Page 430 of 532
4287-2. Steps to take in an emergency
RX450h
1 Secure the deck board using the
hook. ( P.326)
2 Remove the spare tire cover.
3 Loosen the center fastener that
secures the spare tire.
RX450hL
1 Remove the deck board.
2 Remove the cover. 3
Attach the adapter socket to the
spare tire clamp bolt.
4 Assemble the jack handle exten-
sion.
5 Connect the jack handle to the
adapter socket. Turn the jack han-
dle counterclockwise.
The tire will be lowered completely to the
ground.
Turn the jack handle slowly to lower the
spare tire. If the handle is turned quickly,
the wire cable may come off the shaft
inside the unit and the tire may not be low-
ered.
If the spare tire cannot be lowered:
Taking out the spare tire
Page 432 of 532

4307-2. Steps to take in an emergency
2Slightly loosen the wheel nuts (one
turn).
For vehicles with wheel lock nuts, loosen
the wheel lock nut first.
3Turn 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.
4Raise 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
avoid scratching the wheel surface.
■If the spare tire cannot be lowered
(RX450hL)
If the spare tire cannot be lowered, it may
not have been stowed properly. Perform the
following procedure:
1 Fully tighten the spare tire clamp bolt by
turning the jack handle clockwise until
two clicks are heard and the jack handle
skips.
Flat tireWheel chock posi-
tions
Front left-hand sideBehind the rear
right-hand side tire
Front right-hand
sideBehind the rear
left-hand side tire
Rear left-hand sideIn front of the front
right-hand side tire
Rear right-hand sideIn front of the front
left-hand side tire
A
Page 433 of 532

4317-2. Steps to take in an emergency
7
When trouble arises
2Turn the jack handle counterclockwise
to lower the spare tire.
If the spare tire still cannot be lowered,
attempt to fully tighten the spare tire clamp
bolt again by turning the jack handle clock-
wise. Then turn it coun terclockwise at least
2 turns to lower the spare tire.
If the spare tire still cannot be lowered, the
wire cable may be seve red. Have the vehi-
cle inspected by your Lexus dealer.
1 Remove any dirt or foreign matter
from the wheel contact surface.
If foreign matter is on the wheel contact
surface, the wheel nuts may loosen while
the vehicle is in motion, causing the tire to
WARNING
■Replacing a flat tire
●Do not touch the disc wheels or the
area around the brakes immediately
after the vehicle has been driven. After
the vehicle has been driven the disc
wheels and the area around the brakes
will be extremely hot. Touching these
areas with hands, feet or other body
parts while changing a tire, etc. may
result in burns.
●Failure to follow these precautions
could cause the wheel nuts to loosen
and the tire to fall of f, 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 an accident and
resulting in death or serious injury.
Remove any oil or grease from the
wheel bolts or wheel nuts.
• Have the wheel nuts tightened with a torque wrench to 76 ft•lbf (103 N•m,
10.5 kgf•m) as soon as possible after
changing wheels.
• 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.
●Observe the following precautions.
(RX450hL)
Failure to do so may result in serious
injury:
• Do not try to remove the wheel orna- ment by hand. Take due care in han-
dling the orname nt to avoid
unexpected personal injury.
• Lower the spare tire completely to the ground before removing it from under
the vehicle.
■Replacing a flat tire for vehicles with
power back door
In cases such as when replacing tires,
make sure to turn off the power back
door main switch ( P.472). Failure to do
so may cause the back door to operate
unintentionally if th e power back door
switch is accidentally touched, resulting
in hands and fingers being caught and
injured.
Installing the spare tire
Page 434 of 532

4327-2. Steps to take in an emergency
come off.
2Install the spare tire and loosely
tighten each wheel nut by hand by
approximately the same amount.
Tighten the wheel nuts until the tapered
portion comes into loose contact with the
disc wheel seat.
Tapered portion
Disc wheel seat
3 Lower the vehicle.
4 Firmly tighten each wheel nut two
or three times in the order shown in
the illustration.
For vehicles with wheel lock nuts, tighten the wheel lock nut last.
Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
5
RX450h: Stow the flat tire, tire jack
and all tools.
RX450hL: P.432
1 Remove the center wheel orna-
ment by pushing from the reverse
side.
Be careful not to lose the wheel ornament.
2Stand the tire against the bumper
with the inner surface facing
toward you. Pass the hoist assembly
A
B
WARNING
■Stowing the flat tire
Failure to follow st eps listed under stow-
ing the tire may result in damage to the
spare tire carrier and loss of the tire,
which could result in serious injury or
death.
Stowing the flat tire, jack and all
tools (RX450hL)
Page 435 of 532
4337-2. Steps to take in an emergency
7
When trouble arises
and holding bracket through
the wheel opening.
3 Fully depress the secondary latch
and install the bracket to the
hoist assembly . 4
Lay the tire on the ground with the
outer surface (valve stem) facing
up.
5 Before raising the tire, make sure
that the hoist assembly is perpen-
dicular to the wheel opening. (Try to
place the tire directly beneath the
vehicle, near where the wire cable
is hanging from.)
Valve stem
6 Using the jack handle and adapter
socket, tighten the tire clamp bolt
by turning it clockwise until the tire
is in the correct position and two
clicks are heard as the jack handle
skips.CB
AB
C
A
Page 438 of 532

