3576-3. Do-it-yourself maintenance
LEXUS NX300h Owners Manual_USA_M78578_en
6
Maintenance and care
Check if the treadwear indicators are
showing on the tires. Also check the
tires for uneven wear, such as excessive
wear on one side of the tread.
Check the spare tire condition and
pressure if not rotated.
New tread
Worn tread
Treadwear indicator
The location of treadwear indicators is
shown by a “TWI” or mark, etc.,
molded into the sidewall of each tire.
Replace the tires if the treadwear indica- tors are showing on a tire.
■When to replace your vehicle’s tires
Tires should be replaced if:
●The treadwear indicators are showing on
a tire.
●You have tire damage such as cuts, splits,
cracks deep enough to expose the fabric,
and bulges indicating internal damage.
●A tire goes flat repe atedly or cannot be
properly repaired due to the size or loca-
tion of a cut or other damage.
If you are not sure, consult with your Lexus
dealer.
■Tire life
Any tire over 6 years old must be checked
by a qualified technician even if it has sel-
dom or never been used or damage is not
obvious.
■Maximum load of tire
Check that the maximum load of the
replacement tire is greater than 1/2 of the
Gross Axle Weight Ratings (GAWR) of
either the front axle or the rear axle, which-
ever is greater.
For the GAWR, see the Certification Label.
For the maximum load of the tire, see the
load limit at maximum cold tire inflation
pressure mentioned on the sidewall of the
tire. ( P.434)
■Tire types
●Summer tires
Summer tires are high-speed perfor-
mance tires best suited to highway driv-
ing under dry conditions. Since summer
tires do not have the same traction per-
formance as snow tires, summer tires are
inadequate for driving on snow-covered
or icy roads. For driving on snow-covered
Tires
Replace or rotate tires in accor-
dance with maintenance schedules
and treadwear.
Checking tires
A
B
C
3967-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78578_en
The light will go off after several driving
trips.
If the light does not go off even after several
trips, contact your Lexus dealer as soon as
possible.
■When the tire pressure warning light
comes on
Inspect the appearance of the tire to check
that the tire is not punctured.
If the tire is punctured: P.402
If the tire is not punctured:
Carry out the following procedure after the
tire temperature has lowered sufficiently.
●Check the tire inflation pressure and
adjust to the appropriate level.
●If the warning light does not go out even
after several minutes, check that the tire
inflation pressure is at the specified level
and carry out initialization. ( P.363)
The warning light may come on again if the
above operations are conducted without
first allowing the tire temperature to lower
sufficiently.
■The tire pressure warning light may
come on due to natural causes
The tire pressure wa rning light may come
on due to natural causes such as natural air
leaks and tire inflation pressure changes
caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with
a tire pressure warning valve and transmit-
ter. If a tire goes flat, the tire pressure warn-
ing light will not turn off even though the flat
tire has been replaced with the spare tire.
Replace the spare tire with the repaired tire
and adjust the tire inflation pressure. The
tire pressure warning lig ht will go off after a
few minutes.
■Conditions that the tire pressure warn-
ing system may not function properly
P.359
■If the tire pressure warning light fre-
quently comes on after blinking for 1
minute
If the tire pressure wa rning light frequently comes on after blinking
for 1 minute when
the power switch is turned to ON mode,
have it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard
due to being in a noisy location or audio
sound.
WARNING
■If both the ABS and the brake system
warning lights remain on
Stop your vehicle in a safe place immedi-
ately and contact your Lexus dealer. The
vehicle will become extremely unstable
during braking, and the ABS system may
fail, which could cause an accident
resulting in death or serious injury.
■When the electric power steering
system warning light comes on
When the light comes on yellow, the
assist to the power st eering is restricted.
When the light comes on red, the assist
to the power steering is lost and handling
operations of the steering wheel become
extremely heavy. When steering wheel
operations are heavier than usual, grip
the steering wheel firmly and operate it
using more force than usual.
■If the tire pressure warning light
comes on
Be sure to observe the following precau-
tions. Failure to do so could cause a loss
of vehicle control and result in death or
serious injury.
●Stop your vehicle in a safe place as
soon as possible. Adjust the tire infla-
tion pressure immediately.
WARNING
●If the tire pressure warning light comes
on even after tire inflation pressure
adjustment, it is prob able that you have
a flat tire. Check the tire s. If a tire is flat,
change it with the spare tire and have
the flat tire repaired by the nearest
Lexus dealer.
4027-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78578_en
Stop the vehicle in a safe place on a
hard, flat surface.
Set the parking brake.
Shift the shift lever to P.
Stop the hybrid system.
Turn on the emergency flashers.
( P.380)
Jack handle
Wheel nut wrench
Towing eyelet
Spare tire
Jack
If you have a flat tire
Your vehicle is equipped with a
spare tire. The flat tire can be
replaced with the spare tire.
