LEXUS NX300 2020 Service Manual

411-1. For safe use
LEXUS NX300 Owners Manual_USA_M78389_en
1
For safety and security
SRS warning light
Front passenger’s seat belt reminder light
For the U.S.A.
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light
For Canada“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light
Front passenger occupant classification system
Your vehicle is equipped with a front passenger occupant classification sys-
tem. This system detects the conditions of the front passenger seat and acti-
vates or deactivates the front passenger airbag and seat cushion airbag in the
front passenger side.
System components
A
B
C
D
E
F

421-1. For safe use
LEXUS NX300 Owners Manual_USA_M78389_en
■Adult*1
■Child*4
Condition and operation in the front passenger occupant classification
system
Indicator/warning
light
“AIR BAG ON” and “AIR BAG OFF” indica- tor lights“AIR BAG ON”
SRS warning lightOff
Front passenger’s seat belt reminder lightOff*2 or flashing*3
Devices
Front passenger airbag
ActivatedSide airbag on the front passenger seat
Curtain shield airbag in the front passenger
side
Seat cushion airbag in the front passenger sideActivated *2 or deac-
tivated
*3
Front passenger’s seat belt pretensioner and force limiterActivated
Indicator/warning light
“AIR BAG ON” and “AIR BAG OFF” indica- tor lights“AIR BAG OFF” or
“AIR BAG ON”
*4
SRS warning lightOff
Front passenger’s seat belt reminder lightOff*2 or flashing*3
Devices
Front passenger airbagDeactivated or acti-
vated
*4
Side airbag on the front passenger seat
ActivatedCurtain shield airbag in the front passenger
side
Seat cushion airbag in the front passenger sideDeactivated or acti-
vated
*2, 4
Front passenger’s seat belt pretensioner and force limiterActivated

431-1. For safe use
LEXUS NX300 Owners Manual_USA_M78389_en
1
For safety and security
■Child restraint system with infant*5
■Unoccupied
Indicator/warning
light
“AIR BAG ON” and “AIR BAG OFF” indica- tor lights“AIR BAG OFF” *6
SRS warning lightOff
Front passenger’s seat belt reminder lightOff*2 or flashing*3
Devices
Front passenger airbagDeactivated
Side airbag on the front passenger seat
ActivatedCurtain shield airbag in the front passenger
side
Seat cushion airbag in the front passenger sideDeactivated
Front passenger’s seat belt pretensioner and force limiterActivated
Indicator/warning light
“AIR BAG ON” and “AIR BAG OFF” indica- tor lights“AIR BAG OFF”
SRS warning lightOffFront passenger’s seat belt reminder light
Devices
Front passenger airbagDeactivated
Side airbag on the front passenger seat
ActivatedCurtain shield airbag in the front passenger
side
Seat cushion airbag in the front passenger sideDeactivated
Front passenger’s seat belt pretensioner and force limiterActivated

441-1. For safe use
LEXUS NX300 Owners Manual_USA_M78389_en
■There is a malfunction in the system
*1: The system judges a person of adult size as an adult. When a smaller adult sits in the
front passenger seat, the system may not re cognize him/her as an adult depending on
his/her physique and posture.
*2: In the event the front passenger is wearing a seat belt.
*3: In the event the front passenger does not wear a seat belt.
*4: For some children, child in se at, child in booster seat or child in convertible seat, the sys-
tem may not recognize him/her as a child. Factors which may affect this can be the phy-
sique or posture.
*5: Never install a rear-facing ch ild restraint system on the front passenger seat. A forward-
facing child restraint system sh ould only be installed on the front passenger seat when it
is unavoidable. ( P.51)
*6: In case the indicator light is not illuminated, consult this manual on how to install the child
restraint system properly. ( P.48)
Indicator/warning
light
“AIR BAG ON” and “AIR BAG OFF” indica- tor lights“AIR BAG OFF”
SRS warning lightOnFront passenger’s seat belt reminder light
Devices
Front passenger airbagDeactivated
Side airbag on the front passenger seat
ActivatedCurtain shield airbag in the front passenger
side
Seat cushion airbag in the front passenger sideDeactivated
Front passenger’s seat belt pretensioner and force limiterActivated

451-1. For safe use
LEXUS NX300 Owners Manual_USA_M78389_en
1
For safety and security
WARNING
■Front passenger occupant classifica-
tion system precautions
Observe the following precautions
regarding the front passenger occupant
classification system. Failure to do so may
cause death or serious injury.
●Wear the seat belt properly.
●Make sure the fron t 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” indi-
cator light is not illuminated when
using the seat belt extender for the
front passenger seat. If the “AIR BAG
OFF” indicator light is illuminated, dis-
connect 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 illumi-
nated. 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 serious
injury in the event of a collision.
●Do not apply a heavy load to the front
passenger seat or equipment (e.g.
seatback pocket).
●Do not put weight on the front passen-
ger 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 pas-
senger seat.
●Do not recline the front passenger
seatback so far that it touches a rear
seat. This may cause the “AIR BAG
OFF” indicator light to be illuminated,
which indicates that the SRS airbags
for the front passenger will not activate
in the event 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 effectiveness of the
seat belt system.
●If an adult sits in the front passenger
seat, the “AIR BAG ON” indicator
light is illuminated. 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 co rrectly. If the “AIR
BAG OFF” indicator still remains illu-
minated, either ask the passenger to
move to the rear seat, or if that is not
possible, move the front passenger
seat fully rearward.
●When it is unavoidable to install a for-
ward-facing child restraint system on
the front passenger seat, install the
child restraint system on the front pas-
senger seat in the proper order.
(  P.51)
●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
indicate a malfunction of the front pas-
senger occupant clas sification system.
In this case, contact your Lexus dealer
immediately.
●Child restraint systems installed on the
rear seat should not contact the front
seatbacks.
●Do not use a seat accessory, such as a
cushion and seat cover, that covers the
seat cushion surface.