4367-2. Steps to take in an emergency
One of the following may be the cause
of the problem:
The electronic key may not be func-
tioning properly. ( P.439)
There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.
There may be a malfunction in the
immobilizer system. ( P.73)
There may be a malfunction in the
steering lock system.
The hybrid system may be malfunc-
tioning due to an electrical problem
such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the hybrid system. ( P.437)
One of the following may be the cause
NOTICE
■Proper storage of the spare tire
(RX450hL)
●If the hoist assembly is slanted when
stowing a tire, the hoist assembly may
become stuck in the wheel opening
and the tire may not be raised properly,
causing damage to the wheel or the
wire cable.
●If the spare tire clamp bolt is turned
without a tire on the hoist assembly, the
wire cable may not be able to be low-
ered. If the wire cable cannot be low-
ered, contact your Lexus dealer.
If the hybrid system will not
start
Reasons for the hybrid system not
starting vary depending on the situ-
ation. Check the following and per-
form the appropriate procedure:
The hybrid system will not start
even though the correct starting
procedure is being followed.
( P.182)
The interior lights and head-
lights are dim, or the horn does
not sound or sounds at a low vol-
ume.
Page 441 of 532

4397-2. Steps to take in an emergency
7
When trouble arises
fuel tank. Therefore, fill the fuel tank
carefully and slowly.
RX450hL
If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, remove the cover inside
the luggage compartment using a
tool, such as a flathead screwdriver,
and pull the lever to open the fuel
filler door.
When using a screwdri ver, make sure to
wrap its tip with tape to protect the cover.
Using the lever to open the fuel filler
door may not allow for an adequate
reduction in fuel tank pressure
before refueling. To prevent fuel
from spilling out, turn the cap slowly
when removing it.
During refueling, fuel may spill out
from the filler opening due to air
being discharged from inside the
fuel tank. Therefore, fill the fuel tank
carefully and slowly.
■When the electronic key does not work
properly
●Make sure that the smart access system
with push-button star t has not been dis-
abled at your Lexus dealer. If it has been
disabled, re-enable it.
●Check if battery-saving mo de is set. If it is
set, cancel the function. ( P.126)
■Unlocking the door
Use the mechanical key ( P.107) in
order to perform the following opera-
tions:
If the electronic key does not
operate properly
If communication between the
electronic key and vehicle is inter-
rupted ( P.126) or the electronic
key cannot be used because the
battery is depleted, the smart
access system with push-button
start and wireless remote control
cannot be used. In such cases, the
doors can be opened and the hybrid
system can be started by following
the procedure below.
NOTICE
■In case of a smart access system with
push-button start malfunction or
other key-rela ted problems
Take your vehicle with all the electronic
keys provided with your vehicle to your
Lexus dealer.
Locking and unlocking the doors
Page 442 of 532

4407-2. Steps to take in an emergency
1Insert the mechanical key while
pulling on the driver’s door handle.
2 Unlock the door.
Turning the key rearward unlocks the
driver’s door. Turning the key again unlocks
the other doors.
3Remove the key, return the handle,
and then pull the handle again.
■Locking the door
1 With the door open, push down the
inside lock button.
2 Close the door.
■Key linked functions
1 Closes the windows and the moon
roof
* or panoramic moon roof* (turn
and hold)
2 Opens the windows and the moon
roof
* or panoramic moon roof* (turn
and hold)
These settings must be customized at your
Lexus dealer.
*: If equipped
1 Ensure that the shift lever is in P and
depress the brake pedal.
2 Touch the Lexus emblem side of the
electronic key to the power switch.
When the electronic key is detected, a
buzzer sounds and the power switch will
turn to ON mode.
WARNING
■When using the mechanical key and
operating the power windows or the
moon roof or panoramic moon roof
Operate the power window or the moon
roof or panoramic moon roof after
checking to make sure that there is no
possibility of any passe nger having any of
their body parts caught in the window or
the moon roof or panoramic moon roof.
Also, do not allow children to operate the
mechanical key. It is possible for children
and other passengers to get caught in
the power window or the moon roof or
panoramic moon roof.
Starting the hybrid system