2007 Lexus GS450h spare tire

5
When trouble arises
467
5-2. Steps to take in an emergency
Firmly tighten each nut two or
three times in the order shown in
the illustration.
Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
Stow the flat tire, tire jack and all tools.
STEP4
■If you have a flat rear tire on a road covered with snow or ice
Install the compact spare tire on the front of the vehicle. Perform the following steps
and fit tire chains to the rear tires.
Replace a front tire with the compact spare tire.
Replace the flat rear tire with the tire removed from the front of the vehi-
cle.
Fit tire chains to the rear tires.
■After completing the tire change
The tire pressure warning system must be reset. ( P. 3 8 4 )
STEP5
STEP1
STEP2
STEP3

5
When trouble arises
469
5-2. Steps to take in an emergency
CAUTION
■When using the spare tire
●Remember that your spare tire is specifically designed for use with your vehicle.
Do not use your spare tire on another vehicle.
●Do not use two spare tires simultaneously.
●Replace the spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, deceleration and braking, as well as sharp cornering.
■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. Failing to observe
this precaution may lead to an accident.

470
5-2. Steps to take in an emergency
NOTICE
■Do not drive the vehicle with a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel
beyond repair.
■Be careful when driving over bumps with the compact spare tire installed on the
vehicle
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard tires. Be careful when driving over uneven road sur-
faces.
■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 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.
●Replace the grommets for the tire pressure warning valves and transmitters as
well.
■To avoid damaging the tire pressure warning valves and transmitters
Do not use liquid sealants on flat tires.

493
6-1. Specifications
6
Vehicle specifications
Tires and wheels
Ti r e s i z e245/40R18 93Y, P245/40R18 93V, 
245/40ZR18, T155/70D17 110M (spare)
Front and rear tire inflation 
pressure
(Recommended cold tire inflation
pressure)
Driving under normal conditions
35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Driving at high speeds above 100 mph (160
km/h) (in countries where such speeds are per-
mitted by law) Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the
front tires and rear tires. Never exceed the
maximum cold tire inflation pressure indicated
on the tire sidewall.
Spare tire inflation pressure 
(Recommended cold tire inflation
pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size18  8 J, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

499
6-1. Specifications
6
Vehicle specifications
Typical DOT and tire identification number (TIN)DOT symbol
*
Tire Identification Number (TIN)
Tire manufacturer’s identifica-
tion mark
Tire size code
Manufacturer’s optional tire
type code (3 or 4 letters)
Manufacturing week
Manufacturing year
*: The DOT symbol certifies that the tire conforms to applicable
Federal Motor Vehicle Safety
Standards.
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 filled in 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. 503)
Maximum cold tire inflation pressure ( P. 503)
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 tire or all season tire (P. 388)
An all season tire has “M+S” on the si dewall. A tire not marked “M+S” is a
summer tire.
“TEMPORARY USE ONLY” ( P. 4 6 2 )
A compact spare tire is identified by the phrase “TEMPORARY USE
ONLY” molded into its sidewall. This tire is designed for temporary emer-
gency use only.

523
Alphabetical index
Cleaning and maintaining 
the seat belts..................................... 355
Emergency Locking Retractor  (ELR) ........................................................ 42
How to wear your seat belt............. 40
How your child should wear 
the seat belt...........................................43
Pre-collision seat belts........................ 42
Pregnant women, 
proper seat belt use.......................... 42
Reminder light..................................... 440
Seat belt extenders ...............................43
Seat belt pretensioners........................ 41
Seat heaters.................................... 319, 321
Seat ventilators........................................ 321
Seating capacity ..................................... 175
Seats Child seats/child restraint 
system installation ............................. 85
Cleaning ................................................ 354
Driving position memory ................. 35
Head restraint ........................................ 38
Properly sitting in the seat.................64
Seat adjustment ......................................33
Seat adjustment precautions ...........33
Seat heaters..................................319, 321
Ventilated seats .................................... 321
Service reminder indicators ...............117
Shift lever If the shift lever cannot be 
shifted from P .................................... 472
Transmission ..........................................106
Shift lock system .................................... 472
Shopping bag hooks ............................327
Side airbags ................................................66
Side marker lights Switch ........................................................ 122 Side mirror
Adjusting and folding..........................48
Driving position memory ..................35
Smart access system with 
push-button start Antenna location .....................................15
Entry function ............................................13
Starting the hybrid system .............. 103
Spare tire Inflation pressure ................................493
Spare tire ................................................ 462
Spark plug................................................490
Specifications .........................................486
Speedometer ............................................ 112
Steering wheel Adjustment ............................................... 46
Audio switches....................................259
Driving position memory ..................35
Storage compartment ........................309
Storage feature......................................306
Stuck If your vehicle becomes stuck .... 483
Sun visors .................................................. 312
Switch Fog light switch .................................... 125
Light switches ........................................ 122
Mode select switch ............................ 107
Power door lock switch .................... 25
Power switch......................................... 103
Power window switch ....................... 50
Window lock switch........................... 50
Wipers and washer switch .............126

524
Alphabetical index
Tail lightsSwitch ........................................................ 122
Theft deterrent system Alarm ............................................................ 61
Hybrid vehicle immobilizer 
system ..................................................... 59
Theft prevention labels .......................... 63
Tire inflation pressure .........................493
Tire information Glossary.................................................503
Size .......................................................... 500
Tire identification number ............. 499
Uniform tire quality grading .......... 501
Tires Chains ....................................................... 177
Checking ...............................................383
Compact spare tire .......................... 462
If you have a flat tire ............... 460, 461
Inflation pressure................................ 493
Information............................................498
Pressure warning system ..............383
Replacing .................................................461
Rotating tires ........................................383
Size ........................................................... 493
Snow tires ................................................ 179
Tools ............................................................ 461
Total load capacity ................................ 175
Touch screen ........................................... 184
Towing Dinghy towing .......................................182
Emergency towing ........................... 429
Trailer towing.......................................... 181
TRAC (Traction control) .................... 164
Transmission If the shift lever cannot be shifted from P ....................................472
Mode select switch.............................107 S mode .....................................................108
Transmission..........................................106
Trip meter ................................................... 113
Trunk Opener ...................................................... 29
Trunk light .................................................. 31
Wattage ................................................. 494
Turn signal lights Replacing light bulbs ......................... 421
Switch ..........................................................110
Wattage ................................................. 494
Vanity lights Vanity lights............................................ 313
Wattage ................................................. 494
Vanity mirrors ............................................. 313
VDIM (Vehicle Dynamics 
Integrated Management) ................165
Vehicle identification number......... 487
Vehicle load limits .................................. 175
Ventilators .................................................321
VGRS (Variable Gear Ratio 
Steering) .................................................164
VSC (Vehicle Stability Control) ......164
Warning buzzers Brake system ....................................... 438
Downshifting..........................................108
Open door .......................................... 440
Seat belt reminder ............................ 440
Warning lights Anti-lock brake system (ABS) ... 439
Brake system ....................................... 438
Charging system ............................... 438T
V
W