2021 LEXUS NX300h battery

1063-1. Key information
LEXUS NX300h Owners Manual_USA_M78578_en
3-1.Key information
The following keys are provided with
the vehicle.
Electronic keys
• Operating the smart access system with push-button start ( P.126)
• Operating the wireless remote control function
Mechanical keys
Key number plate
Card key (electronic key) (if
equipped)
Operating the smart access system with
push-button start ( P.126)
■Card key (if equipped)
●The mechanical key that is stored inside
the card key should be used only if a
problem arises, such as when the card
key does not operate properly.
●If the battery cover is not installed and the
battery falls out or if the battery was
removed because the key got wet, rein-
stall the battery with the positive terminal
facing the Lexus emblem.
●The card key is not waterproof.
■When riding in an aircraft
When bringing an electronic key onto an
aircraft, make sure you do not press any
buttons on the electronic key while inside
the aircraft cabin. If you are carrying an
electronic key in your bag, etc., ensure that
the buttons are not likely to be pressed acci-
dentally. Pressing a button may cause the
electronic key to emit radio waves that
could interfere with the operation of the air-
craft.
■Electronic key battery depletion
●The standard battery life is 1 to 2 years.
(The card key battery life is about a year
and a half.)
●If the battery becomes low, an alarm will
sound in the cabin wh en the hybrid sys-
tem stops.
●As the electronic key always receives
radio waves, the battery will become
depleted even if the electronic key is not
used. The following symptoms indicate
that the electronic key battery may be
depleted. Replace the battery when nec-
essary.
• The smart access system with push-but- ton start or the wireless remote control
does not operate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
●To avoid serious dete rioration, do not
leave the electronic key within 3 ft. (1 m)
of the following electrical appliances that
produce a magnetic field:
Keys
Key types
A
B
C
D

1073-1. Key information
LEXUS NX300h Owners Manual_USA_M78578_en
3
Before driving
•TVs
• Personal computers
• Cellular phones, cordless phones and
battery chargers
• Recharging cellular phones or cordless
phones
• Induction cookers
• Table lamps
■Replacing the battery
 P.369
■Confirmation of the registered key
number
The number of keys already registered to
the vehicle can be confirmed. Ask your
Lexus dealer for details.
The electronic keys are equipped with
NOTICE
■To prevent key damage
●Do not drop the keys, subject them to
strong shocks or bend them.
●Do not expose the keys to high tem-
peratures for long periods of time.
●Do not get the keys wet or wash them
in an ultrasonic washer, etc.
●Do not attach metallic or magnetic
materials to the keys or place the keys
close to such materials.
●Do not disassemb le the keys.
●Do not attach a sticker or anything else
to the surface of the electronic key.
●Do not place the keys near objects that
produce magnetic fields, such as TVs,
audio systems and induction cookers,
or medical electrical equipment, such
as low-frequency therapy equipment.
■Carrying the electronic key on your
person
Carry the electronic key 3.9 in. (10 cm)
or more away from electric appliances
that are turned on. Radio waves emitted
from electric applianc es within 3.9 in. (10
cm) of the electronic key may interfere
with the key, causing the key to not func-
tion properly.
■In case of a smart access system with
push-button start malfunction or
other key related problems
 P.412
■When an electronic key is lost
 P.411
■Handling the card key
●If the battery or card key terminals get
wet, the battery may corrode and the
card key may stop working.
If the key is dropped into water, or if
drinking water, etc., is spilled on the
key, immediately remove the battery
cover and wipe the battery and termi-
nals. (To remove the battery cover,
lightly grasp and pull it.) If the battery is
corroded, have your Lexus dealer
replace the battery.
●Do not crush the battery cover or use
a screwdriver to remove the battery
cover.
Forcibly removing the battery cover
may bend or damage the key.
●If the battery cover is frequently
removed, the battery cover may
become loose.
●When installing the battery, make sure
to check the direction of the battery.
Installing the battery in the wrong
direction may cause the battery to
deplete rapidly.
●The surface of the card key may be
damaged, or its coating may peel off in
the following situations:
• The card key is ca rried together with
hard objects, such as coins and keys.
• The card key is scraped with a sharp object, such as the tip of a mechanical
pencil.
• The surface of the card key is wiped with thinner or benzene.
Wireless remote control

