Page 443 of 652
443
GS450h_OM_OM30F70U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Tires
Check if the treadwear indicators are sh owing 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.
Replace or rotate tires in accord ance with maintenance schedules and
treadwear.
Checking tires
New tread
Worn tread
Treadwear indicator
The location of treadwear indicato rs is shown by the “TWI” or “” mark, etc.,
molded into the sidewall of each tire.
Replace the tires if the treadwear indicators are showing on a tire.
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Page 542 of 652
5427-2. Steps to take in an emergency
GS450h_OM_OM30F70U_(U)
Location of the spare tire, jack and tools
Jack handle
Parking brake release tool
Screwdriver
Towing eyeletWheel nut wrench
Spare tire
Jack1
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4
5
6
7
Page 553 of 652

5537-2. Steps to take in an emergency
GS450h_OM_OM30F70U_(U)
7
When trouble arises
CAUTION
■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 death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their stor-
age location to reduce the possibility of pe rsonal injury during a collision or sudden
braking.
NOTICE
■Driving with tire chains and the compact 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, tire s or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and trans-
mitter may be damaged if not handled correctly.
Page 588 of 652

588
GS450h_OM_OM30F70U_(U)
8-1. Specifications
Tire size ( P. 590)
DOT and Tire Identification Number (TIN) ( P. 5 8 9 )
Location of treadwear indicators ( P. 443)
Tire ply composition and materials
Plies are layers of rubber-coated parallel cords. Cords are the strands which form
the plies in a tire.
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-
ply tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly put into the tire. A tube type
tire has a tube inside the tire and the tube maintains the air pressure.
Load limit at maximum cold tire inflation pressure ( P. 5 9 4 )
Maximum cold tire inflation pressure ( P. 5 9 4 )
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tires or all season tires ( P. 4 4 8 )
An all season tire has “M+S” on the side wall. A tire not marked “M+S” is a summer
tire.
“TEMPORARY USE ONLY”
A compact spare tire is identified by the phrase “TEMPORARY USE ONLY”
molded on its sidewall. This tire is designed for temporary emergency use only.
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Page 647 of 652

647Alphabetical index
GS450h_OM_OM30F70U_(U)
S-FLOW mode ..................................... 349
Shift lever ................................................. 203Hybrid transmission......................... 203
If the shift lever cannot be shifted from P ........... 556
Shift lever light ....................................... 363
Shift lock system.................................... 556
Side airbags ............................................... 39
Side display ............................................. 332
Side marker lights................................... 217 Light switch ............................................. 217
Replacing light bulbs ....................... 489
Welcome light illumination control ....................................................123
Side mirrors ..............................................164 Adjusting and folding........................ 164
BSM (Blind spot monitor) ............ 300
Linked mirror function when reversing ................................. 165
Mirror position memory .................. 152
Side turn signal lights .......................... 209 Replacing light bulbs ....................... 489
Turn signal lever ................................ 209
Smart access system with push-button start .......................123 Antenna location ................................. 125
Entry functions .......................................123
Starting the hybrid system .............. 193
Warning message .............................. 519
Snow mode ............................................. 204
Snow tires ................................................ 322 Spare tire ................................................... 541
Inflation pressure................................583
Storage location ................................. 542
Spark plug ................................................579
Specifications..........................................574
Speedometer .............................................. 91
Sport mode ............................................. 280
Steering lock ............................................ 196 Column lock release ......................... 197
Steering lock system warning message...........................539
Steering wheel ......................................... 161 Adjustment............................................... 161
Audio switches
*
Heated steering wheel .................. 380
Power easy access system ............. 152
Steering wheel position memory .............................. 152
Stop lights Replacing light bulbs .......................489
Storage feature ..................................... 366
Stuck If the vehicle becomes stuck.......... 571
Sun shade Rear .......................................................... 387
Rear door ............................................. 388
Roof ............................................................ 172
Sun visors..................................................375
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.