2018 LEXUS LS500 flat tire

396 6-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U)  Stop the vehicle in a safe place on a
hard, flat surface.
 Set the parking brake.
 Shift the shift position to P.
 Disabling the height control. (if
equipped) ( → P.293)
 Stop the engine. ■
Jack and tools
As your vehicle is equipped with run-flat
tires, the following tools for replacing a tire
are not included with your vehicle. They can
be purchased at your Lexus dealer. ●
Wheel nut wrench●
Jack●
Jack handleReplacing the tire When raising your vehicle with a
jack, position the jack correctly.
Improper placement may damage
your vehicle or cause injury.
If necessary tire replacement
seems difficult to perform, contact
your Lexus dealer.
Before jacking up the vehicle WARNING■
Using the tire jack
Observe the following precautions.
Improper use of the tire jack may cause
the vehicle to suddenly fall off the jack,
leading to death or serious injury. ●
Do not use the tire jack for any pur-
pose other than replacing tires or
installing and removing tire chains. ●
Do not use other tire jacks for replac-
ing tires on this vehicle. ●
Put the jack properly in its jack point. ●
Do not put any part of your body under
the vehicle while it is supported by the
jack. ●
Do not start the engine or drive the
vehicle while the vehicle is supported
by the jack. ●
Do not raise the vehicle while some-
one is inside. ●
When raising the vehicle, do not put an
object on or under the jack. ●
Do not raise the vehicle to a height
greater than that required to replace
the tire. ●
Use a jack stand if it is necessary to get
under the vehicle. ●
Make sure to disable all functions of
the vehicle height control of the elec-
tronically modulated air suspension
and then stopping the engine.
( → P.293)●
When lowering the vehicle, make sure
that there is no-one near the vehicle. If
there are people nearby, warn them
vocally before lowering.

3976-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) 6
Maintenance and care
1 Chock the tires. 2 Slightly loosen the wheel nuts (one
turn).
3 Turn the tire jack portion by
hand until the notch of the jack is in
contact with the jack point. The jack point guides are located under
the rocker panel. They indicate the jack
point positions.
4 Raise the vehicle until the tire is
slightly raised off the ground.
5 Remove all the wheel nuts and the
tire. When resting the tire on the ground, place
the tire so that the wheel design faces up to WARNING■
Replacing a flat tire for vehicles with
power trunk opener and closer (if
equipped)
In cases such as when replacing tires,
make sure to turn off the trunk opener
main switch ( → P.106). Failure to do so
may cause the trunk lid to operate unin-
tentionally if the power trunk opener and
closer switch is accidentally touched,
resulting in hands and fingers being
caught and injured.
Removing a tire
Tire Wheel chock posi-
tions
Front Left-hand side Behind the rear
right-hand side tire
Right-hand
side Behind the rear
left-hand side tire
Rear Left-hand side In front of the front
right-hand side tire
Right-hand
side In front of the front
left-hand side tire A

3996-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) 6
Maintenance and care The recommended cold tire inflation
pressure and tire size are displayed on
the tire and loading information label.
( → P.454)
Tire valve
Tire pressure gaugeWARNING■
When installing the tire
Failure to follow these precautions could
cause the wheel nuts to loosen and the
tire to fall off, resulting in death or serious
injury. ●
Never use oil or grease on the wheel
bolts or wheel nuts.
Oil and grease may cause the wheel
nuts to be excessively tightened, lead-
ing to bolt or disc wheel damage. In
addition, the oil or grease can cause
the wheel nuts to loosen and the wheel
may fall off, causing a serious accident.
Remove any oil or grease from the
wheel bolts or wheel nuts.●
Have the wheel nuts tightened with a
torque wrench to 103 ft•lbf (140 N•m,
14.3 kgf•m) as soon as possible after
changing wheels.●
Do not attach a heavily damaged
wheel ornament, as it may fly off the
wheel while the vehicle is moving.●
When installing a tire, only use wheel
nuts that have been specifically
designed for that wheel.●
If there are any cracks or deformations
in the bolt screws, nut threads or bolt
holes of the wheel, have the vehicle
inspected by your Lexus dealer.
NOTICE
■
Repairing or replacing tires, wheels,
tire pressure warning valves, trans-
mitters and tire valve caps
→ P.392 Tire inflation pressure
Checking the specified tire infla-
tion pressure
Inspection and adjustment pro-
cedure
A
B