1083-1. Key information
LEXUS NX300h Owners Manual_USA_M78578_en
the following wireless remote control:
Locks all the doors ( P.110)
Unlocks all the doors ( P.110)
Opens the windows and moon
roof
*1, 2 (  P.110)
Opens and closes the power back
door
*1 (  P.117)
Sounds the alarm ( P.108)
*1: If equipped
*2: This setting must be customized at your
Lexus dealer.
■Theft deterrent panic mode
When is pressed for longer than
about 1 second, an alarm will sound inter-
mittently and the vehicle lights will flash to
deter any person from trying to break into
or damage your vehicle.
To stop the alarm, press any button on the
electronic key.
■Back door reserve lock function (vehi-
cles with power back door)
This function is a function which reserves
locking of all doors, beforehand, when the
back door is open. When the follow is done,
all the doors except the back door are
locked and then back door will also be
locked at the same time it is closed.
1 Close all doors, except the back door.
2 Push the wireless lock button during the
automatic closing operation of the back
door.
To take out the mechanical key, push
the release button and take the key out.
The mechanical key can only be inserted in
one direction, as the key only has grooves
on one side. If the key cannot be inserted in
a lock cylinder, turn it over and re-attempt
to insert it.
After using the mechanical key, store it in
the electronic key. Carry the mechanical
key together with the electronic key. If the
electronic key battery is depleted or the
entry function does not operate properly,
you will need the mechanical key.
(  P.412)
A
B
C
D
E
Using the mechanical key

1123-2. Opening, closing and locking the doors
LEXUS NX300h Owners Manual_USA_M78578_en
■Door lock buzzer
If an attempt to lock the doors is made when
a door is not fully closed, a buzzer sounds
continuously for 5 seconds. Fully close the
door to stop the buzzer, and lock the vehi-
cle once more.
■Setting the alarm
Locking the doors will set the alarm system.
(  P.77)
■Conditions affecting the operation of
the smart access system with push-but-
ton start or wireless remote control
 P.128
■If the smart access system with push-
button start or the wireless remote con-
trol does not operate properly
●Use the mechanical key to lock and
unlock the doors. ( P.412)
●Replace the key battery with a new one if
it is depleted.
■Customization
Settings (e.g. unloc king function using a
key) can be changed. (Customizable fea-
tures:  P.443)
■Using the door lock switches
1 Locks all the doors
2 Unlocks all the doors
WARNING
■To prevent an accident
Observe the following precautions while
driving the vehicle.
Failure to do so may result in a door
opening and an occupant falling out,
resulting in death or serious injury.
●Ensure that all doors are properly
closed and locked.
●Do not pull the inside handle of the
doors while driving.
Be especially care ful for the front
doors, as the door s may be opened
even if the inside lock buttons are in
locked position.
●Set the rear door ch ild-protector locks
when children are seated in the rear
seats.
■When opening or closing a door
Check the surroundings of the vehicle
such as whether the vehicle is on an
incline, whether there is enough space
for a door to open and whether a strong
wind is blowing. When opening or clos-
ing the door, hold the door handle tightly
to prepare for any unpredictable move-
ment.
■When using the wireless remote con-
trol and operating the power windows
or moon roof (if equipped)
Operate the power window or moon
roof after checking to make sure that
there is no possibility of any passenger
having any of their body parts caught in
the window or moon roof. Also do not let
a child operate window by the mechani-
cal key. It is possible for children and
other passengers to get caught in the
power window or moon roof.
Unlocking and locking the doors
from the inside

