Page 547 of 680
5477-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_OM_USA_OM78082U
Attach the cover.Align the 2 tabs positions and
close the cover.
Fix the cover by pushing the
center of the clip.
Install the engine compartment cover. ( P. 5 0 3 )
■Rear turn signal lights
Open the back door and attach
protective tape around the lamp
body. (Use masking tape, do not
use Duct tape, as duct tape may
leave markings.)
Remove the cover.
It is recommended for safeguarding
to wrap the tip of the screwdriver
with a cloth, etc., in order to prevent
scratches to the vehicle.
Remove the 2 bolts.
8
1
2
9
1
2
3
Page 550 of 680
5507-3. Do-it-yourself maintenance
NX300h_OM_USA_OM78082U
Install the 2 bolts.
Install the cover.
■Back-up lights Open the back door and remove
the cover.
Press down on the notch on the
cover and remove the cover.
It is recommended for safeguarding
to wrap the tip of the screwdriver
with a cloth, etc., in order to prevent
scratches to the vehicle.
Turn the bulb base counterclock-
wise.
10
11
1
2
Page 552 of 680

5527-3. Do-it-yourself maintenance
NX300h_OM_USA_OM78082U
■Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by your Lexus
dealer.
●Headlight low beams
●Headlight high beams (LED type)
●Front turn signal lights (LED type)
●Parking lights and Daytime running lights
●Front fog lights
●Front side marker lights (LED type)
●Side turn signal lights
●Stop/tail lights
●Rear side marker lights
●High mounted stoplight
●License plate lights
●Outer foot lights
■After replacing the bulbs
■LED lights
The headlight low beams, headlight high beams (LED Type), front turn signal lights (LED
Type), parking lights, daytime running lights, front fog lights, front side marker lights (LED
Type), side turn signal lights, rear side ma rker lights, stop/tail lights, rear side marker
lights, high mounted stoplight and license plate lights, outer foot lights consist of a num-
ber of LEDs. If any of the LEDs burn out, take your vehicle to your Lexus dealer to have
the light replaced.
■Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a
malfunction. Contact your Lexus dealer for mo re information in the following situations:
●Large drops of water have built up on the inside of the lens.
●Wa t e r h a s b u i l t u p i nside the headlight.
■When replacing light bulbs
P. 5 3 6
After removing the engine compartment cover,
return the cover to original position with the
clips.
Insert
Press
1
2
Page 553 of 680

5537-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_OM_USA_OM78082U
WA R N I N G
■Replacing light bulbs
●Be sure to stop the hybrid system and turn off the lights. Do not attempt to replace the
bulb immediately after turning off the lights.
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. When it is unavoid-
able to hold the glass portion, use and hold with a clean dry cloth to avoid getting
moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so may result
in heat damage, fire, or water entering the headlight unit. This may damage the head-
lights or cause condensation to build up on the lens.
●Do not attempt to repair or disassemble light bulbs, connectors, electric circuits or
component parts.
Doing so may result in death or se rious injury due to electric shock.
■To prevent damage or fire
●Make sure bulbs are fully seated and locked.
●Check the wattage of the bulb before installin g to prevent heat damage.
Page 556 of 680
5568-1. Essential information
NX300h_OM_USA_OM78082U
Emergency flashers
Press the switch.
All the turn signal lights will flash. To turn
them off, press the switch once again.
■Emergency flashers
If the emergency flashers are used for a long time while the hybrid system is not operat-
ing (while the “READY” indicator is not illu minated), the 12-volt battery may discharge.
The emergency flashers are used to warn other drivers when the vehicle has
to be stopped in the road due to a breakdown, etc.
Page 565 of 680

565
8
When trouble arises
8-2. Steps to take in an emergency
NX300h_OM_USA_OM78082U
If a warning light turns on or a warning buzzer
sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, bu t then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(U.S.A.)
(Canada)
Brake system warning light Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
Immediately stop the vehicle in a safe place and contact your
Lexus dealer. Continuing to drive the vehicle may be dangerous.
*1Charging system warning light
Indicates a malfunction in the vehicle’s charging system
Immediately stop the vehicle in a safe place and contact your
Lexus dealer. Continuing to drive the vehicle may be dangerous.
*1Low engine oil pressure warning light (warning buzzer)
Indicates that the engine oil pressure is too low
Immediately stop the vehicle in a safe place and contact your
Lexus dealer. Continuing to drive the vehicle may be dangerous.
*1High coolant temperature warning light (warning buzzer)
Indicates that the engine is overheating
Immediately stop the vehicle in a safe place. Continuing to drive
the vehicle may be dangerous.
Handling method ( P. 5 9 9 )
Brake system warning light
Indicates a malfunction in:
• The regenerative braking system;
• The electronically controlled brake system; or
• The electric parking brake
Have the vehicle inspected by your Lexus dealer immediately.
(U.S.A.)
(Canada)
Malfunction indicator lamp Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system;
• The electronic throttle control system; or
• The emission control system
Have the vehicle inspected by your Lexus dealer immediately.
Page 570 of 680

5708-2. Steps to take in an emergency
NX300h_OM_USA_OM78082U
WA R N I N G
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The vehi-
cle will become extremely unstable during braking, and the ABS system may fail, which
could cause an accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
When the light comes on yellow, the assist to the power steering is restricted. When the
light comes on red, the assist to the power steering is lost and handling operations of
the steering wheel become extremely heavy. When steering wheel operations are
heavier than usual, grip the steering wheel firmly and operate it using more force than
usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
Page 572 of 680

5728-2. Steps to take in an emergency
NX300h_OM_USA_OM78082U
If a warning message is displayed
Master warning light
The master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.
Multi-information display
Handling Method
Follow the instructio ns of the message
on the multi-information display.
If any of the warning messages are show n again after the following actions have
been performed, contact your Lexus dealer.
The warning lights and warning buzzers operate as follows depending on the
content of the message. If a message in dicates the need for inspection by a
dealer, have the vehicle inspected by your Lexus dealer immediately.
The multi-information display shows warnings of system malfunctions, incor-
rectly performed operations, and messages that indicate a need for mainte-
nance. When a message is shown, perform the correction procedure
appropriate to the message.
1
2
3
Messages and warnings
System
warning light
Wa r n i n g b u z z e r*Wa r n i n g
Comes on
Sounds Indicates an important situation, such
as when a system related to driving is
malfunctioning or that danger may
result if the correction procedure is not
performed
Comes on
or flashesSounds
Indicates an important situation, such
as when the systems shown on the
multi-information display may be mal-
functioning
FlashesSounds
Indicates a situation, such as when
damage to the vehicle or danger may
result