3746-3. Do-it-yourself maintenance
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 side wall 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 repeatedly 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.
■Proper storage of the spare tire
(RX450hL)
As an improperly stored spare tire may
cause damage to the wire cable that holds
it, check that the spare tire is stored prop-
erly on a daily basis.
●If the stored spare tire appears to be
slanted or rattles while driving, the spare
tire may not be properly stored. Store the
spare tire again by performing the follow-
ing tire change procedure correctly:
1 If the spare tire is slanted, the hoist
assembly may be stuck in the wheel
opening. If the spare tire rattles while
driving, it may not be fully raised. Lower
the spare tire to the ground and make
sure that the hoist assembly is perpen-
dicular to the wheel opening.
2 Raise the tire slowly and steadily until a
click is heard and the jack handle skips.
If the spare tire cannot be lowered, the wire
cable may be severed. Have the vehicle
Tires
Replace or rotate tires in accor-
dance with maintenance schedules
and treadwear.
Checking tires
A
B
C
4257-2. Steps to take in an emergency
7
When trouble arises
RX450hJack handle
Wheel nut wrench
Spare tire
Wheel lock key
* (if equipped)
Jack
*: Documentation relating to the wheel lock key, such as the registration and I.D. card, is
inside the glove box.
Location of the spare tire, jack and tools
A
B
C
D
E
4357-2. Steps to take in an emergency
7
When trouble arises
WARNING
• PCS (Pre-Collision System)
• LTA (Lane Tracing Assist)
• RSA (Road Sign Assist) (if equipped)
• Automatic High Beam
• AFS (Adaptive Front-lighting System) (if equipped)
• Tire pressure warning system
• Intuitive parking assist (if equipped)
• PKSB (Parking Support Brake) (if equipped)
• Lexus parking assist monitor (if equipped)
• Panoramic view monitor (if equipped)
• BSM (Blind Spot Monitor) (if equipped)
• Navigation system (if equipped)
Also, not only can the following system
not be utilized fully, but it may even nega-
tively affect the drive-train components:
•E-Four
■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
performance.
■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 pressure warning valve
and transmitter may be damaged if not
handled correctly.
■When stowing the flat tire
(RX450hL)
●Ensure that there is no object caught
between the tire and the vehicle
underbody.
●Securely tighten the spare tire clamp
bolt to hold the spare wheel carrier by
the hook.
●Stow the flat tire in the spare tire loca-
tion. Failure to do so may cause dam-
age to the spare tire carrier. Proper
storage reduces the possibility of injury
in a collision or during sudden braking.
●Have the flat tire repaired and the
spare tire replaced wi th it as soon as
possible.
4638-1. Specifications
8
Vehicle specifications
Full-size tire
Compact spare tireTire size ( P.465)
DOT and Tire Identification Number (TIN) ( P.464)
Location of treadwear indicators ( P.374)
Tire ply composition and materials
Plies are layers of rubber-coa ted parallel cords. Cords are the strands which form the plies
in a tire.
