3436-3. Do-it-yourself maintenance
LEXUS NX300 Owners Manual_USA_M78389_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.418)
■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
3827-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_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.387
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.349)
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 warning 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.345
■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 engine switch is turned to IGNITION
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.
3887-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_en
Jack handle
Wheel nut wrench
Towing eyelet
Spare tire
Jack
Screwdriver
Location of the spare tire, jack and tools
A
B
C
D
E
F
WARNING
■Using the tire jack
Observe the following precautions.
Improper use of the tire jack may cause
the vehicle to suddenly fall off the jack,
leading to death or serious injury.
●Do not use the tire jack for any pur-
pose other than replacing tires or
installing and removing tire chains.
●Only use the tire jack that comes with
this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do
not use other tire jacks for replacing
tires on this vehicle.
●Put the jack properly in its jack point.
●Do not put any part of your body under
the vehicle while it is supported by the
jack.
●Do not start the engine or drive the
vehicle while the vehicle is supported
by the jack.
●Do not raise the vehicle while some-
one is inside.
●When raising the vehicle, do not put an
object on or under the jack.
3947-2. Steps to take in an emergency
LEXUS NX300 Owners Manual_USA_M78389_en
WARNING
■When the compact spare tire is
attached
The vehicle speed may not be correctly
detected, and the following systems may
not operate correctly:
• ABS & Brake assist
• VSC
• TRAC
• Dynamic radar cruise control with full- speed range
• PCS (Pre-Collision System)
• EPS
• AVS (Adaptive Variable Suspension System) (if equipped)
• LTA (Lane Tracing Assist) (if equipped)
• LDA (Lane Departure Alert with steering control) (if equipped)
• Panoramic view monitor (if equipped)
• Lexus parking assist monitor (if equipped)
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
• BSM (Blind spot monitor) (if equipped)
• Automatic high Beam (if equipped)
Also, not only can the following system
not be utilized fully, but it may even nega-
tively affect the drive-train components:
• AWD system (if equipped)
■Speed limit when using the compact
spare tire
Do not drive at speeds in excess of 50
mph (80 km/h) when a compact spare
tire is installed on the vehicle.
The compact spare tire is not designed
for driving at high speeds. Failure to
observe this precaution may lead to an
accident causing deat h or serious injury.
■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 spar e 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 pr essure warning valve
and transmitter, contact your Lexus
dealer as the tire pressure warning valve
and transmitter may be damaged if not
handled correctly.
4188-1. Specifications
LEXUS NX300 Owners Manual_USA_M78389_en
Full-size tire
Compact spare tire
Tire size ( P.420)
DOT and Tire Identification Number (TIN) ( P.419)
Location of treadwear indicators ( P.343)
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
464Alphabetical Index
LEXUS NX300 Owners Manual_USA_M78389_en
Sensor
Automatic High Beam system............... 181
BSM (Blind Spot Monitor) ................... 252
Inside rear view mirror..............................135
Intuitive parking assist.............................. 236
Kick sensor..................................................... 108
Radar sensor..................................................193
Rain-sensing windshield wipers.......... 188
Service reminder message ..................... 326
Shift lever ......................................................... 168
Shift lock system.............................................169
Side airbags ...................................................... 32
Side doors........................................................ 100
Side marker lights Light switch .....................................................178
Replacing light bulbs................................ 362
Side mirrors .....................................................136 Adjusting and folding ................................136
BSM (Blind Spot Monitor) ...................250
Side turn signal lights Replacing light bulbs................................ 362
Turn signal lever ........................................... 172
Smart access system with push-button start.................................................................... 116Antenna location........................................... 116
Entry functions................................... 100, 105
Starting the engine ..................................... 165
Warning message.....................................384
Snow tires ....................................................... 266
Spare tire Inflation pressure..........................................413
Storage location ........................................ 388
Spark plug ......................................................... 411
Specifications ................................................408
Speedometer ....................................................79 Sport mode .................................................... 258
Steering wheel
Adjustment ..................................................... 133
Heated steering wheel ............................ 287
Power easy access system .................... 128
Stop lights Replacing light bulbs ................................362
Storage feature ............................................ 292
Storage precautions................................... 292
Stuck If the vehicle becomes stuck ............... 406
Sun visors ........................................................ 299
Switch ASC (Active Sound Control) dial....... 177
Automatic High Beam switch ................ 181
Brake hold switch ........................................175
BSM (Blind Spot Monitor) main switch......................................................................... 250
Cruise control switch............................... 225
Door lock switch ......................................... 102
Driving mode select switch ................. 258
Driving position memory switches .... 128
Emergency flashers switch .................. 366
Engine switch ................................................ 165
Fog light switch ............................................ 184
Garage door opener switches.......... 309
Heated steering wheel ............................ 287
HUD (Head-up display) switches ...... 88
Ignition switch ............................................... 165
Intuitive parking assist switch ...............236
LDA switch .....................................................219
Light switches ............................................... 178
LTA switch ....................................................... 211
Meter control switches .............................. 82
Moon roof switches................................... 140