emergency LEXUS RX450H 2019 Workshop Manual

6768-2. Steps to take in an emergency
RX450h_RX450hL_U
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 purpose ot her than replacing tires or installing and
removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do no t use other tire jacks for replacing 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 hybrid system or drive the vehicle while the vehicle is supported by
the jack.
●Do not raise the vehicle while someone is inside.
●When raising the vehicle, do not pu t 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.
●When lowering the vehicle, make sure that there is no-one near the vehicle. If there
are people nearby, warn them vocally before lowering.

6778-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
When replacing tires on a vehicle with wheel lock nuts, use the following proce-
dures to remove and install the wheel lock nuts. The wheel lock key is stored in
the tray inside the luggage compartment. Always return the wheel lock key to its
original position after use, so that it does not get lost.
■Removal
For ease of removal, the wheel lock nut should always be the first one loos-
ened.
Place the wheel lock key on top of th e wheel lock nut, turning until the
wheel lock key and wheel lock nut patterns engage.
Place the wheel nut wrench on the wheel lock key, and while applying pres-
sure on the wheel lock key, loosen the wheel lock nut.
■Installation
For ease of installation, the wheel lock nut should always be the last one tight-
ened.
By hand, install a wheel lock nut on each wheel.
Place the wheel lock key on top of th e wheel lock nut, turning until the
wheel lock key and wheel lock nut patterns engage.
Place the wheel nut wrench on the wheel lock key, and while applying pres-
sure on the wheel lock key, tighten the wheel lock nut to the recommended
torque.
Wheel lock nut (if equipped)
NOTICE
Do not use an impact wrench. Using an impact wrench may cause permanent damage
to wheel lock nut and wheel lock key. If in doubt about wheel lock application, contact
your Lexus dealer.
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2
1
2
3

6788-2. Steps to take in an emergency
RX450h_RX450hL_U
Secure the deck board using the hook. (P. 544)
Disengage the hook and take out
the jack.
RX450h: Remove the wheel nut
wrench and then the jack
RX450hL: Remove th e jack handle and
then the jack
RX450h
Secure the deck board using the hook. ( P. 544)
Remove the spare tire cover.
Loosen the center fastener that
secures the spare tire.
Taking out the jack
1
2
Taking out the spare tire
1
2
3

6798-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
RX450hL
Remove the deck board.
Remove the cover.
Attach the adapter socket to the
spare tire clamp bolt.
Assemble the jack handle extension.
Connect the jack handle to the
adapter socket. Turn the jack handle
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
lowered.
If the spare tire cannot be lowered: P. 682
1
2
3
4
5

6808-2. Steps to take in an emergency
RX450h_RX450hL_U
Pull out the spare tire and stand it
against the bumper.
Fully depress the secondary latch and remove the holding bracket
from the hoist assembly .
Tilt the bracket and pass it
through the wheel opening. Then
remove the hoist assembly .6
7
A
BC
8B
C
WARNING
■When storing the spare tire
Be careful not to catch fingers or other body parts between the spare tire and the body
of the vehicle.

6818-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
Chock the tires.
Slightly loosen the wheel nuts (one
turn).
For vehicles with wheel lock nuts, loosen
the wheel lock nut first.
Turn the tire jack portion by hand
until the notch of the jack is in con-
tact with the jack point.
The jack point guides are located under
the rocker panel. They indicate the jack
point positions.
Replacing a flat tire
1
Flat tireWheel chock positions
FrontLeft-hand sideBehind the rear right-hand side tire
Right-hand sideBehind the rear left-hand side tire
RearLeft-hand sideIn front of the front right-hand side tire
Right-hand sideIn front of the front left-hand side tire
2
3A

6828-2. Steps to take in an emergency
RX450h_RX450hL_U
Raise the vehicle until the tire is
slightly raised off the ground.
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:
If the spare tire still cannot be lowered, the wire cable may be severed. Have the vehicle
inspected by your Lexus dealer.
4
5
Fully tighten the spare tire clamp bolt by turn-
ing the jack handle clockwise until two clicks
are heard and the jack handle skips.
Turn 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 counterclockwise at least 2
turns to lower the spare tire.1
2

6838-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
WARNING
■When holding a tire with Selectable Color Trim (if equipped)
■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 cau se 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, leading 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 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 ornament by hand. Take due care in handling the ornament 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. 112). Failure to do so may cause the back door to operate unintentionally if
the power back door switch is accidentally touched, re sulting in hands and fingers
being caught and injured.
Do not hold the tire by the Selectable Color
Trim. Otherwise, the Selectable Color Trim
may be damaged or may fall off causing the tire
to drop, possibly causing injury.

6848-2. Steps to take in an emergency
RX450h_RX450hL_U
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 come off.
Install 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.
Lower the vehicle.
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)
RX450h: Stow the flat tire, tire jack and all tools.
RX450hL:  P. 685
Installing the spare tire
1
Disc wheel
seat
Tapered portion2
3
4
5

6858-2. Steps to take in an emergency
8
When trouble arises
RX450h_RX450hL_U
Remove the center wheel ornament by pushing from the reverse side.
Be careful not to lose the wheel ornament.
Stand the tire against the bumper
with the inner surface facing toward
you. Pass the hoist assembly and
holding bracket through the
wheel opening.
Fully depress the secondary latch and install the bracket to the
hoist assembly .
WARNING
■Stowing the flat tire
Failure to follow steps listed under stow ing the tire may result in damage to
the spare tire carrier and loss of the ti re, which could result in serious injury
or death.
Stowing the flat tire, jack and all tools (RX450hL)
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2
C
B
3
AB
C