent diluted
to approximately 1%.
 Wring out any excess water from
the cloth and thoroughly wipe off
remaining traces of detergent and
water.
NOTICE
■Cleaning the front side windows
Do not use any compound or abrasive
product (e.g., glass cleaner, detergent,
wax) to clean the wi ndows. It may dam-
age the coating.
Cleaning the areas with satin-fin-
ish metal accents
Cleaning the leather areas
Cleaning the synthetic leather
areas

3266-2. Maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
6-2.Maintenance
■Repair and replacement
It is recommended that genuine Lexus parts
be used for repairs to ensure performance
of each system. If non-Lexus parts are used
in replacement or if a repair shop other than
a Lexus dealer perfor ms repairs, confirm
the warranty coverage.
■Allow inspection and repairs to be per-
formed by a Lexus dealer
●Lexus technicians are well-trained spe-
cialists and are kept up to date with the
latest service information. They are well
informed about the operation of all sys-
tems on your vehicle.
●Keep a copy of the repa ir order. It proves
that the maintenance that has been per-
formed is under warra nty coverage. If any
problem should arise while your vehicle is
under warranty, your Lexus dealer will
promptly take care of it.
General maintenance should be per-
formed on a daily basis. This can be
done by yourself or by a Lexus dealer.
Scheduled maintenance should be
performed at specified intervals
according to the maintenance sched-
ule.
For details about ma intenance items and
schedules, refer to the “Warranty and Ser-
vice Guide”, “Owner’s Manual Supple-
ment” or “Scheduled Maintenance”.
■Resetting the message indicating main-
tenance is required (U.S.A. only)
After the required maintenance is pre-
formed according to the maintenance
schedule, please reset the message.
To reset the message, follow the procedures
described below:
1
Press or of the meter control
switches and select .
Maintenance requirements
To ensure safe and economical driv-
ing, day-to-day care and regular
maintenance are essential. It is the
owner’s responsibility to perform
regular checks. Lexus recommends
the following maintenance:
WARNING
■If your vehicle is not properly main-
tained
Improper maintenanc e could result in
serious damage to the vehicle and possi-
ble death or serious injury.
■Handling of the battery
●Engine exhaust, some of its constitu-
ents, and a wide variety of automobile
components contain or emit chemicals
known to the State of California to
cause cancer and birth defects and
other reproductive harm. Work in a
well ventilated area.
●Oils, fuels and fluids contained in vehi-
cles as well as waste produced by
component wear contain or emit
chemicals known to the State of Cali-
fornia to cause cancer and birth
defects or other reproductive harm.
Avoid exposure and wash any affected
area immediately.
●Battery posts, terminals and related
accessories contain lead and lead
compounds which are known to cause
brain damage. Wash your hands after
handling. ( P.340)
General maintenance
Scheduled maintenance

3276-2. Maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
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Maintenance and care
2Press or of the meter control
switches, select the “Vehicle Settings”
and then press .
3
Press or of the meter control
switches, select the “Scheduled Mainte-
nance” and then press and hold the .
4
Select the “Yes” and push .
“The Data Has Been Reset” is displayed
on the multi-information display.
You can perform some maintenance
procedures by yourself.
Please be aware that do-it-yourself
maintenance may affect warranty cov-
erage.
The use of Lexus repair manuals is recom-
mended.
For details about warranty coverage, refer
to the separate “Owner’s Guide”, “War-
ranty and Service Guide”, “Owner’s Man-
ual Supplement” or “Warranty Booklet”.
Do-it-yourself maintenance
General maintenance
Listed below are the general main-
tenance items that should be per-
formed at the intervals specified in
the “Warranty and Service Guide”
or “Owner’s Manual Supplement”.
It is recommended that any prob-
lem you notice should be brought to
the attention of your Lexus dealer
or qualified service shop for advice.
WARNING
■If the engine is running
Turn the engine off and ensure that there
is adequate ventilati on before perform-
ing maintenance checks.
Engine compartment
ItemsCheck points
BatteryCheck the connections.
(  P.340)
Brake fluid
Is the brake fluid at the
correct level?
( P.340)
Engine/inter-
cooler coolantIs the engine/intercooler
coolant at the correct
level? ( P.338)
Engine oilIs the engine oil at the
correct level? ( P.336)
Exhaust system
There should not be any
fumes or strange
sounds.

3286-2. Maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
Radiator/con-
denser
The radiator and con-
denser should be free
from foreign objects.
( P.339)
Washer fluidIs there sufficient washer
fluid? ( P.342)
Vehicle interior
ItemsCheck points
Accelerator
pedal
The accelerator pedal
should move smoothly
(without uneven pedal
effort or catching).
Automatic
transmission
“Park” mecha-
nismWhen parked on a slope
and the shift lever is in P,
is the vehicle securely
stopped?
Brake pedal
• Does the brake pedal
move smoothly?
• Does the brake pedal have appropriate
clearance from the
floor?
• Does the brake pedal have the correct
amount of free play?
ItemsCheck points
Brakes
• The vehicle should not pull to one side when
the brakes are
applied.
• The brakes should work effectively.
• The brake pedal should not feel
spongy.
• The brake pedal should not get too
close to the floor
when the brakes are
applied.
Head restraints
Do the head restraints
move smoothly and lock
securely?
Indica-
tors/buzzersDo the indicators and
buzzers function prop-
erly?
LightsDo all the lights come
on?
Parking brake
• Does the parking brake switch operate
normally?
• When parked on a slope and the parking
brake is on, is the vehi-
cle securely stopped?
Seat belts
•Do the seat belts operate smoothly?
• The seat belts should not be damaged.
ItemsCheck points

