wheel LEXUS RX350 2020 Owners Manual

4648-1. Specifications
Your Lexus dealer will help answer any
questions you may have as you read this
information.
■DOT quality grades
All passenger vehicle tires must con-
form to Federal Safety Requirements in
addition to these grades. Quality
grades can be found where applicable
on the tire sidewall between tread
shoulder and maximum section width.
For example: Treadwear 200 Traction AA
Temperature A
■Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled condi-
tions on a specified government test
course.
For example, a tire graded 150 would wear
one and a half (1 - 1/2) times as well on the
government course as a tire graded 100.
The relative performa nce of tires depends
upon the actual conditions of their use.
Performance may differ significantly from
the norm due to variatio ns in driving habits,
service practices and differences in road
characteristics and climate.
■Traction AA, A, B, C
The traction grades, from highest to
lowest, are AA, A, B and C, and they
represent the tire’s ability to stop on
wet pavement as measured under con-
trolled conditions on specified govern-
ment test surfaces of asphalt and
concrete.
A tire marked C may have poor traction
performance.
Warning: The traction grade assigned to
this tire is based on braking (straight ahead) traction tests and does not include
cornering (turning) traction.
■Temperature A, B, C
The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudd en tire failure.
Grade C corresponds to a level of perfor-
mance which all passenger car tires must
meet under the Fede ral Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperature grades of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, unde rinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.

4668-1. Specifications
RimA metal support for a tire or a tire and tube assem-
bly upon which the tire beads are seated
Rim diameter (Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a rim
by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity weight (Total load
capacity)The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle’s designated seating capacity
Vehicle maximum load on the tire
The load on an individual tire that is determined by
distributing to each axle its share of the maximum
loaded vehicle weight, and dividing by two
Vehicle normal load on the tire
The load on an individual ti re that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight
(distributed in accor dance with Table 1
* below), and
dividing by two
Weather sideThe surface area of the rim not covered by the
inflated tire
Bead
The part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is
shaped to fit the rim
Bead separationA breakdown of the bond between components in
the bead
Bias ply tire
A pneumatic tire in which the ply cords that extend
to the beads are laid at alternate angles substan-
tially less than 90 degrees to the centerline of the
tread
CarcassThe tire structure, except tread and sidewall rubber
which, when inflated, bears the load
ChunkingThe breaking away of pieces of the tread or sidewall
CordThe strands forming the plies in the tire
Cord separationThe parting of cords from adjacent rubber com-
pounds
Tire related termMeaning

4688-1. Specifications
Outer diameterThe overall diameter of an inflated new tire
Overall width
The linear distance between the exteriors of the
sidewalls of an inflated tire, including elevations due
to labeling, decorations, or protective bands or ribs
Passenger car tire
A tire intended for use on passenger cars, multipur-
pose passenger vehicles, and trucks, that have a
gross vehicle weight rating (GVWR) of 10,000 lb.
or less.
PlyA layer of rubber-c oated parallel cords
Ply separationA parting of rubber compound between adjacent
plies
Pneumatic tire
A mechanical device made of rubber, chemicals,
fabric and steel or other materials, that, when
mounted on an automotive wheel, provides the
traction and contains the gas or fluid that sustains
the load
Radial ply tire
A pneumatic tire in which the ply cords that extend
to the beads are laid at su bstantially 90 degrees to
the centerline of the tread
Reinforced tire
A tire designed to operat e at higher loads and at
higher inflation pressures than the corresponding
standard tire
Section width
The linear distance between the exteriors of the
sidewalls of an inflated tire, excluding elevations
due to labeling, decoration, or protective bands
SidewallThat portion of a tire between the tread and bead
Sidewall separationThe parting of the rubber compound from the cord
material in the sidewall
Snow tire
A tire that attains a traction index equal to or
greater than 110, compared to the ASTM E-1136
Standard Referenc e Test Tire, when using the snow
traction test as described in ASTM F-1805-00,
Standard Test Method fo r Single Wheel Driving
Traction in a Straight Line on Snow-and Ice-Cov-
ered Surfaces, and which is marked with an Alpine
Symbol ( ) on at least one sidewall
Tire related termMeaning

4698-1. Specifications
8
Vehicle specifications
*: Table 1 -Occupant loading and distribution for vehicle normal load for various desig-nated seating capacities
Test rimThe rim on which a tire is fitted for testing, and may
be any rim listed as appropriate for use with that tire
TreadThat portion of a tire that comes into contact with
the road
Tread ribA tread section running ci rcumferentially around a
tire
Tread separationPulling away of the tread from the tire carcass
Treadwear indicators (TWI)
The projections within the principal grooves
designed to give a visual indication of the degrees
of wear of the tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire assembly
securely during testing
Tire related termMeaning
Designated seating capac- ity, Number of occupantsVehicle normal load, Num- ber of occupantsOccupant distribution in a normally loaded vehicle
2 through 422 in front
5 through 1032 in front, 1 in second seat
11 through 1552 in front, 1 in second seat, 1 in third seat, 1 in fourth seat
16 through 2072 in front, 2 in second seat, 2 in third seat, 1 in fourth seat

