LEXUS RX450h 2018 Workshop Manual

511-1. For safe use
1
For safety and security
RX450h_RX450hL _U_OM48F85UWARNING ■
Front passenger occupant classification system precautions
Observe the following precau tions regarding the front passenger occupant classifica-
tion system.
Failure to do so may cause death or serious injury. ●
Wear the seat belt properly. ●
Make sure the front passenger’s seat belt plate has not been left inserted into the
buckle before someone sits in the front passenger seat.●
Make sure the “AIR BAG OFF” indicator li ght is not illuminated when using the seat
belt extender for the front passenger seat. If the “AIR BAG OFF” indicator light is illu-
minated, disconnect the extender tongue from the seat belt buckle, and reconnect
the seat belt. Reconnect the seat belt extender after making sure the “AIR BAG ON”
indicator light is illuminated. If you use the seat belt extender while the “AIR BAG
OFF” indicator light is illuminated, the SRS airbags for the front passenger will not
activate, which could cause death or seri ous injury in the event of a collision.●
Do not apply a heavy load to the front pa ssenger seat or equipment (e.g. seatback
pocket). ●
Do not put weight on the front passenger seat by putting your hands or feet on the
front passenger seat seatback from the rear passenger seat.●
Do not let a rear passenger lift the front passenger seat with their feet or press on the
seatback with their legs. ●
Do not put objects under the front passenger seat.

52 1-1. For safe use
RX450h_RX450hL _U_OM48F85UWARNING ■
Front passenger occupant classification system precautions ●
Do not recline the front passeng er seatback so far that it touches a rear seat. This may
cause the “AIR BAG OFF” indicator light to be illuminated, whic h indicates that the
SRS airbags for th e front passenger will no t activate in the even t of a severe accident.
If the seatback touches the rear seat, return the seatback to a position where it does
not touch the rear seat. Keep the front passenger seatback as upright as possible
when the vehicle is moving. Reclining the seatback excessively may lessen the effec-
tiveness of the seat belt system. ●
If an adult sits in the fron t passenger seat , the “AIR BAG ON” indicator light is illumi-
nated. If the “AIR BAG OFF” indicator is illuminated, ask the passenger to sit up
straight, well back in the seat, feet on the floor, and with the seat belt worn correctly. If
the “AIR BAG OFF” indicator still remain s illuminated, either ask the passenger to
move to the rear seat, or if that is not possible, move the fron t passenger seat fully
rearward. ●
When it is unavoidable to in stall a forward-facing child re straint system on the front
passenger seat, install the ch ild restraint system on the front passenger seat in the
proper order. ( → P. 57)●
Do not modify or remove the front seats. ●
Do not kick the front passenger seat or subject it to severe impact. Otherwise, the
SRS warning light may come on to indica te a malfunction of the front passenger
occupant classification system. In this cas e, contact your Lexus dealer immediately.●
Child restraint systems insta lled on the rear se at should not contact the front seat-
backs. ●
Do not use a seat accessory, such as a cushion and seat cover, that covers the seat
cushion surface. ●
Do not modify or replace the upholstery of the front seat. ●
Adjust the front passenger seat so that the head restraint does not touch the ceiling. If
the head restraint is left in contact with the ceiling, the system may not detect the front
passenger properly, leading to improper operation of the airbags.

531-1. For safe use
1
For safety and security
RX450h_RX450hL _U_OM48F85UExhaust gas precautions Harmful substance to the human body is contained in exhaust gases if inhaled.WARNING
Exhaust gases contain harmful carbon monoxi de (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident
caused by light-headedness, or may lead to death or a serious health hazard.■
Important points while driving ●
Keep the back door closed. ●
If you smell exhaust gases in the vehicle even when the back door is closed, open the
windows and have the vehicle inspected at your Lexus dealer as soon as possible.■
When parking ●
If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop the
hybrid system. ●
Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and ensure
that exhaust fumes do not enter the vehicle interior. ●
Do not leave the hybrid system operating in an area with snow build-up, or where it is
snowing. If snowbanks build up around the vehicle while the hybrid system is operat-
ing, exhaust gases may collect and enter the vehicle. ■
Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or crack caused
by corrosion, damage to a joint or abnormal exhaust noise, be sure to have the vehicle
inspected and repaired by your Lexus dealer.

54
RX450h_RX450hL _U_OM48F85U1-2. Child safety
●
It is recommended that children sit in the rear seats to avoid accidental con-
tact with the shift lever, wiper switch, etc. ●
Use the rear door child-pro tector lock or the window lock switch to avoid
children opening the door while driving or operating the power window acci-
dentally. ●
Do not let small children operate equipment which may catch or pinch body
parts, such as the power wind ow, hood, back door, seats etc.
Riding with children Observe the following precautions wh en children are in the vehicle.
Use a child restraint system appropriate for the child, until the child becomes
large enough to properly wear the vehicle’s seat belt.
WARNING
Never leave children unattended in the vehicl e, and never allow child ren to have or use
the key.
Children may be able to start the vehicle or sh ift the vehicle into neutral. There is also a
danger that children may injure themselves by playing with the windows, the moon roof
or panoramic moon roof, or other features of the vehicle. In addition, heat build-up or
extremely cold temperatures inside the vehicle can be fatal to children.