For details about tires: P.357
WARNING
■If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat
tire can damage the tire and the wheel
beyond repair, which could result in an
accident.
Before jacking up the vehicle
Location of the spare tire, jack and tools
A
B
C
D
E
4097-2. Steps to take in an emergency
LEXUS NX300h Owners Manual_USA_M78578_en
7
When trouble arises
One of the following may be the cause
of the problem:
The electronic key may not be func-
tioning properly. ( P.412)
There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle. ( P.70)
There may be a malfunction in the
immobilizer system. ( P.75)
There may be a malfunction in the
steering lock system.
The hybrid system may be malfunc-
tioning due to an electrical problem
such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the hybrid system. ( P.410)
WARNING
■After using the tools and jack
Before driving, make sure all the tools
and jack are securely in place in their
storage location to reduce the possibility
of personal injury during a collision or
sudden braking.
NOTICE
■Be careful when driving over bumps
with the compact spare tire installed
on the vehicle
The vehicle becomes lower when driving
with the compact spare tire compared to
when driving with standard tires. Be
careful when driving over uneven road
surfaces.
■Driving with tire chains and the com-
pact spare tire
Do not fit tire chains to the compact
spare tire.
Tire chains may damage the vehicle body
and adversely affect driving perfor-
mance.
■When replacing the tires
When removing or fitting the wheels,
tires or the tire pressure warning valve
and transmitter, contact your Lexus
dealer as the tire pr essure warning valve
and transmitter may be damaged if not
handled correctly.
If the hybrid system will not
start
Reasons for the hybrid system not
starting vary depending on the situ-
ation.
Check the following and perform
the appropriate procedure:
The hybrid system will not start
even though the correct starting
procedure is being followed.
( P.174)
4348-1. Specifications
LEXUS NX300h Owners Manual_USA_M78578_en
Full-size tire
Compact spare tire
Tire size ( P.436)
DOT and Tire Identification Number (TIN) ( P.435)
Location of treadwear indicators ( P.357)
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands which form the plies
in a tire.
Tire information
Typical tire symbols
A
B
C
D
LEXUS NX300h Owners Manual_USA_M78578_en
Alphabetical Index479
How to wear your seat belt ......................27
How your child should wear the seat belt
.............................................................................27
Pregnant women, proper seat belt use ............................................................................ 26
Reminder light and buzzer ................... 393
Seat belt extender .........................................27
Seat belt instructions for Canadian own- ers...................................................................456
Seat belt pretensioners .............................. 30
SRS warning light ......................................390
Seat heaters ................................................... 299
Seat position memory................................. 138
Seat ventilators .............................................. 301
Seating capacity................................. 164, 424
Seats Adjustment............................................132, 133
Adjustment precautions .................132, 134
Child seats/child restraint system installa-tion .....................................................................47
Cleaning......................................................... 335
Driving position memory........................ 138
Folding down the rear seatbacks........134
Front seat heaters ..................................... 300
Head restraint..................................................141
Power easy access system .................... 138
Properly sitting in the seat ........................ 25
Rear seat heaters ...................................... 300
Seat position memory .............................. 138
Seat ventilators............................................. 301
Sécurité de l’enfant Précautions avec les coussins gonflables.........................................................................460
Sensor Automatic High Beam system..............193
BSM (Blind Spot Monitor) ................... 265
Inside rear view mirror..............................145
Intuitive parking assist.............................. 248
Kick sensor....................................................... 118
Radar sensor................................................205
Rain-sensing windshield wipers.........200
Service plug ...................................................... 70 Service reminder message ..................... 339
Shift lever ......................................................... 180
Shift lock system.............................................. 181
Side airbags ...................................................... 32
Side doors.......................................................... 110
Side marker lights
Light switch .................................................... 190
Replacing light bulbs ....................375, 376
Wattage ............................................................431
Side mirrors .....................................................146 Adjusting and folding................................ 146
Blind Spot Monitor (BSM).................... 262
Heaters............................................................ 292
Side turn signal lights Replacing light bulbs ................................375
Turn signal lever .......................................... 183
Smart access system with push-button start...................................................................126Antenna location ..........................................126
Entry functions ....................................... 110, 115
Starting the hybrid system .......................174
Warning message .................................... 398
Snow tires ....................................................... 279
Spare tire Inflation pressure ....................................... 430
Storage location .........................................402
Spark plug ...................................................... 428
Specifications ................................................ 424
Speedometer ................................................... 84
Sport mode .................................................... 270
Steering wheel Adjustment ......................................................143
Heated steering wheel ............................299
Power easy access system .................... 138
Stop lights Replacing light bulbs ................................375
Storage feature ............................................305
Storage precautions...................................305
Stuck If the vehicle becomes stuck ..................421
Sun visors ..........................................................312