461-1. For safe use
LEXUS NX300 Owners Manual_USA_M78389_en
WARNING
●Do not modify or replace the uphol-
stery of the front seat.
Exhaust gas precautions
Harmful substance to the human
body is contained in exhaust gases
if inhaled.
WARNING
Exhaust gases contain harmful carbon
monoxide (CO), which is colorless and
odorless. Observe the following precau-
tions.
Failure to do so may cause exhaust gases
to enter the vehicle and may lead to an
accident caused by light-deadness, 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 vehi-
cle even when the back door is closed,
open the windows and have the vehi-
cle 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 engine.
●Do not leave the vehicle with the
engine running 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 engine running in an
area with snow build-up, or where it is
snowing. If snowbanks build up around
the vehicle while the engine is running,
exhaust gases may collect and enter
the vehicle.

471-1. For safe use
LEXUS NX300 Owners Manual_USA_M78389_en
1
For safety and security
WARNING
■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.

481-2. Child safety
LEXUS NX300 Owners Manual_USA_M78389_en
1-2.Child safety
Points to remember: P.48
Child restraint system: P.50
When using a child restraint system:
 P.51
Child restraint system installation
method
• Fixed with a seat belt: P.52
• Fixed with a child restraint LATCH anchor: P.57
• Using an anchor bracket (for top tether strap): P.58
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 warn-
ings, as well as the laws and regula-
Riding with children
Observe the following precautions
when children are in the vehicle.
Use a child restraint system appro-
priate for the child , until the child
becomes large enough to properly
wear the vehicle’s seat belt.
 It is recommended that children
sit in the rear seats to avoid acci-
dental contact with the shift lever,
wiper switch, etc.
 Use the rear door child-protector
lock or the window lock switch to
avoid children opening the door
while driving or operating the
power window accidentally.
( P.103, 139)
 Do not let small children operate
equipment which may catch or
pinch body parts, such as the
power window, hood, back door,
seats, etc.
WARNING
■When children are in the vehicle
Never leave children unattended in the
vehicle, and never allow children to have
or use the key.
Children may be able to start the vehicle
or shift the vehicle into neutral. There is
also a danger that children may injure
themselves by playing with the windows,
the moon roof (if eq uipped) or other fea-
tures of the vehicle. In addition, heat
build-up or extremely cold temperatures
inside the vehicle can be fatal to children.
Child restraint systems
Before installing a child restraint
system in the vehicle, there are pre-
cautions that need to be observed,
different types of child restraint sys-
tems, as well as installation meth-
ods, 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, install the child restraint
system to a rear seat. Be sure to fol-
low the installation method that is in
the operation manual enclosed with
the restraint system.
Table of contents
Points to remember

491-2. Child safety
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1
For safety and security
tions 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
suits your vehicle and is appropriate
to the age and size of the child.
WARNING
■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 system
which is correctly installed. For installa-
tion details, refer to the operation man-
ual enclosed with the child restraint
system. General insta llation instruction
is provided in this manual.
●Lexus strongly urges the use of a
proper child restraint system that con-
forms to the weight and size of the
child, installed on the rear seat.
According to accident statistics, the
child is safer when properly restrained
in the rear seat than in the front seat.
●Holding a child in your or someone
else’s arms is not a substitute for a child
restraint system. In an accident, the
child can be crushed against the wind-
shield or between the holder and the
interior of the vehicle.
■Handling the child restraint system
If the child re straint system is not prop-
erly fixed in place, the child or other pas-
sengers may be seriously injured or even
killed in the event of sudden braking, sud-
den swerving, or an accident.
●If the vehicle were to receive a strong
impact from an accident, etc., it is pos-
sible that the child restraint system has
damage that is not readily visible. In
such cases, do not reuse the restraint
system.
●Make sure you have complied with all
installation instructions provided with
the child restraint system manufac-
turer and that the system is properly
secured.
●Keep the child rest raint system prop-
erly secured on the seat even if it is not
in use. Do not store the child restraint
system unsecured in the passenger
compartment.
●If it is necessary to detach the child
restraint system, remove it from the
vehicle or store it securely in the lug-
gage compartment.

501-2. Child safety
LEXUS NX300 Owners Manual_USA_M78389_en
■Types of child restraint system installation methods
Confirm with the operation manual enclosed with the child restraint system about
the installation of the child restraint system.
Child restraint system
Installation methodPage
Seat belt attachmentP.52
Child restraint
LATCH anchors attachment
P.57
Anchor brackets (for top tether strap) attachment
P.58