Page 678 of 890
677
GS450h_OM_OM30D52U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Tires
New tread
Treadwear indicator
Worn tread
The location of treadwear indicators is
shown by the “TWI” or “ ∆” marks, etc.,
molded on the sidewall of each tire.
Check spare tire condition and pres-
sure if not rotated.
Replace or rotate tires in accord ance with maintenance schedules and
treadwear.
Checking tires
1
2
3
GS450h_OM_OM30D52U_(U).book Page 677 Monday, July 29, 2013 12:07 PM
Page 777 of 890
7767-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
Location of the spare tire, jack and tools
Jack handle
Parking brake release tool
Screwdriver
Towing eyeletWheel nut wrench
Spare tire
Jack1
2
3
4
5
6
7
GS450h_OM_OM30D52U_(U).book Page 776 Monday, July 29, 2013 12:07 PM
Page 788 of 890

7877-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(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 personal 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, tires 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.
GS450h_OM_OM30D52U_(U).book Page 787 Monday, July 29, 2013 12:07 PM
Page 823 of 890

822
GS450h_OM_OM30D52U_(U)
8-1. Specifications
Tire size (→ P. 8 2 4 )
DOT and Tire Identification Number (TIN) (→P. 823)
Location of treadwear indicators (→ P. 6 7 7 )
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. 8 2 8 )
Maximum cold tire inflation pressure ( →P. 8 2 8 )
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. 6 8 2 )
An all season tire has “M+S” on the sidewall. 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.
1
2
3
4
5
6
7
8
9
10
11
GS450h_OM_OM30D52U_(U).book Page 822 Monday, July 29, 2013 12:07 PM
Page 882 of 890

881Alphabetical index
GS450h_OM_OM30D52U_(U)
S-FLOW mode ..................................... 398
Shift lever ................................................. 203Hybrid transmission......................... 203
If the shift lever cannot be shifted from P ........... 790
Shift lever light ....................................... 597
Shift lock system.................................... 790
Side airbags ............................................... 39
Side marker lights................................... 217 Light switch ............................................. 217
Replacing light bulbs ........................ 723
Welcome light illumination
control ....................................................123
Side mirrors ..............................................164
Adjusting and folding ........................ 164
BSM (Blind spot monitor) ............. 324
Linked mirror function when reversing ................................. 165
Mirror position memory .................. 152
Side turn signal lights .......................... 209
Replacing light bulbs ........................ 723
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 .............................753
Snow mode ............................................. 204
Snow tires ................................................ 346 Spare tire .................................................. 775
Inflation pressure..................................817
Storage location ................................. 776
Spark plug .................................................813
Specifications......................................... 808
Speedometer .............................................. 91
Sport mode ............................................. 305
Steering lock ............................................ 196
Column lock release ......................... 197
Steering lock system warning message............................773
Steering wheel ......................................... 161
Adjustment............................................... 161
Audio switches ................................... 527
Heated steering wheel .....................614
Power easy access system ............. 152
Steering wheel position memory .............................. 152
Stop lights Replacing light bulbs ........................723
Storage feature ..................................... 600
Stuck If the vehicle becomes stuck....... 805
Sun shade
Rear ............................................................ 621
Rear door .............................................. 622
Roof ..............................................................171
Sun visors................................................. 609
GS450h_OM_OM30D52U_(U).book Page 881 Monday, July 29, 2013 12:07 PM