Page 408 of 612
408
GS350_OM_OM30F69U_(U)
6-3. Do-it-yourself maintenance
Tires
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.
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 503 of 612
5037-2. Steps to take in an emergency
GS350_OM_OM30F69U_(U)
7
When trouble arises
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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Page 514 of 612

5147-2. Steps to take in an emergency
GS350_OM_OM30F69U_(U)
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 548 of 612

548
GS350_OM_OM30F69U_(U)
8-1. Specifications
Tire size ( P. 550)
DOT and Tire Identification Number (TIN) ( P. 549)
Location of treadwear indicators ( P. 4 0 8 )
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 5 4 )
Maximum cold tire inflation pressure ( P. 5 5 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. 413)
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 605 of 612

605Alphabetical index
GS350_OM_OM30F69U_(U)
Seats.............................................................134Adjustment ............................................. 134
Adjustment precautions .................. 135
Child seats/child restraint system installation..............................59
Cleaning .................................................378
Driving position memory ................ 136
Head restraints ......................................142
Power easy access system ............ 136
Properly sitting in the seat ................ 28
Seat heaters .......................................... 347
Seat position memory....................... 136
Seat ventilators .................................... 347
Sensor Automatic headlight system .......... 199
Humidity sensor .................................. 315
Inside rear view mirror ......................147
Intuitive parking assist
*
Lexus night view .................................. 281
LKA (Lane-Keeping Assist) ......... 233
Radar sensor ................227, 260, 270
Rain-sensing windshield wipers ...................................................207
Service reminder indicators ................76
S-FLOW mode .......................................313
Shift lever .................................................. 184 Automatic transmission ................... 184
If the shift lever cannot be shifted from P ............. 517
Shift lever light ....................................... 327
Shift lock system......................................517
Side airbags ............................................... 37
Side display ............................................. 296 Side marker lights .................................. 196
Light switch.............................................196
Replacing light bulbs ....................... 453
Welcome light illumination control....................................................107
Side mirrors .............................................. 148 Adjusting and folding ........................148
Blind Spot Monitor ........................... 267
Linked mirror function when reversing..................................149
Mirror position memory ..................136
Side turn signal lights ............................190 Replacing light bulbs ....................... 453
Turn signal lever .................................. 190
Smart access system with push-button start ....................... 107 Antenna location................................. 109
Entry functions ......................................107
Starting the engine .............................. 177
Warning message............................. 484
Snow tires .................................................287
Spare tire ................................................. 502 Inflation pressure................................ 542
Storage location .................................503
Spark plug ............................................... 538
Specifications......................................... 534
Speedometer .............................................. 81
Steering lock ........................................... 180 Column lock release .......................... 181
Steering lock system warning message.......................... 500
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.