Lexus IS350 2021 Owner's Manual / LEXUS 2021 IS 300, IS 350 OWNER'S MANUAL (OM53E98U)

3216-3. Do-it-yourself maintenance
6
Maintenance and care
Check the wattage of the light bulb to
be replaced. (P.381)
Light bulbs
You may replace the following bulbs
by yourself. The difficulty level of
replacement varies depending on
the bulb. If necessary bulb replace-
ment seems difficult to perform,
contact your Lexus dealer.
For more information about replac-
ing other light bulbs, contact your
Lexus dealer.
Preparing for light bulb replace-
ment

3226-3. Do-it-yourself maintenance
Front turn signal light (bulb type)
Rear turn signal light
■Replacing the following bulbs
If any of the lights listed below has
burnt out, have it replaced by your
Lexus dealer.
 Headlight
 Parking lights and daytime running
lights
 Front turn signal lights (LED type)
 Side marker lights
 Side turn signal lights
 Stop/tail lights
 Tail lights
 Back-up light
 High mounted stoplight
 License plate lights
■LED Lights
The lights other than the front turn signal
lights (bulb type) and rear turn signal lights
each consist of a number 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 indi-
cate a malfunction. Contact your Lexus
dealer for more information in the following
situations:
●Large drops of water have built up on the
inside of the lens.
●Water has built up inside the headlight.
■When replacing light bulbs
 P.319
Bulb locations
A
B

3236-3. Do-it-yourself maintenance
6
Maintenance and care
■Front turn signal lights (bulb type)
1 For the left side only: Pinch the clip
to remove the washer fluid filler
opening.
2 Turn the bulb base counterclock-
wise.
3 Remove the light bulb.
4 Install a new light bulb then install
the bulb base to the light unit by
inserting it and turning the bulb
base clockwise.
After installing the light bulb, turn on the
front turn signal light to visually check that
there is no light leaking from the bulb base.
5 After replacing the left side bulb,
install the washer fluid filler opening
to its original position.
■Rear turn signal lights
1 Open the trunk and apply protec-
tive tape to the vehicle body around
the light unit.
Use masking tape, etc. Do not use duct
tape, as it may leave residue or damage the
paint when removed.
2Insert a flathead screw-driver
between the cover and the light unit
and pry up the cover in several
positions as shown in the illustration
to disengage the claws (indicated
by a dotted line).
To prevent scratching the vehicle, wrap the
tip of the flathead scre wdriver with a cloth,
Replacing light bulbs

3246-3. Do-it-yourself maintenance
etc.
3Pull the cover toward the rear of the
vehicle to remove it.
4 Remove the 2 bolts. 5
Pull the light unit toward the rear of
the vehicle to remove it.
6 Turn the bulb base counterclock-
wise.
7 Remove the light bulb.
8 Install a new light bulb and then
install the bulb base to the light unit

3256-3. Do-it-yourself maintenance
6
Maintenance and care
by inserting it and turning it clock-
wise.
9 Install the light unit.
Align the tabs and push the light unit
toward the front of the vehicle to install it.
10Install the 2 bolts. 11
Install the cover.
12 Remove the protective tape.
■When replacing the front turn signal
lights (bulb type)
When the washer fluid filler opening is
removed with a large amount of washer
fluid contained in the washer tank, washer
fluid may spill onto the vehicle and cleaning
may be required.
WARNING
■Replacing light bulbs
●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
unavoidable 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 he adlight unit. This
may damage the headlights or cause
condensation to build up on the lens.
■To prevent damage or fire
●Make sure bulbs are fully seated and
locked.

3266-3. Do-it-yourself maintenance
WARNING
●Check the wattage of the bulb before
installing to prevent heat damage.

327
7
7
When trouble arises
When trouble arises
.7-1. Essential informationEmergency flashers.................. 328
If your vehicle has to be stopped in an emergency .......................... 328
If the vehicle is trapped in rising water............................................ 329
7-2. Steps to take in an emergency If your vehicle needs to be towed......................................................... 331
If you think something is wrong ........................................................ 335
Fuel pump shut off system ..... 336
If a warning light turns on or a warning buzzer sounds ....... 337
If a warning message is displayed ........................................................ 346
If you have a flat tire.................. 349
If the engine wi ll not start .......357
If you lose your keys ................. 358
If the fuel filler door cannot be opened........................................ 359
If the electronic key does not operate properly .................... 359
If the vehicle battery is discharged ......................................................... 361
If your vehicle overheats ........ 365
If the vehicle becomes stuck ........................................................ 368

3287-1. Essential information
7-1.Essential information
Press the switch to flash all of the turn
signal lights.
To turn them off, press the switch once
again.
■Emergency flashers
●If the emergency flashers are used for a
long time while the engine is not operat-
ing, the battery may discharge.
●If any of the SRS airbags deploy (inflate)
or in the event of a strong rear impact, the
emergency flashers will turn on automati-
cally.
The emergency flashers will turn off auto-
matically after operating for approxi-
mately 20 minutes. To manually turn the
emergency flashers off, press the switch
twice.
(The emergency flashers may not turn on
automatically depending on the force of
the impact and conditions of the colli-
sion.)
1 Steadily step on the brake pedal
with both feet and firmly depress it.
Do not pump the brake pedal repeatedly
as this will increase the effort required to
slow the vehicle.
2Shift the shift lever to N.
If the shift lever is shifted to N
3 After slowing down, stop the vehi-
cle in a safe place by the road.
4 Stop the engine.
If the shift lever cannot be shifted to
N
3 Keep depressing the brake pedal
with both feet to reduce vehicle
speed as much as possible.
4 To stop the engine, press and hold
the engine switch for 2 consecutive
Emergency flashers
The emergency flashers are used to
warn other drivers when the vehicle
has to be stopped on the road due
to a breakdown, etc.
Operating instructions
If your vehicle has to be
stopped in an emergency
Only in an emergency, such as if it
becomes impossible to stop the
vehicle in the normal way, stop the
vehicle using the following proce-
dure:
Stopping the vehicle

3297-1. Essential information
7
When trouble arises
seconds or more, or press it briefly
3 times or more in succession.
5 Stop the vehicle in a safe place by
the road. 
Remove the seat belt first.
 If the door can be opened, open the
door and exit the vehicle.
 If the door can not be opened, open
the window using the power window
switch and exit the vehicle through
the window.
 If the window can not be opened
using the power window switch,
remain calm, wait until the water
level inside the vehicle rises to the
point that the water pressure inside
of the vehicle equals the water pres-
sure outside of the vehicle, and then
open the door and exit the vehicle.
WARNING
■If the engine has to be turned off while
driving
Power assist for the brakes and steering
wheel will be lost, making the brake
pedal harder to depress and the steering
wheel heavier to turn. Decelerate as
much as possible before turning off the
engine.
If the vehicle is trapped in
rising water
In the event the vehicle is sub-
merged in water, remain calm and
perform the following.
WARNING
■Using an emergency hammer* for
emergency escape
The front side wind ows and rear side
windows, as well as the rear window can
be shattered with an emergency ham-
mer
* used for emergency escape. How-
ever, an emergency hammer* can not
shatter the windshield as it is laminated
glass.
*: Contact your Lexus dealer or after-
market accessory manufacturer for
further information about an emer-
gency hammer.

3307-1. Essential information
WARNING
■Escaping the vehicle from the window
There are cases where escaping the
vehicle from the window is not possible
due to seating position, passenger body
type, etc.
When using an emergency hammer,
consider your seat location and the size
of the window opening to ensure that the
opening is accessible and large enough
to escape.