Page 357 of 440
3557-2. Steps to take in an emergency
7
When trouble arises
ing parts as shown in the illustration
IS300Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Solid, stationary, unpainted metallic poin t away from the battery and any mov-
ing parts as shown in the illustration
IS500
Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Solid, stationary, unpainted metallic point away from the exclusive jump starting
terminal and any mo ving parts as shown in the illustration
5 Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the battery of your vehi-
cle.
A
B
C
D
A
B
C
D
Page 358 of 440

3567-2. Steps to take in an emergency
6Open and close any of the doors of
your vehicle with the engine switch
off.
7 Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
8 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected.
Once the engine starts, have the vehi-
cle inspected at your Lexus dealer as
soon as possible.
■Starting the engine when the battery is
discharged
The engine cannot be started by push-start-
ing.
■To prevent battery discharge
●Turn off the headlights and the audio sys-
tem while the engine is off.
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■Charging the battery
The electricity stored in the battery will dis-
charge gradually even when the vehicle is
not in use, due to natural discharge and the
draining effects of certain electrical appli-
ances. If the vehicle is left for a long time,
the battery may discharge, and the engine
may be unable to start. (The battery
recharges automatically during driving.)
■When recharging or replacing the bat-
tery
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
battery is discharged. Use the wireless
remote control or the mechanical key to
lock or unlock the doors.
●The engine may not start on the first
attempt after the battery has recharged
but will start normally after the second
attempt. This is not a malfunction.
●The engine switch mode is memorized by
the vehicle. When the battery is recon-
nected, the system will return to the
mode it was in before the battery was dis-
charged. Before disconnecting the bat-
tery, turn the engine switch off. If you are
unsure what mode th e engine switch was
in before the battery discharged, be
especially careful when reconnecting the
battery.
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the bat-
tery:
●Make sure each jumper cable is con-
nected to the correct terminal and that
it is not unintentionally in contact with
any other than the intended terminal.
●Do not allow the other end of the
jumper cable connected to the “+” ter-
minal to come into contact with any
other parts or meta l surfaces in the
area, such as brackets or unpainted
metal.
●Do not allow the + and - clamps of the
jumper cables to come into contact
with each other.
●Do not smoke, use matches, cigarette
lighters or allow open flame near the
battery.
■Battery precautions
The battery contains poisonous and cor-
rosive acidic electrol yte, while related
parts contain lead and lead compounds.
Observe the following precautions when
handling the battery:
Page 359 of 440

3577-2. Steps to take in an emergency
7
When trouble arises
1Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.
2 If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
3 After the engine has cooled down
sufficiently, inspect the hoses and
radiator core (radiator) for any
leaks.
WARNING
●When working with the battery, always
wear safety glasses and take care not
to allow any battery fluids (acid) to
come into contact with skin, clothing
or the vehicle body.
●Do not lean over the battery.
●In the event that battery fluid comes
into contact with the skin or eyes,
immediately wash the affected area
with water and seek medical attention.
Place a wet sponge or cloth over the
affected area until medical attention
can be received.
●Always wash your hands after handling
the battery support, terminals, and
other battery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fans or engine drive
belt.
If your vehicle overheats
The following may indicate that
your vehicle is overheating.
The needle of the engine coolant
temperature gauge ( P.69)
enters the red zone or a loss of
engine power is experienced.
(For example, the vehicle speed
does not increase.)
“Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” is shown on the
multi-information display.
Steam comes out from under the
hood.
Correction procedures
Page 360 of 440
3587-2. Steps to take in an emergency
IS350 AWD/IS350/IS300
AWD/IS300
IS500Radiator
Cooling fans
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4 The coolant level is satisfactory if it
is between the “FULL” or “F” and
“LOW” or “L” lines on the reservoir.
Engine (IS350
AWD/IS350/IS300 AWD) Reservoir cap
“FULL” line
“LOW” line
Engine (IS300)
Reservoir cap
“FULL” line
“LOW” line
Engine (IS500)
Reservoir cap
“FULL” line
“LOW” line
A
B
A
B
C
A
B
C
A
B
C
Page 361 of 440