1213-2. Opening, closing and locking the doors
LEXUS NX300h Owners Manual_USA_M78578_en
3
Before driving
●When the vehicle is parked in a place
where objects such as plants are near the
rear bumper
●If luggage, etc. is set near the rear
bumper
●If accessories or a vehicle cover is
installed/removed near the rear bumper
●When the vehicle is being towed
To prevent unintentional operation, turn the
kick sensor operation setting off.
■When reconnecting the 12-volt battery
To enable the power back door to operate
properly, close the back door manually.
■Jam protection function
Sensors are installed in the right and left
sides of the power back door. When the
door is automatically closing and the sen-
sors are pushed due to an object being
clamped, etc., the jam protection function
operates.
From that position the door automatically
moves a little in the opposite direction and
then the function stops.
■If the back door opener is inoperative
The back door can be unlocked from the
inside.
1 Remove the cover.
To protect the cover, place a rag between
the flathead screwdriver and the cover as
shown in the illustration. 2
Move the lever.
■Customization
Settings (e.g. back door automatic open
and stop position) can be changed. (Cus-
tomizable features: P.443)
WARNING
■Back door closer
●In the event that the back door is left
slightly open, the back door closer will
automatically close it to the fully closed
position. It take s several seconds
before the back door closer begins to
operate. Be careful not to catch fingers
or anything else in the back door, as
this may cause bone fractures or other
serious injuries.
●Use caution when using the back door
closer as it still operates when the
power back door system is canceled.

1223-2. Opening, closing and locking the doors
LEXUS NX300h Owners Manual_USA_M78578_en
WARNING
■Power back door
Observe the following precautions when
operating the power back door.
Failure to do so may cause death or seri-
ous injury.
●Check the safety of the surrounding
area to make sure there are no obsta-
cles or anything that could cause any
of your belongings to get caught.
●If anyone is in the vicinity, make sure
they are safe and let them know that
the back door is about to open or
close.
●If the power back door system is
turned off with the main switch while
the back door is operating automati-
cally, the automatic operation is
stopped. The back door then has to be
operated manually. Take extra care
when on an incline, as the back door
may open or close unexpectedly.
●If the operating conditions of the
power back door are no longer met, a
buzzer may sound and the back door
may stop opening or closing. The back
door then has to be operated manu-
ally. Take extra care when on an incline,
as the back door may open or close
abruptly.
●On an incline, the back door may sud-
denly shut after it opens. Make sure
the back door is fully open and secure.
●In the following situations, the power
back door may detect an abnormality
and automatic operation may be
stopped. In this case, the back door
has to be operated manually. Take
extra care when on an incline, as the
back door may open or close abruptly.
• When the back door contacts an obstacle
• When the 12-volt battery voltage sud- denly drops, such as when the power
switch is turned to power ON mode or
the hybrid system is started during
automatic operation
●If a bicycle carrier or similar heavy
object is attached to the back door, the
power back door may not operate,
causing itself to malfunction, or the
back door may suddenly shut again
after being opened, causing some-
one’s hands, head or neck to be caught
and injured. When installing an acces-
sory part to the back door, using a
genuine Lexus part is recommended.
■Jam protection function
Observe the following precautions.
Failure to do so may cause death or seri-
ous injury.
●Never use any part of your body to
intentionally activa te the jam protec-
tion function.
●The jam protection function may not
work if something gets caught just
before the back door fully closes. Be
careful not to catch fingers caught or
anything else.
●The jam protection function may not
work depending on the shape of the
object that is caught. Be careful not to
catch fingers or anything else.
■Kick sensor (vehicles with Hands
Free Power Back Door)
Observe the following precautions when
operating the power back door.
Failure to do so may cause death or seri-
ous injury.
●Check the safety of the surrounding
area to make sure there are no obsta-
cles or anything that could cause any
of your belongings to get caught.
●When putting your foot near the lower
center part of the rear bumper and
moving it from the rear bumper, be
careful not to touch the exhaust pipes
until they have cooled down suffi-
ciently, as touching hot exhaust pipes
can cause burns.
●Do not operate the Hands Free Power
Back Door if there is little space under
the rear bumper.

