2018 LEXUS RX450h belt

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For safety and security
1
RX450h_RX450hL _U_OM48F85U 1-1. For safe use
Before driving................................. 28
For safe driving .............................. 30
Seat belts .......................................... 32
SRS airbags ..................................... 36
Front passenger occupant
classification system.................. 47
Exhaust gas precautions ............ 53
1-2. Child safety
Riding with children ..................... 54
Child restraint systems ............... 55
1-3. Hybrid system
Hybrid system features............... 74
Hybrid system precautions ....... 78
1-4. Theft deterrent system
Immobilizer system ......................83
Alarm ................................................. 86

30 1-1. For safe use
RX450h_RX450hL _U_OM48F85UAdjust the angle of the seatback so
that you are sitting straight up and so
that you do not have to lean forward
to steer. ( → P. 167)
Adjust the seat so that you can
depress the pedals fully and so that
your arms bend slightly at the elbow
when gripping the steering wheel.
( → P. 167)
Lock the head restraint in place with th e center of the head restraint closest to
the top of your ears. ( → P. 186)
Wear the seat belt correctly. ( → P. 32)
Make sure that all occupants are wearing their seat belts before driving the vehi-
cle. ( → P. 32)
Use a child restraint system appropriate for the child until the child becomes
large enough to properly wear the vehicle’s seat belt. ( → P. 55)
Make sure that you can see backward clea rly by adjusting the inside and outside
rear view mirrors properly. ( → P. 191, 193)For safe driving For safe driving, adjust the seat and mi rror to an appropriate position before
driving.
Correct driving posture 1
2
Correct use of the seat belts
Adjusting the mirrors 3
4

32 1-1. For safe use
RX450h_RX450hL _U_OM48F85U●
Extend the shoulder belt so that it
comes fully over the shoulder, but
does not come into contact with the
neck or slide off the shoulder. ●
Position the lap belt as low as possi-
ble over the hips. ●
Adjust the position of the seatback.
Sit up straight and well back in the
seat. ●
Do not twist the seat belt.
To fasten the seat belt, push the plate
into the buckle until a click sound is
heard.
To release the seat belt, press the
release button.
Push the seat belt shoulder anchor
down while pressing the release but-
ton.
Push the seat belt shoulder anchor
up. Move the height adjuster up and down
as needed until you hear a click.Seat belts Make sure that all occupants are wearin g their seat belts before driving the
vehicle.
Correct use of the seat belts
Fastening and releasing the seat belt
Release button1
2
Adjusting the seat belt shoulder anchor height (front seats)
Release button1
2

331-1. For safe use
1
For safety and security
RX450h_RX450hL _U_OM48F85UThe pretensioners help the seat belts to
quickly restrain the occupants by
retracting the seat belts when the vehi-
cle is subjected to certain types of
severe frontal or side collision or a vehi-
cle rollover. The pretensioners do not activate in the
event of a minor frontal impact, a minor
side impact or a rear impact. ■
Emergency locking retractor (ELR)
The retractor will lock th e belt during a sudden stop or on impact. It may also lock if you
lean forward too quickly. A slow, easy motion w ill allow the belt to ex tend so that you can
move around fully. ■
Automatic locking retractor (ALR)
When a passenger’s shoulder belt is completely extended and then retracted even
slightly, the belt is locked in that position and cannot be extended. This feature is used to
hold the child restraint system (CRS) firmly. To free the belt again, fully retract the belt
and then pull the belt out once more. ( → P. 57)■
Child seat belt usage
The seat belts of your vehicle were principally designed for persons of adult size. ●
Use a child restraint system appropriate fo r the child, until the child becomes large
enough to properly wear the vehicle’s seat belt. ( → P. 55)●
When the child becomes large enough to properly wear the vehicle’s seat belt, follow
the instructions regardin g seat belt usage. ( → P. 32)■
Replacing the belt after the pr etensioner has been activated
If the vehicle is involved in multiple collisions, the pretensioner will activate for the first
collision, but will not activate for th e second or subsequent collisions.■
Seat belt extenderSeat belt pretensioners (front seats and outboard second-row seats)
If your seat belts cannot be fastened securely
because they are not long enough, a personal-
ized seat belt extender is available from your
Lexus dealer free of charge.