Radial tires or bias-ply tires
Tire information
Typical tire symbols
A
B
C
D
E
514Alphabetical Index
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 .......... 413, 414
Seat belt extender ......................................... 27
Seat belt pretensioners .............................. 29
SRS warning light ........................................ 412
Seat heaters .....................................................312
Seat position memory................................. 140
Seat ventilators ...............................................312
Seating capacity.............................................170
Seats Adjustment............................................. 129, 131
Adjustment precautions ................ 129, 130
Child seats/child restraint system installa-tion .................................................................... 45
Cleaning......................................................... 353
Driving position memory........................ 140
Folding down the rear seatbacks......... 131
Head restraints ............................................. 143
Power easy access system .................... 140
Properly sitting in the seat ........................ 25
Seat heaters .................................................... 312
Seat position memory .............................. 140
Seat ventilators.............................................. 312
Sensor Automatic headlight system.................. 198
Automatic High Beam system..............201
Inside rear view mirror.............................. 147
Intuitive parking assist.............................. 252
LTA (Lane Tracing Assist).................... 225
Parking Support Brake function (rear-crossing vehicles) ...................... 274
Parking Support Brak e function (static
objects).........................................................272
Radar sensor...................................... 212, 246
Rain-sensing windshield wipers.........205
RCTA ..............................................................260
Service plug ...................................................... 69
Service reminder message ..................... 356 Shift lever
Hybrid transmission................................... 189
Shift lever light ................................................315
Side airbags ...................................................... 30
Side doors........................................................ 109
Side marker lights Light switch .................................................... 198
Replacing light bulbs................................393
Side mirrors Adjustment ..................................................... 148
BSM (Blind Sport Monitor).................. 246
Folding.............................................................. 149
Linked mirror function when reversing........................................................................... 148
Mirror position memory .......................... 140
RCTA function ............................................259
Side turn signal lights Replacing light bulbs................................393
Turn signal lever ...........................................192
Side windows ................................................... 151
Smart access system with push-button start Antenna location ......................................... 125
Entry functions ..................................... 109, 114
Starting the hybrid system ...................... 182
Smartphone holder..................................... 320
Snow tires ....................................................... 286
Spare tire......................................................... 424 Storage location .........................................425
Spark plug ...................................................... 456
Specifications ................................................ 452
Speedometer ................................................... 83
Steering lock Column lock release ................................. 183
Steering lock system warning message........................................................................... 183
Steering wheel Adjustment ..................................................... 146
Heated steering wheel ..............................312
Meter control switches ..............................89
Power easy access system .................... 140
Steering wheel position memory........ 140
516Alphabetical Index
Installing tire pressure warning valves and transmitters .......................................377
Registering ID codes ............................... 379
Warning light ................................................. 414
Tires Chains ............................................................. 287
Checking ....................................................... 374
If you have a flat tire .................................. 424
Inflation pressure....................................... 380
Information .................................................... 463
Replacing ....................................................... 424
Rotating tires ................................................ 376
Size....................................................................458
Snow tires ......................................................286
Spare tire........................................................ 424
Tire inflation pressure display function......................................................................... 376
Tire pressure warning system ............. 376
Warning light ................................................. 414
Tools.................................................................. 425
Top tether strap................................................57
Total load capacity ...................................... 452
Towing Dinghy towing ................................................ 181
Emergency towing ...................................405
Towing eyelet .............................................. 407
Trailer towing ...................................................171
TRAC (Traction Control) ........................ 279
Traction battery (hybrid battery) Hybrid battery (traction battery) air vents.............................................................................. 71
Location............................................................. 69
Specification ................................................. 454
Warning message......................................... 72
Traction Control (TRAC) ........................ 279
Traction motor (electric motor) ............... 66
Trailer Sway Control.................................. 279
Trailer towing ................................................... 171
Transmission Driving mode select switch .................. 276
Hybrid transmission .................................. 189
M mode ............................................................. 191 Paddle shift switches ........................ 190, 191
Trip meters ........................................................ 87
Turn signal lights Replacing light bulbs................................393
Turn signal lever ...........................................192
Wattage ......................................................... 460
U
USB charging ports.................................... 329
V
Vanity lights.................................................... 340Wattage ......................................................... 460
Vanity mirrors ............................................... 340
VDIM (Vehicle Dynamics Integrated Man- agement)...................................................... 279
Vehicle data recording ....................................7
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 279
Vehicle identification number ................ 452
Vehicle Stability Control (VSC) ........... 278
Ventilators (seat ventilators).....................312
VSC (Vehicle Stability Control) ........... 278
W
Warning buzzers
Approach warning.................................... 242
Brake Override System ...........................412
Door lock .......................................................... 110
Downshifting ................................................... 191
Drive-Start Control.....................................412
Electric power steering.............................413
Hands off steering wheel warning (LTA).......................................................................... 232
High coolant temperature...................... 410
Hybrid system overheat ............................ 411
Intuitive parking assist ................... 258, 415
Low engine oil pressure ............................ 411
LTA (Lane Tracing Assist)225, 228, 414
Open door ....................................................... 112