2018 LEXUS NX300h Owners Manual

571-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security
4 If the child restraint has a top tether
strap, follow the child restraint man-
ufacturer’s operation manual
regarding the installation, using the
top tether strap to latch onto the
top tether strap anchor. ( → P.57)
5 After installing the child restraint
system, rock it back and forth to
ensure that it is installed securely. ■
Laws and regulations pertaining to
anchors
The LATCH system conforms to
FMVSS225 or CMVSS210.2.
Child restraint systems conforming to
FMVSS213 or CMVSS213 specifications
can be used.
This vehicle is designed to conform to SAE
J1819. ■
Anchor brackets (for top tether
strap)
Anchor brackets are provided for each
rear seat.
Use anchor brackets when fixing the
top tether strap. WARNING■
When installing a child restraint sys-
tem
Observe the following precautions. Fail-
ure to do so may result in death or seri-
ous injury. ●
Shake the child rest raint system left
and right, and forward and backward
to ensure that it has been securely
installed. ●
After securing a child restraint system,
never adjust the seat. ●
When using the LATCH anchors, be
sure that there are no foreign objects
around the anchors and that the seat
belt is not caught behind the child
restraint system. ●
Follow all installation instructions pro-
vided by the child restraint system
manufacturer. ●
When securing some types of child
restraint systems in rear seats, it may
not be possible to properly use the
seat belts in position s next to the child
restraint without interfering with it or
affecting seat belt effectiveness. Be
sure your seat belt fits snugly across
your shoulder and low on your hips. If it
does not, or if it interferes with the
child restraint, move to a different posi-
tion. Failure to do so may result in
death or serious injury.
Using an anchor bracket (for top
tether strap)

58 1-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U Anchor bracket
Anchor bracket for rear center seat
Anchor bracket for rear outboard
seats ■
Fixing the top tether strap to the
anchor bracket
Install the child restraint system in
accordance to the operation manual
enclosed with the child restraint sys-
tem. 
Outboard rear seats
1 Adjust the head restraint to the
upmost position.If the head restraint interferes with the child
restraint system insta llation and the head
restraint can be removed, remove the head
restraint. ( → P.137)
2 Open the anchor bracket cover,
latch the hook onto the anchor
bracket and tighten the top tether
strap.
Make sure the top tether strap is securely latched.
When installing the ch ild restraint system
with the head restraint being raised, be
sure to have the top tether strap pass
underneath the head restraint.
Top tether strap
Hook 
Rear center seat
1 Adjust the head restraint to the
downmost position. If the head restraint interferes with the child
restraint system instal lation and the head
restraint can be remove d, remove the head
restraint. ( → P.137)
2 Open the anchor bracket cover,
latch the hook onto the anchor
bracket and tighten the top tether
strap. Make sure the top tether strap is securely
latched.
When installing the ch ild restraint system
with the head restraint being lower, be sure
to have the top tether strap pass over the A
B
C
A
B

591-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security top of the head restraint.
Top tether strap
Hook ■
Laws and regulations pertaining to
anchors
The LATCH system conforms to
FMVSS225 or CMVSS210.2.
Child restraint systems conforming to
FMVSS213 or CMVSS213 specifications
can be used.
This vehicle is designed to conform to SAE
J1819.
WARNING■
When installing a child restraint sys-
tem
Observe the following precautions. Fail-
ure to do so may result in death or seri-
ous injury. ●
Firmly attach the top tether strap and
make sure that the belt is not twisted.
●
Do not attach the top tether strap to
anything other than the anchor
bracket.
●
Shake the child restraint system left
and right, and forward and backward
to ensure that it has been securely
installed.
●
After securing a child restraint system,
never adjust the seat.
●
Follow all installation instructions pro-
vided by the child restraint system
manufacturer. A
B ●
Outboard rear seats: When installing
the child restraint system with the head
restraint being rais ed, after the head
restraint has been raised and then the
anchor bracket has been fixed, do not
lower the head restraint. ●
Rear center seat: When installing the
child restraint system with the head
restraint being lowered, be sure to
have the top tether strap pass over the
top of the head restraint. If the belt
passes below the head restraint, it is
possible that the child restraint system
may not be securely fixed.
NOTICE■
Anchor brackets (for top tether
strap)
When not in use, make certain to close
the lid. If it remains open, the lid may be
damaged.

60 1-1. For safe use
LEXUS NX300h Owners Manu-
al_USA_OM78212U Exhaust gas precautions Harmful substance to the human
body are 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
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 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 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 operat-
ing in an area with snow build-up, or
where it is snowing. If snowbanks build
up around the vehicle while the hybrid
system is operating, 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.

611-2. Hybrid system
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security 1-2.Hybrid system
The illustration is an example for explanation and may differ from the actual item.
Gasoline engine
Front electric motor (traction motor)
Rear electric motor (traction motor) ■
When stopped/during start off
The gasoline engine stops *
when the
vehicle is stopped. During start off, the
electric motor (traction motor) drives
the vehicle. At slow speeds or when
traveling down a gentle slope, the engine is stopped *
and the electric
motor (traction motor) is used.
When the shift lever is in N, the hybrid
battery (traction battery) is not being
charged. When the vehicle is stopped,
always put the shift lever to P.Hybrid system features Your vehicle is a hybrid vehicle. It has characteristics different from conven-
tional vehicles. Be sure you are closely fa miliar with the characteristics of your
vehicle, and operate it with care.
The hybrid system combines the use of a gasoline engine and an electric
motor (traction motor) according to driving conditions, improving fuel effi-
ciency and reducing exhaust emissions.
System components
A
B
C