400 6-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) 1 Remove the tire valve cap.
2 Press the tip of the tire pressure
gauge onto the tire valve.
3 Read the pressure using the gauge
gradations.
4 If the tire inflation pressure is not at
the recommended level, adjust the
pressure.
If you add too much air, press the
center of the valve to deflate.
5 After completing the tire inflation
pressure measurem ent and adjust-
ment, apply soapy water to the
valve and check for leakage.
6 Put the tire valve cap back on. ■
Tire inflation pressure check interval
You should check tire inflation pressure
every two weeks, or at least once a month.
Do not forget to check the spare. ■
Effects of incorrect tire inflation pres-
sure
Driving with incorrect ti re inflation pressure
may result in the following: ●
Reduced fuel economy●
Reduced driving comfort and poor han-
dling●
Reduced tire life due to wear●
Reduced safety●
Damage to the drive train
If a tire needs frequent inflating, have it
checked by your Lexus dealer.
■
Instructions for checking tire inflation
pressure
When checking tire inflation pressure,
observe the following:
●
Check only when the tires are cold.
If your vehicle has been parked for at
least 3 hours or has not been driven for
more than 1 mile or 1.5 km, you will get an
accurate cold tire in flation pressure read- ing. ●
Always use a tire pressure gauge.
It is difficult to judge if a tire is properly
inflated based only on its appearance. ●
It is normal for the ti re inflation pressure
to be higher after driving as heat is gen-
erated in the tire. Do not reduce tire infla-
tion pressure after driving. ●
Never exceed the vehicle capacity
weight.
Passengers and luggage weight should
be placed so that the vehicle is balanced.
WARNING■
Proper inflation is critical to save tire
performance
Keep your tires properly inflated.
If the tires are not properly inflated, the
following conditions may occur which
could lead to an accident resulting in
death or serious injury: ●
Excessive wear ●
Uneven wear ●
Poor handling ●
Possibility of blowouts resulting from
overheated tires
●
Air leaking from between tire and
wheel
●
Wheel deformation and/or tire dam-
age
●
Greater possibility of tire damage
while driving (due to road hazards,
expansion joints, sharp edges on the
road, etc.)
NOTICE
■
When inspecting and adjusting tire
inflation pressure
Be sure to put the tire valve caps back on.
If a valve cap is not installed, dirt or mois-
ture may get into the valve and cause an
air leak, resulting in decreased tire infla-
tion pressure.

