2020 LEXUS NX300 coolant level

3406-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_en
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN” lines
on the tank.
■Adding fluid
Make sure to check the fluid type and
prepare the necessary item.
 Fluid type
FMVSS No.116 DOT 3 or SAE J1703;
FMVSS No.116 DOT 4 or SAE J1704
brake fluid
Items
Clean funnel
■Brake fluid can absorb moisture from
the air
Excess moisture in the brake fluid can cause a dangerous loss of braking efficiency. Use
only newly opened brake fluid.
Check the battery as follows.
■Battery exterior
Make sure that the battery terminals
are not corroded and that there are no
loose connections, cracks, or loose
clamps.
Terminals
Hold-down clamp
WARNING
■When the electric cooling fans are
operating
Do not touch the engine compartment.
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. Be sure the engine switch is
off when working near the electric cool-
ing fans or radiatorgrille.
Checking and adding the brake
fluid
WARNING
■When filling the reservoir
Take care as brake fluid can harm your
hands and eyes and damage painted sur-
faces.
If fluid gets on your hands or in your eyes,
flush the affected area with clean water
immediately.
If you still experience discomfort, see a
doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go
down slightly as the brake pads wear out
or when the fluid leve l in the accumulator
is high.
If the reservoir need s frequent refilling,
there may be a serious problem.
Checking the battery
A
B

3737-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_en
7
When trouble arises
Fluid leaks under the vehicle
(Water dripping from the air condi-
tioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
needle continually points higher
than normal
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the engine
 Engine misfire or misses, stumbling
or running roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when braking 
Vehicle pulls heavily to one side
when driving on a level road
 Loss of brake effectiveness, spongy
feeling, pedal almost touches the
floor
If you think something is
wrong
If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms

4047-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_en
radiator core (radiator) for any
leaks.
Radiator
Cooling fans
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir.
Engine
Reservoir
“FULL” line
“LOW” line
Intercooler radiatorReservoir
“FULL” line
“LOW” line
5 Add coolant if necessary.
Engine
Water can be used in an emergency if
coolant is unavailable.
Intercooler radiator
Water can be used in an emergency if
coolant is unavailable.
A
B
A
B
C
A
B
C

4228-1. Specifications
LEXUS NX300 Owners Manual_USA_M78389_en
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology
Tire related
termMeaning
Cold tire infla-
tion pressure
Tire pressure when the
vehicle has been parked
for three hours or more, or
has not been driven more
than 1 mile or 1.5 km under
that condition
Maximum
inflation pres-
sureThe maximum cold inflated
pressure to which a tire
may be inflated, shown on
the sidewall of the tire
Recom-
mended infla-
tion pressureCold tire inflation pressure
recommended by a manu-
facturer
Accessory
weight
The combined weight (in
excess of thos e standard
items which may be
replaced) of transmission,
power steering, power
brakes, power windows,
power seats, radio and
heater, to the extent that
these items are available as
factory-installed equip-
ment (whether installed or
not)
Curb weight
The weight of a motor
vehicle with standard
equipment, including the
maximum capacity of fuel,
oil and coolant, and if so
equipped, air conditioning
and additional weight
optional engine
Maximum
loaded vehi-
cle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options
weight
Normal occu-
pant weight
150 lb. (68 kg) times the
number of occupants
specified in the second
column of Table 1
* that fol-
lows
Occupant
distribution
Distribution of occupants
in a vehicle as specified in
the third column of Table 1
*
below
Production
options
weight
The combined weight of
installed regu lar produc-
tion options weighing over
5 lb. (2.3 kg) in excess of
the standard items which
they replace, not previ-
ously considered in curb
weight or accessory
weight, including heavy
duty brakes, ride levelers,
roof rack, heavy duty bat-
tery, and special trim
Rim
A metal support for a tire
or a tire and tube assembly
upon which the tire beads
are seated
Rim diameter
(Wheel diam-
eter)Nominal diameter of the
bead seat
Rim size des-
ignationRim diameter and width
Tire related termMeaning

466Alphabetical Index
LEXUS NX300 Owners Manual_USA_M78389_en
Trailer Sway Control.................................. 260
Trailer towing ....................................... 155, 163
Transmission
Automatic transmission ........................... 168
Selecting a driving mode.......................258
Trip meters .........................................................79
Turn signal lights Replacing light bulbs................................ 362
Turn signal lever ........................................... 172
Wattage............................................................415
V
Vanity lightsVanity lights .................................................. 299
Wattage............................................................415
Vanity mirrors ............................................... 299 Vanity lights .................................................. 299
Vehicle data recordings ..................................6
Vehicle identification number ................408
Vehicle Stability Control (VSC) ........... 260
VSC (Vehicle Stabilit y Control) ........... 260
W
Warning buzzers
Approach warning...................................... 231
Downshifting ....................................................171
Intuitive parking assist.............................. 240
Light reminder............................................... 179
Open door....................................................... 101
Seat belt reminder........................ 379, 380
Vehicle sway warning ............................... 219 Warning lights
ABS ................................................................... 377
Brake hold operated indicator ........... 379
Brake Override System .......................... 381
Brake system................................................375
Charging system........................................375
Drive-Start Control.................................... 381
Electric power steering........................... 377
High coolant temperature..................... 376
LDA indicator ..............................................378
Low engine oil pressure.........................375
Low fuel level ............................................... 379
LTA indicator ...............................................378
Malfunction indicator lamp ................... 376
Master warning light................................ 380
Parking brake indicator .......................... 379
PCS warning light ..................................... 377
PKSB OFF indicator ................................378
Seat belt reminder light.............. 379, 380
Slip indicator .................................................378
SRS .................................................................... 376
Tire pressure ............................................... 380
Warning messages ..................................... 384
Washer Checking ....................................................... 342
Low washer fluid warning message342, 384
Preparing and checking before winter ..........................................................................266
Switch..................................................... 184, 189
Washing and waxing.................................. 320
Weights Cargo capacity ..................... 152, 154, 408
Load limits ..........................................154, 408
Weights ......................................................... 408