34 1-1. For safe use
RX450h_RX450hL _U_OM48F85UWARNING
Observe the following precautions to reduce the risk of injury in the event of sudden
braking, sudden swerving or an accident.
Failing to do so may cause death or serious injury. ■
Wearing a seat belt ●
Ensure that all passeng ers wear a seat belt.●
Always wear a seat belt properly. ●
Each seat belt should be used by one person only. Do not use a seat belt for more
than one person at once, including children. ●
Lexus recommends that ch ildren be seated in the rear seat and always use a seat belt
and/or an appropriate child restraint system. ●
To achieve a proper seating position, do not recline the seat more than necessary. The
seat belt is most effective when the occupa nts are sitting up stra ight and well back in
the seats. ●
Do not wear the shoulder belt under your arm. ●
Always wear your seat belt low and snug across your hips.
■
Pregnant women ●
RX450hL: Do not let third-row seat passen-
gers to use second-row seat seat belts.
Obtain medical advice and wear the seat belt
in the proper way. ( → P. 32)
Women who are pregnant should position the
lap belt as low as possible over the hips in the
same manner as other occupants, extending
the shoulder belt completely over the shoulder
and avoiding belt contact with the rounding of
the abdominal area.
If the seat belt is not worn properly, not only the
pregnant woman, but also the fetus could suffer
death or serious injury as a result of sudden
braking or a collision.

351-1. For safe use
1
For safety and security
RX450h_RX450hL _U_OM48F85UWARNING ■
People suffering illness
Obtain medical advice and wear the seat belt in the proper way. ( → P. 32)■
When children are in the vehicle
→ P. 66 ■
Seat belt pretensioners ●
Do not place anything, such as a cushion, on the front passenger’s seat. Doing so will
disperse the passenger’s weight, which prevents the sensor from detecting the pas-
senger’s weight properly. As a result, the seat belt pretensioner for the front passen-
ger’s seat may not activate in the event of a collision. ●
If the pretensioner has activated, the SRS wa rning light will come on. In that case, the
seat belt cannot be used again and must be replaced at your Lexus dealer. ■
Adjustable shoulder anchor
Always make sure the shoulder belt is posi tioned across the center of your shoulder.
The belt should be kept away from your neck , but not falling off your shoulder. Failure to
do so could reduce the amount of protection in an accident and cause death or serious
injuries in the event of a sudden stop, sudden swerve or accident. ( → P. 32)■
Seat belt damage and wear ●
Do not damage the seat belts by allowing th e belt, plate, or buckle to be jammed in
the door. ●
Inspect the seat belt system periodically. Check for cuts, fraying, and loose parts. Do
not use a damaged seat belt until it is replaced. Damaged seat belts cannot protect an
occupant from death or serious injury. ●
Ensure that the belt and plate are locked and the belt is not twisted.
If the seat belt does not function correct ly, immediately contact your Lexus dealer.●
Replace the seat assembly, incl uding the belts, if your vehi cle has been involved in a
serious accident, even if there’s no obvious damage. ●
Do not attempt to install, remove, modify, disassemble or dispose of the seat belts.
Have any necessary repairs carried out by your Lexus dealer. Inappropriate handling
may lead to inco rrect operation.■
Using a seat belt extender ●
Do not wear the seat belt extender if you can fasten the seat belt without the extender. ●
Do not use the seat belt extender when in stalling a child restrain t system because the
belt will not securely hold the child restra int system, increasing the risk of death or
serious injury in the event of an accident. ●
The personalized extender may not be safe on another vehicle, when used by another
person, or at a different seating position other than the one originally intended.
NOTICE ■
When releasing a seat belt extender
When releasing the seat belt, press on the buckle release button on the extender, not
on the seat belt.
This helps prevent damage to the vehicle interior and the extender itself.

36 1-1. For safe use
RX450h_RX450hL _U_OM48F85U 
RX450h
SRS airbags The SRS airbags inflate when the vehi cle is subjected to certain types of
severe impacts that may ca use significant injury to the occupants. They work
together with the seat belts to help redu ce the risk of death or serious injury.

38 1-1. For safe use
RX450h_RX450hL _U_OM48F85UYour vehicle is equipped with ADVA NCED AIRBAGS designed based on the
US motor vehicle safety standards (F MVSS208). The airbag sensor assembly
(ECU) controls airbag deployment based on information obtained from the sen-
sors etc. shown in the system compon ents diagram above. This information
includes crash severity and occupant information. As the airbags deploy, a
chemical reaction in the inflators quickly fills the airbags with non-toxic gas to
help restrain the motion of the occupants.SRS airbag system components
Front passenger airbag
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Front side airbags
Curtain shield airbags
Side impact sensors (rear)
SRS warning light
Front passenger occupant classifica-
tion system (ECU and sensors)
Driver airbag
Side impact sensors (front door) Seat belt pretensioners and force
limiters
Passenger seat cushion airbag
Driver’s seat position sensor
Driver’s knee airbag
Driver’s seat belt buckle switch
Front passenger’s seat belt buckle
switch
Front impact sensors
Airbag sensor assembly
Rear side airbags1
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5
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