1273-2. Opening, closing and locking the doors
LEXUS NX300h Owners Manual_USA_M78578_en
3
Before driving
■Effective range (areas within which the
electronic key is detected)
When locking or unlocking the doors
The system can be operated when the
electronic key is within about 2.3 ft. (0.7
m) of an outside door handle. (Only the
doors detecting the key can be oper-
ated.)
When starting the hybrid system or
changing power switch modes
The system can be operated when the elec-
tronic key is inside the vehicle.
■If an alarm sounds or a warning message
is displayed
A combination of exterior and interior
alarms as well as warning messages shown
on the multi-information display are used to
prevent theft of the vehicle and accidents
resulting from erroneous operation. Take
appropriate measures in response to any
warning message on the multi-information
display. ( P.398)
When only an alarm sounds, circumstances
and correction procedures are as follows.
●When an exterior alarm sounds once for
5 seconds
●When an Interior alarm pings repeatedly
■When “Smart Access System Malfunc-
tion See Owner’s Manual” will be dis-
played on the multi-information display
The system may be ma lfunctioning. Have
the vehicle inspected by your Lexus dealer
immediately.
■Battery-saving function
The battery-saving function will be acti-
vated in order to prevent the electronic key
battery and the 12-volt battery from being
discharged while the vehicle is not in opera-
tion for a long time.
●In the following situations, the smart
access system with pu sh-button start may
take some time to unlock the doors.
• The electronic key has been left in an area of approximately 6 ft. (2 m) of the
outside of the vehicle for 10 minutes or
longer.
• The smart access system with push-but- ton start has not been used for 5 days or
longer.
●If the smart access system with push-but-
ton start has not been used for 14 days or
longer, the doors cann ot be unlocked at
any doors except the dr iver’s door. In this
case, take hold of the driver’s door han-
dle, or use the wireless remote control or
the mechanical key, to unlock the doors.
■Turning an electronic key to battery-
saving mode
When battery-saving mode is set, battery
depletion is minimized by stopping the elec-
SituationCorrection proce- dure
An attempt was
made to lock the
vehicle while a door was open.Close all of the
doors and lock the doors again.
A
B
SituationCorrection proce- dure
The power switch was turned to
ACCESSORY mode while the
driver’s door was
open (The driver’s door was opened when the power switch was in
ACCESSORY mode).
Turn the power
switch off and close the driver’s door.

1283-2. Opening, closing and locking the doors
LEXUS NX300h Owners Manual_USA_M78578_en
tronic key from re
ceiving radio waves.
Press twice while pressing and
holding .
Confirm that the elec tronic key indicator
flashes 4 times. While the battery-saving
mode is set, the smar t access system with
push-button start cannot be used. To cancel
the function, press any of the electronic key
buttons.
■Conditions affe cting operation
The smart access system with push-button
start, wireless remote control and immobi-
lizer system use weak radio waves. In the
following situations, the communication
between the electronic key and the vehicle
may be affected, preventing the smart
access system with push -button start, wire-
less remote control and immobilizer system
from operating properly. (Ways of coping:
 P.412)
●When the electronic key battery is
depleted
●Near a TV tower, electric power plant,
gas station, radio stat ion, large display,
airport or other faci lity that generates
strong radio waves or electrical noise
●When the electronic key is in contact
with, or is covered by the following metal-
lic objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil
inside
• Metallic wallets or bags
•Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
●When other wireless ke ys (that emit radio
waves) are being used nearby
●When carrying the electronic key together with the following devices that
emit radio waves
• Portable radio, cellular phone, cordless
phone or other wireless communication
devices
• Another vehicle’s electronic key or a
wireless key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic content or
metallic objects are attached to the rear
window
●When the electronic key is placed near a
battery charger or electronic devices
■Note for the entry function
●Even when the electronic key is within the
effective range (detection areas), the sys-
tem may not operate properly in the fol-
lowing cases:
• The electronic key is too close to the win-
dow or outside door handle, near the
ground, or in a high place when the doors
are locked or unlocked.
• The electronic key is near the ground or in a high place, or too close to the rear
bumper center when the back door is
opened.
• The electronic key is on the instrument panel, luggage room, floor, or in the door
pockets or glove box when the hybrid
system is started or power switch modes
are changed.
●Do not leave the electronic key on top of
the instrument panel or near the door
pockets when exiting the vehicle.
Depending on the radio wave reception
conditions, it may be detected by the
antenna outside the cabin and the door
will become lockable from the outside,
possibly trapping the electronic key
inside the vehicle.
●As long as the electronic key is within the
effective range, the doors may be locked
or unlocked by anyone.
●Even if the electronic key is not inside the
vehicle, it may be po ssible to start the
hybrid system if the el ectronic key is near
the window.
●The doors may unlock if a large amount