4768-2. Customization
■Steering wheel (P.140)
■Outside rear view mirrors ( P.142)
*:If equipped
■Power windows, and moon roof* or panoramic moon roof* ( P.145, 147, 150)
*:If equipped
■Moon roof* ( P.147)
*:If equipped
FunctionDefault settingCustomized setting
Auto tilt away functionOnOff——O
FunctionDefault settingCustomized setting
Automatic mirror folding and
extending operation
*
Linked to the lock-
ing/unlocking of the doorsOff
——OLinked to operation
of the engine switch
FunctionDefault settingCustomized setting
Mechanical key linked opera-
tionOffOn——O
Wireless remote control linked
operationOffOn (open only)——O
Wireless remote control linked
operation signal (buzzer)OnOff——O
FunctionDefault settingCustomized setting
Linked operation of compo-
nents when mechanical key is
used (open only)
Slide onlyTilt only——O
Linked operation of compo-
nents when wireless remote
control is used
Slide onlyTilt only——O
ABC
ABC
ABC
ABC

4788-2. Customization
■PCS (Pre-Collision System) (P.211)
■LTA (Lane Tracing Assist) ( P.218)
■RSA (Road Sign Assist)* ( P.227)
*:If equipped
FunctionDefault settingCustomized setting
PCS (Pre-Collision System)OnOff—O—
Adjust alert timingMiddleEarly—O—Late
FunctionDefault settingCustomized setting
Lane centering functionOnOff—O—
Steering assist functionOnOff—O—
Alert typeSteering wheel
vibrationBuzzer—O—
Alert sensitivityHighStandard—O—
Vehicle sway warning functionOnOff—O—
Vehicle sway warning sensitiv-
ityStandardHigh—O—Low
FunctionDefault settingCustomized setting
RSA (Road Sign Assist)OnOff—O—
Excess speed notification
methodDisplay onlyNo notification—O—Display and buzzer
Excess speed notification level1 mph (2 km/h)3 mph (5 km/h)—O—5 mph (10 km/h)
Other notifications method
(No-entry notification)Display onlyNo notification—O—Display and buzzer
ABC
ABC
ABC

500What to do if... (Troubleshooting)
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( P.440)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.440)
 Is the electronic key battery weak or
depleted? ( P.389)
 Is the engine switch in IGNITION
ON mode?
When locking the doors, turn the engine
switch off. ( P.179)
 Is the electronic key left inside the
vehicle?
When locking the doors, make sure that
you have the electronic key on your per-
son.
The function may not operate prop-
erly due to the condition of the radio
wave. ( P.114)
 Is the child-protector lock set?
The rear door cannot be opened from
inside the vehicle when the lock is set.
Open the rear door from outside and then
unlock the child-protector lock. ( P.100)
 Did you press the engine switch
while firmly depressing the brake
pedal? ( P.176)
 Is the shift lever in P? ( P.176)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.113)
 Is the steering wheel unlocked?
( P.177)
 Is the electronic key battery weak or
depleted?
In this case, the engine can be started in a
temporary way. ( P.442)
 Is the battery discharged?
( P.443)
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The electronic key does not
operate properly
The doors cannot be locked or
unlocked
The rear door cannot be opened
If you think something is wrong
The engine does not start
The shift lever cannot be shifted
from P even if you depress the
brake pedal

501What to do if... (Troubleshooting)
Is the engine switch in IGNITION
ON mode?
If you cannot release the shift lever by
depressing the brake pedal with the engine
switch in IGNITION ON mode ( P.181)
It is locked automatically to prevent
theft of the vehicle. ( P.177)
 Is the window lock switch pressed?
The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( P.147)
 The auto power off function will be
operated if the vehicle is left in
ACCESSORY or IGNITION ON
mode (the engine is not running) for
a period of time. ( P.179)
 The seat belt reminder light is flash-
ing
Are the driver and the passengers wearing
the seat belts? ( P.416)
 The parking brake indicator is on
Is the parking brake released? ( P.185)
Depending on the situation, other
types of warning buzzer may also
sound. ( P.413, 422)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
( P.67)
Do one of the following to stop the
alarms:
 Unlock the doors.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine.
 Is the message displayed on the
multi-information display?
Check the message on the multi-informa-
tion display. ( P.422)
 When a warning light turns on or a
warning message is displayed, refer
to P.413, 422.
The steering wheel cannot be
turned after the engine is
stopped
The windows do not open or
close by operating the power
window switches
The engine switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed
When a problem has occurred
If you have a flat tire