3597-2. Steps to take in an emergency
7
When trouble arises
Intercooler (IS300)Reservoir cap
“F” line
“L” line
5 Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Engine (IS350
AWD/IS350/IS300 AWD)
Engine (IS300)
Engine (IS500)
Intercooler (IS300)
6 Start the engine and turn the air
conditioning system on to check
that the radiator cooling fans oper-
ate and to check for coolant leaks
from the radiator or hoses.
The fans operate when the air conditioning
system is turned on immediately after a
cold start. Confirm that the fans are oper-
ating by checking the fan sound and air
flow. If it is difficult to check these, turn the
air conditioning system on and off repeat-
edly. (The fans may not operate in freezing
temperatures.)
7 If the fans are not operating:
Stop the engine immediately and
contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the
nearest Lexus dealer.
8 Check if “Engine Coolant Temp
High Stop in a Safe Place See
Owner’s Manual” is shown on the
A
B
C
Page 362 of 440

3607-2. Steps to take in an emergency
multi-information display.
If the message does not disappear:
Stop the engine and contact your
Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the
nearest Lexus dealer.
WARNING
■When inspecting under the hood of
your vehicle
Observe the following precautions.
Failure to do so may result in serious
injury such as burns.
●If steam is seen coming from under the
hood, do not open the hood until the
steam has subsided. The engine com-
partment may be very hot.
●Keep hands and clothing (especially a
tie, a scarf or a muffler) away from the
fans and belts.
Failure to do so may cause the hands
or clothing to be caught, resulting in
serious injury.
●IS350 AWD/IS350/IS300 AWD:
Do not loosen the coolant inlet cap or
coolant reservoir cap while the engine
and radiator are hot. (The coolant inlet
cap is located under the engine cover.)
High temperature steam or coolant
could spray out.
●IS300: Do not loosen the coolant inlet
cap, coolant reservoir cap, or inter-
cooler reservoir cap while the engine
and radiator are hot. High tempera-
ture steam or coolant could spray out.
●IS500: Do not loosen the coolant inlet
cap or coolant reservoir cap while the
engine and radiator are hot. High tem-
perature steam or coolant could spray
out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has
cooled down sufficiently. Adding cool
coolant to a hot engine too quickly can
cause damage to the engine.
■To prevent damage to the cooling sys-
tem
Observe the following precautions:
●Avoid contaminating the coolant with
foreign matter (such as sand or dust
etc.).
Page 363 of 440
3617-2. Steps to take in an emergency
7
When trouble arises
1Stop the engine. Set the parking
brake and shift the shift lever to P.
2 Remove the mud, snow or sand
from around the rear wheels.
3 Place wood, stones or some other
material under the rear wheels to
help provide traction.
4 Restart the engine.
5 Shift the shift lever to D or R and
release the parking brake. Then,
while exercising caution, depress
the accelerator pedal.
■When it is difficult to free the vehicle
Press the switch to turn off TRAC.
NOTICE
●Do not use any coolant additive.
If the vehicle becomes stuck
Carry out the following proce-
dures if the tires spin or the vehicle
becomes stuck in mud, dirt or snow:
Recovering procedure
Page 366 of 440

3648-1. Specifications
8-1.Specifications
*1: IS350 AWD/IS350/IS300 AWD/IS300
*2:IS500
*3: Unladen vehicles
*4:2WD models
*5:AWD models
*6: Vehicles with 235/45R18 or 235/40R19 rear tires
*7: Vehicles with 265/35R19 rear tires
■Vehicle identification number
The vehicle identification number
(VIN) is the legal identifier for your
vehicle. This is the primary identifica-
tion number for your Lexus. It is used in registering the ownership of your vehi-
cle.
This number is stamped on the top left
of the instrument panel and in the
engine compartment.
Maintenance data (fuel, oil level, etc.)
Dimensions and weight
Overall length185.4 in. (4710 mm)*1
187.3 in. (4758 mm)*2
Overall width72.4 in. (1840 mm)
Overall height*356.5 in. (1435 mm)*4
56.7 in. (1440 mm)*5
Wheelbase110.2 in. (2800 mm)
Tread*1
Front62.2 in. (1580 mm)
Rear63.0 in. (1600 mm)*6
61.8 in. (1570 mm)*7
Vehicle capacity weight
(Occupants + luggage)825 lb. (375 kg)
Seating capacity
Seating capacity5 (Front 2, Rear 3)
Vehicle identification