551-2. Child safety
1
For safety and security
RX450h_RX450hL _U_OM48F85UPoints to remember ............................................................................................................. .P. 55
Child restraint system ......................................................................................................... .P. 57
When using a child restraint system .................... .......................................................... P. 59
Child restraint system installation method
• Fixed with a seat belt...................................................................................................P. 61
• Fixed with a child restraint LATCH anchor .. ...................................................P. 67
• Using an anchor bracket (for top tether strap) ............................................. P. 70
The laws of all 50 states of the U.S.A. as well as Canada now require the use of
child restraint systems. ●
Prioritize and observe the warnings, as well as the laws and regulations for
child restraint systems. ●
Use a child restraint system until the child becomes large enough to properly
wear the vehicle’s seat belt. ●
Choose a child restraint system that su its your vehicle and is appropriate to
the age and size of the child.Child restraint systems Before installing a child restraint system in the vehicle, there are precautions
that need to be observed, different type s of child restraint systems, as well as
installation methods, etc., written in this manual.
Use a child restraint system when riding with a small child that cannot properly
use a seat belt. For the child’s safety, in stall the child restraint system to a rear
seat. Be sure to follow the installation method that is in the operation manual
enclosed with the restraint system.
Table of contents
Points to remember

56 1-2. Child safety
RX450h_RX450hL _U_OM48F85UWARNING ■
When a child is riding
Observe the following precautions.
Failure to do so may result in death or serious injury.●
For effective protection in automobile accidents and sudden stops, a child must be
properly restrained, using a seat belt or child restraint syst em which is correctly
installed. For installation details, refer to the operation manual enclosed with the child
restraint system. General in stallation instruction is provided in this manual.●
Lexus strongly urges the use of a proper ch ild restraint system that conforms to the
weight and size of the child, installed on the rear seat. According to accident statistics,
the child is safer when proper ly restrained in the rear se at than in the front seat.●
Holding a child in your or someone else’s ar ms is not a substitute for a child restraint
system. In an accident, the child can be crushed against the windshield or between
the holder and the interior of the vehicle. ■
Handling the child restraint system
If the child restraint system is not properly fixed in place, the child or other passengers
may be seriously injured or even killed in th e event of sudden braking, sudden swerv-
ing, or an accident. ●
If the vehicle were to receive a strong impact from an accident, etc., it is possible that
the child restraint system has da mage that is not readily visible. In such cases, do not
reuse the restraint system. ●
Make sure you have complied with all installa tion instructions prov ided with the child
restraint system manufacturer and th at the system is properly secured.●
Keep the child restraint system properly secure d on the seat even if it is not in use. Do
not store the child restraint system un secured in the passenger compartment.●
If it is necessary to detach the child rest raint system, remove it from the vehicle or
store it securely in the luggage compartment.

571-2. Child safety
1
For safety and security
RX450h_RX450hL _U_OM48F85U■
Types of child restraint system installation methods
Confirm with the operation manual encl osed with the child restraint system
about the installation of the child restraint system.
Child restraint system Installation method Page
Seat belt
attachment P. 61
Child restraint
LATCH
anchors
attachment P. 67

58 1-2. Child safety
RX450h_RX450hL _U_OM48F85UAnchor brack-
ets (for top
tether strap)
attachment 
Second-row seats (RX450h) 
Second-row seats (RX450hL) 
Third-row seats P. 70Installation method Page

591-2. Child safety
1
For safety and security
RX450h_RX450hL _U_OM48F85U■
When installing a child restraint system to a front passenger seat
For the safety of a child, install child restraint systems to second-row seats.
When installing child restraint system to a front passenger seat is unavoidable,
adjust the seat as follows and install the child restraint system. ●
Raise the seatback as much as
possible ●
Move the seat to the rearmost
position ●
Raise the seat to the highest posi-
tion ●
If the head restraint interferes
with the installation of the child
restraint system, and the head
restraint can be removed, remove
the head restraint If the head restraint cannot be removed, raise it to the uppermost position.When using a child restraint system
WARNING ■
When using a child restraint system
Observe the following precautions.
Failure to do so may result in death or serious injury.●
Never install a rear-facing ch ild restraint system on the front passenger seat even if
the “AIR BAG OFF” indicator lig ht is illuminated. In the even t of an accident, the force
of the rapid inflation of the front passenger airbag can cause death or serious injury to
the child if the rear-facing ch ild restraint system is inst alled on the front passenger
seat. ●
A forward-facing child restraint system ma y be installed on the front passenger seat
only when it is unavoidable. A child restraint system that requires a top tether strap
should not be used in the front passenger seat since there is no top tether strap
anchor for the front passenger seat.

60 1-2. Child safety
RX450h_RX450hL _U_OM48F85UWARNING ■
When using a child restraint system
If the head restraint interferes with the inst allation of the child restraint system, and the
head restraint can be removed, remove the head restraint.
If the head restraint cannot be remove d, raise it to the uppermost position.
●
When a booster seat is installed, always en sure that the shoulder belt is positioned
across the center of the child’s shoulder. The belt should be kept away from the child’s
neck, but not so that it coul d fall off the child’s shoulder.●
Use child restraint system suitable to the age and size of the child and install it to the
rear seat. ●
A forward-facing child restraint system may
be installed on the front passenger seat only
when it is unavoidable. When installing a for-
ward-facing child restrain t system on the front
passenger seat, raise the seatback as much as
possible, move the seat to the rearmost posi-
tion, and raise the seat to the highest position,
even if the “AIR BAG OFF” indicator light is
illuminated. ●
Do not allow the child to lean his/her head or
any part of his/her body against the door or
the area of the seat, front or rear pillars, or
roof side rails from which the SRS side air-
bags or SRS curtain shield airbags deploy
even if the child is seat ed in the child restraint
system. It is dangerous if the SRS side airbags
and curtain shield airbags inflate, and the
impact could cause death or serious injury to
the child.
●
If the driver’s seat interferes with the child
restraint system and prevents it from being
attached correctly, atta ch the child restraint
system to the right-hand rear seat. ●
Adjust the front passenger seat so that it does
not interfere with the child restraint system.