504Alphabetical Index
Warning light .................................................413
Brake assist .....................................................277
Break-in tips..................................................... 157
Brightness control Instrument panel light control ................ 78
BSM (Blind Spot Monitor)....................... 239
Buzzer Hands off steering wheel warning (LTA)......................................................................... 226
C
Care Aluminum wheels ..................................... 350
Exterior .......................................................... 350
Interior ............................................................. 353
Seat belts........................................................ 353
Cargo capacity...................................... 161, 164
Cargo hooks ................................................. 322
Cargo net hooks .......................................... 322
Center Display ............................................. 292
Chains .............................................................. 284
Child restraint system Fixed with a LATCH system .................. 54
Fixed with a seat belt...................................50
Front passenger occupant classification system ............................................................. 39
Points to remember .................................... 45
Riding with children ..................................... 45
Types of child restraint system installation method ........................................................... 46
Using an anchor bracket .......................... 57
Child safety Airbag precautions...................................... 36
Battery precautions ......................370, 446
Child restraint system................................. 46
Heated steering wheel and seat heater precautions................................................. 310
How your child should wear the seat belt .............................................................................27
Moon roof precautions ............................149
Panoramic moon roof precautions ....152
Power back door precautions............... 101 Power window lock switch .....................147
Power window precautions .................. 146
Rear door child-protectors ................... 100
Removed electronic key battery precau-
tions .............................................................. 390
Seat belt extender precautions.............. 27
Seat belt precautions .................................. 45
Child-protectors........................................... 100
Cleaning Aluminum wheels ..................................... 350
Exterior........................................................... 350
Interior .............................................................353
Radar sensor ............................................... 205
Seat belts ........................................................353
Clock ........................................................ 75, 336
Coat hooks..................................................... 336
Coin box............................................................321
Compass ......................................................... 346
Condenser ..................................................... 368
Console box ................................................... 318
Consumption screen .................................... 90
Cooling system............................................. 367 Engine overheating................................... 447
Cornering lights .............................................192 Replacing light bulbs ............................... 395
Cruise control Dynamic radar cruise control with full-speed range ......................................230
Cup holders .....................................................319
Current fuel consumption .......................... 80
Curtain shield airbags .................................. 30
Customizable features .............................. 470
D
Daytime running light system .................. 190
Defogger Outside rear view mirrors.................... 298
Rear window ............................................... 298
Windshield ................................................... 298
Differential Rear differential oil......... ..................... ...... 456
Dimension ...................................................... 452

507Alphabetical Index
FuelCapacity ......................................................... 454
Fuel gauge ....................................................... 75
Fuel pump shut off system ...................... 412
Information ....................................................459
Refueling ........................................................ 202
Type.................................................................. 454
Warning light .................................................416
Fuel consumption Average fuel economy ..............................80
Current fuel consumption........................80
Fuel filler door If the fuel filler door cannot be opened.........................................................................440
Refueling ........................................................ 202
Fuel gauge ..........................................................75
Fuel pump shut off system.......................... 412
Fuses ...................................................................391
G
Garage door opener ................................. 339
Gauges ................................................................75
G-force............................................................... 82
Glove box ........................................................ 318
Glove box light .............................................. 318
Grocery bag hooks .................................... 322
H
Hands Free Power Back Door ............... 104
Head restraints ............................................... 137
Headlight aim ................................................ 392
Headlights Adaptive Front-lighting System (AFS)........................................................................... 192
Automatic High Beam system..............193
Light switch .................................................... 190
Replacing light bulbs................................395
Head-up display.............................................. 86 Driving information display area........... 86
Eco Driving Indicator ................................. 90
HUD (Head-up display) switch............ 87 Navigation system-linked display ........89
Settings.............................................................. 88
Heated steering wheel ............................... 310
Heaters Front automatic air conditioning system..........................................................................296
Heated steering wheel ............................. 310
Outside rear view mirrors.................... 298
Rear automatic air conditioning system
..........................................................................307
Seat heaters ................................................... 310
High mounted stoplight Replacing light bulbs ............................... 395
Hill-start assist control ............................... 278
Hood Open................................................................363
Hooks Cargo hooks................................................ 322
Cargo net hooks ........................................ 322
Coat hooks ...................................................336
Front passenger footwell hooks........ 338
Grocery bag hooks.................................. 322
Retaining hooks (floor mat) ..................... 24
Horn ................................................................... 140
HUD (Head-up display) switch ................ 87
I
I/M test ............................................................ 360
Identification Engine..............................................................453
Vehicle ............................................................452
If your vehicle has to be stopped in an emergency .................................................. 404
Ignition switch (engine switch)................. 176 Auto power off function............................179
Changing the engine switch modes ..179
If your vehicle has to be stopped in an emergency ................................................ 404
Indicators ............................................................72
Initialization Items to initialize ........................................ 483
Maintenance.................................... 356, 367