62 1-2. Hybrid system
LEXUS NX300h Owners Manu-
al_USA_OM78212U Also, even in heavy traffic conditions,
drive the vehicle in D or S. *
: When the hybrid battery (traction bat-
tery) requires charging or the engine is
warming up, etc., the gasoline engine will
not automatically stop. ( → P.62)■
During normal driving
The gasoline engine is predominantly
used. The electric motor (traction
motor) charges the hybrid battery
(traction battery) as necessary. ■
When accelerating sharply
When the accelerator pedal is
depressed heavily, the power of the
hybrid battery (traction battery) is
added to that of the gasoline engine via
the electric motor (traction motor). ■
When braking (regenerative brak-
ing)
The wheels operate the electric motor
(traction motor) as a power generator,
and the hybrid battery (traction bat-
tery) is charged. ■
Regenerative braking
In the following situations, kinetic energy is
converted to electric energy and decelera-
tion force can be obta ined in conjunction
with the recharging of the hybrid battery
(traction battery).
●
The accelerator pedal is released while
driving with the shift lever in D or S.
●
The brake pedal is depressed while driv-
ing with the shift lever in D or S.
■
EV indicator
The EV indicator comes on when the vehi-
cle is driven using only the electric motor
(traction motor) or th e gasoline engine is
stopped. ■
Conditions in which the gasoline engine
may not stop
The gasoline engine starts and stops auto-
matically. However, it may not stop auto-
matically in the following conditions *
:●
During gasoline engine warm-up ●
During hybrid battery (traction battery)
charging ●
When the temperature of the hybrid bat-
tery (traction battery) is high or low ●
When the heater is switched on *
: Depending on the circumstances, the
gasoline engine may also not stop auto-
matically in other situations. ■
Charging the hybrid battery (traction
battery)
As the gasoline engine charges the hybrid
battery (traction battery), the battery does
not need to be charged from an outside
source. However, if the vehicle is left parked
for a long time the hybrid battery (traction
battery) will slowly discharge. For this rea-
son, be sure to drive the vehicle at least
once every few months for at least 30 min-
utes or 10 miles (16 km ). If the hybrid bat-
tery (traction battery) becomes fully
discharged and you are unable to start the
hybrid system, contact your Lexus dealer.
■
Charging the 12-volt battery
→ P.392
■
After the 12-volt battery has discharged
or when the terminal has been removed
and installed during exchange, etc.
The gasoline engine may not stop even if
the vehicle is being driven by the hybrid bat-
tery (traction battery). If this continues for a
few days, contact your Lexus dealer.

631-2. Hybrid system
LEXUS NX300h Owners Manu-
al_USA_OM78212U 1
For safety and security ■
Sounds and vibrations specific to a
hybrid vehicle
There may be no engine sound or vibration
even though the vehicle is able to move with
the “READY” indicator is illuminated. For
safety, make sure to sh ift the shift lever to P
and apply the parking brake when parked.
The following sounds or vibrations may
occur when the hybrid system is operating
and are not a malfunction: ●
Motor sounds may be heard from the
engine compartment.●
Sounds may be heard from the hybrid
battery (traction battery) behind the rear
seats when the hybrid system starts or
stops.●
Relay operating sounds such as a snap or
soft clank will be emitted from the hybrid
battery (traction batter y), behind the rear
seats, when the hybrid system is started
or stopped.●
Sounds from the hybrid system may be
heard when the back door is open.●
Sounds may be heard from the transmis-
sion when the gasoline engine starts or
stops, when driving at low speeds, or
during idling.●
Engine sounds may be heard when
accelerating sharply.●
Sounds may be heard due to regenera-
tive braking when the brake pedal is
depressed or as the accelerator pedal is
released.●
Vibration may be felt when the gasoline
engine starts or stops.●
Cooling fan sounds may be heard from
the air intake vents under the rear seats.
■
Maintenance, repair, recycling, and dis-
posal
Contact your Lexus dealer regarding main-
tenance, repair, recycling and disposal. Do
not dispose of the vehicle yourself.
■
Customization
Settings (e.g. on/off operation of the EV
indicator) can be changed.
(Customizable features: → P.419) When driving with the gasoline engine
stopped, a sound, which changes in
accordance with the driving speed, will
be played in order to warn people
nearby of the vehicle’s approach. The
sound will stop when the vehicle speed
exceeds approximately 15 mph (25
km/h). ■
Vehicle proximity notification system
In the following cases, the vehicle proximity
notification system may be difficult for sur-
rounding people to hear. ●
In very noisy areas ●
In the wind or the rain
Also, as the vehicle proximity notification
system is installed on the front of the vehicle,
it may be more difficult to hear from the rear
of the vehicle compared to the front.Vehicle proximity notification
system

64 1-2. Hybrid system
LEXUS NX300h Owners Manu-
al_USA_OM78212U The illustration is an example for explanation and may differ from the actual item.
Warning label
Hybrid battery (traction battery)
Rear electric motor (traction motor)
Service plug
High voltage cables (orange)
Front electric motor (traction motor)
Power control unit
Air conditioning compressor
■
Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started, refuel the
vehicle with at least enough gasoline to
make the low fuel level warning light Hybrid system precautions Take care when handling the hybrid sy stem, as it is a high voltage system
(about 650 V at maximum) as well as contains parts that become extremely
hot when the hybrid system is operating. Obey the warning labels attached to
the vehicle.
System components
A
B
C
D
E
F
G
H