3296-2. Maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
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Maintenance and care
SeatsDo the seat controls
operate properly?
Steering wheel
• Does the steering
wheel rotate
smoothly?
• Does the steering wheel have the cor-
rect amount of free
play?
•There should not be any strange sounds
coming from the
steering wheel.
Vehicle exterior
ItemsCheck points
DoorsDo the doors operate
smoothly?
Engine hood
Does the engine hood
lock system work prop-
erly?
Fluid leaks
There should not be any
signs of fluid leakage
after the vehicle has
been parked.
ItemsCheck points
Tires
• Is the tire inflation pressure correct?
• The tires should not be damaged or exces-
sively worn.
• Have the tires been rotated according to
the maintenance
schedule?
• The wheel nuts should not be loose.
Windshield wip-
ers/rear win-
dow wiper
• The wiper blades should not show any
signs of cracking,
splitting, wear, con-
tamination or defor-
mation.
• The wiper blades should clear the wind-
shield/rear window
without streaking or
skipping.
ItemsCheck points

3306-2. Maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
The OBD system determines that a
problem exists somewhere in the emis-
sion control system. Your vehicle may
not pass the I/M test and may need to
be repaired. Contact your Lexus
dealer to service the vehicle.
When the battery is disconnected
or discharged
Readiness codes that are set during
ordinary driving are erased.
Also, depending on your driving
habits, the readiness codes may not
be completely set.
 When the fuel tank cap is loose
The malfunction indicator lamp
comes on indicating a temporary
malfunction and your vehicle may
not pass the I/M test. The error code in the OBD system will
not be cleared unless the vehicle is
driven 40 or more times.
Contact your Lexus dealer to prepare
the vehicle for re-testing.
Emission inspection and
maintenance (I/M) pro-
grams
Some states have vehicle emission
inspection programs which include
OBD (On Board Diagnostics)
checks. The OBD system monitors
the operation of the emission con-
trol system.
If the malfunction indicator lamp
comes on
Your vehicle may not pass the
I/M test in the following situa-
tions:
When the malfunction indicator
lamp still remains on after sev-
eral driving trips
If your vehicle does not pass the
I/M test

3316-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
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Maintenance and care
6-3.Do-it-yourself maintenance
Do-it-yourself service pre-
cautions
If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.
Maintenance
ItemsParts and tools
Battery condi-
tion (P.340)
•Warm water
• Baking soda
•Grease
• Conventional wrench
(for terminal clamp
bolts)
Brake fluid level
( P.340)
•FMVSS No.116 DOT
3 or SAE J1703;
FMVSS No.116 DOT
4 or SAE J1704 brake
fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/inter-
cooler coolant
level ( P.338)
•“Toyota Super Long
Life Coolant” or a sim-
ilar high quality eth-
ylene glycol-based
non-silicate, non-
amine, non-nitrite and
non-borate coolant
with long-life hybrid
organic acid technol-
ogy
For the U.S.A.:
“Toyota Super Long
Life Coolant” is pre-
mixed with 50% cool-
ant and 50% deion-
ized water.
For Canada:
“Toyota Super Long
Life Coolant” is pre-
mixed with 55% cool-
ant and 45% deion-
ized water.
• Funnel (used only for adding coolant)
Engine oil level
( P.336)
•“Toyota Genuine
Motor Oil” or equiva-
lent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P.358)Fuse with same amper-
age rating as original
Light bulbs
( P.361)Bulb with same number
and wattage rating as
original
Headlight aimPhillips-head screw-
driver
Radiator and
condenser
( P.339)
—
ItemsParts and tools

3326-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
Tire inflation
pressure
( P.351)• Tire pressure gauge
• Compressed air
source
Washer fluid
( P.342)
• Water or washer fluid
containing antifreeze
(for winter use)
• Funnel (used only for adding water or
washer fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions.
■When working on the engine com-
partment
●Keep hands, clothi ng and tools away
from the moving fan and engine drive
belt.
●Be careful not to touch the engine,
radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil
and other fluids may also be hot.
●Do not leave anything that may burn
easily, such as paper and rags, in the
engine compartment.
●Do not smoke, cause sparks or expose
an open flame to fuel or the battery.
Fuel and battery fumes are flammable.
●Be extremely cautions when working
on the battery. It contains poisonous
and corrosive sulfuric acid.
ItemsParts and tools■When working near the electric cool-
ing fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION
ON mode, the electric cooling fans may
automatically start to run if the air condi-
tioning is on and/or the coolant tempera-
ture is high. ( P.339)
■Safety glasses
Wear safety glasses to prevent flying or
falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter
removed may cause excessive engine
wear due to dirt in the air.