4016-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) 6
Maintenance and care When replacing wheels, care should
be taken to ensure that they are equiv-
alent to those removed in load capac-
ity, diameter, rim width and inset *
.
Replacement wheels are available at
your Lexus dealer. *
: Conventionally referred to as offset.
Lexus does not recommend using the
following:
 Wheels of different sizes or types
 Used wheels
 Bent wheels that have been straight-
ened ■
When replacing wheels
The wheels of your vehicle are equipped
with tire pressure warning valves and trans-
mitters that allow the tire pressure warning
system to provide advance warning in the
event of a loss in tire inflation pressure.
Whenever wheels are replaced, the tire
pressure warning valv es and transmitters
must be installed. ( → P.392)  Use only Lexus wheel nuts and
wheel nut wrenches designed for
use with your aluminum wheels.
 When rotating, repairing or chang-
ing your tires, check that the wheel
nuts are still tight after driving 1000
miles (1600 km).
 Be careful not to damage the alumi-
num wheels when using tire chains.
 Use only Lexus genuine balance
weights or equivalent and a plastic
or rubber hammer when balancing
your wheels.Wheels If a wheel is bent, cracked or heavily
corroded, it should be replaced.
Otherwise, the tire may separate
from the wheel or cause a loss of
handling control.
Wheel selection
WARNING
■
When replacing wheels
●
Do not use wheels that are a different
size from those recommended in the
Owner’s Manual, as this may result in a
loss of handling control. ●
Never use an inner tube in a leaking
wheel which is designed for a tubeless
tire.
Doing so may result in an accident,
causing death or serious injury. ■
Use of defective wheels prohibited
Do not use cracked or deformed wheels.
Doing so could cause the tire to leak air
during driving, possibly causing an acci-
dent.
NOTICE■
Replacing tire pressure warning
valves and transmitters ●
Because tire repair or replacement
may affect the tire pressure warning
valves and transmitters, make sure to
have tires serviced by your Lexus
dealer or other qua lified service shop.
In addition, make sure to purchase
your tire pressure warning valves and
transmitters at your Lexus dealer. ●
Ensure that only genuine Lexus wheels
are used on your vehicle.
Tire pressure warning valves and trans-
mitters may not work properly with
non-genuine wheels.
Aluminum wheel precautions

409
LS500_OM_OM50F54U_(U) 7 7
When trouble arises When trouble arises .
7-1. Essential information
Emergency flashers................... 410
If your vehicle has to be stopped in
an emergency ........................... 410
7-2. Steps to take in an emergency
If your vehicle needs to be towed
......................................................... 412
If you think something is wrong
......................................................... 416
Fuel pump shut off system ...... 417
If a warning light turns on or a
warning buzzer sounds ........ 418
If a warning message is displayed
........................................................ 428
If you have a flat tire.................. 432
If the engine wi ll not start ....... 433
If you lose your keys ................. 435
If the fuel filler door cannot be
opened........................................ 435
If the electronic key does not
operate properly .................... 436
If the vehicle battery is discharged
........................................................ 438
If your vehicle overheats ........ 443
If the vehicle becomes stuck
........................................................ 446

412 7-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) 7-2.Steps to take in an emergency
If your vehicle needs to be
towed If towing is ne cessary, we recom-
mend having your vehicle towed by
your Lexus dealer or commercial
towing service, using a wheel-lift
type truck or flatbed truck.
Use a safety chain system for all
towing, and abide by all state/pro-
vincial and local laws. WARNING
Observe the following precautions.
Failure to do so may result in death or
serious injury. ■
When towing the vehicle 
2WD models
Be sure to transport the vehicle with all
four wheels raised off the ground. If the
vehicle is towed with the tires contacting
the ground, the driv etrain and related
parts may be damaged or an accident
may occur due to a change in direction
of the vehicle. 
AWD models
Be sure to transport the vehicle with all
four wheels raised off the ground. If the
vehicle is towed with the tires contacting
the ground, the driv etrain or related
parts may be damaged, the vehicle may
fly off the truck.
■
While towing ●
When towing using cables or chains,
avoid sudden starts, etc. which place
excessive stress on the towing eyelets,
cables or chains. The towing eyelets,
cables or chains may become dam-
aged, broken debris may hit people,
and cause serious damage.
●
Make sure to disable all functions of
the vehicle height control of the elec-
tronically modulated air suspension.
Otherwise, the vehicle height may
change and part of your body may be
caught under the vehicle, possibly
causing injury. ( → P.293)
●
Do not turn the engine switch off.
This may lead to an accident as the
rear wheels will be locked by the park-
ing lock.
Also, there is a possibility that the
steering wheel is locked and cannot be
operated.

416 7-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U)  Fluid leaks under the vehicle.
(Water dripping from the air condi-
tioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
needle continually points higher
than normal.
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the engine
 Engine missing, stumbling or run-
ning roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when braking  Vehicle pulls heavily to one side
when driving on a level road
 Loss of brake effectiveness, spongy
feeling, pedal almost touches the
floor
If you think something is
wrong If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms