weight LEXUS RX350 2020 User Guide

1684-1. Before driving
■GCWR (Gross Combination
Weight Rating)
The maximum allowable gross combi-
nation weight. The gross combination
weight is the sum of the total vehicle
weight (including the occupants, cargo
and any optional equipment installed
on the vehicle) and the weight of the
trailer being towed (including the
cargo in the trailer).
■GVWR (Gross Vehicle Weight
Rating)
The maximum allowable gross vehicle
weight. The gross vehicle weight is the
total weight of the vehicle. When tow-
ing a trailer, it is the sum of the vehicle
weight (including the occupants, cargo
and any optional equipment installed
on the vehicle) and the tongue weight.
WARNING
●Vehicle-trailer instabil ity is more likely
on steep long downhills. Before
descending steep or long downhill
grades, slow down and downshift. Do
not make sudden downshifts when
descending steep or long downhill
grades. Avoid holding the brake pedal
down too long or applying the brakes
too frequently. This could cause the
brakes to overheat and result in
reduced braking efficiency.
●Do not tow a trailer when the compact
spare tire is installed on your vehicle.
■When towing a trailer
Lexus recommends trailers with brakes
that conform to any applicable federal
and state/provincial regulations.
●If the gross trailer weight exceeds
unbraked TWR, trailer brakes are
required. Lexus recommends trailers
with brakes that conform to all applica-
ble federal and state/provincial regula-
tions.
●Never tap into your vehicle’s hydraulic
system, as this will lower the vehicle’s
braking effectiveness.
●Never tow a trailer without using a
safety chain securely attached to both
the trailer and the vehicle. If damage
occurs to the coupling unit or hitch
ball, there is danger of the trailer wan-
dering into another lane.
NOTICE
■When installing a trailer hitch
Use only the position recommended by
your Lexus dealer. Do not install the
trailer hitch on the bumper; this may
cause body damage.
■Do not directly splice trailer lights
Do not directly splice trailer lights.
Directly splicing trailer lights may dam-
age your vehicle’s electrical system and
cause a malfunction.
Towing related terms

1694-1. Before driving
4
Driving
■GAWR (Gross Axle Weight Rat-
ing)
The maximum allowable gross axle
weight. The gross axle weight is the
load placed on each axle (front and
rear).
Front GAWR
Rear GAWR
■TWR (Trailer Weight Rating)
The maximum allowable gross trailer
weight. The gross trailer weight is the
sum of the trailer weight and the weight
of the cargo in the trailer.
TWR is calculated assuming base vehi-
cle with one driver, one front passen-
ger, towing package (if available), hitch
and hitch systems (if required).
Additional optional equipment, passengers
and cargo in the vehicle will reduce the
trailer weight rating so as not to exceed
GCWR, GVWR and GAWR.
If the gross trailer weight exceeds 3000
lb. (1360 kg), it is recommended to use a
trailer with 2 or more axles.
With brakes
■Unbraked TWR (Unbraked Trailer
Weight Rating)
The trailer weight rating for towing a
trailer without a trailer service brake
system.
Without brakes
■Tongue Weight
The load placed on the trailer hitch ball.
( P.170)
A
B
A
A

1704-1. Before driving
The gross trailer weight must never
exceed 3500 lb. (1585 kg).
 The gross combinat ion weight must
never exceed the following:
RX350
2WD models: 9165 lb. (4157 kg)
AWD models: 9360 lb. (4246 kg)
RX350L
2WD models: 9205 lb. (4175 kg)
AWD models: 9360 lb. (4246 kg)
 The gross vehicle weight must never
exceed the GVWR indicated on the
Certification Label. ( P.452)
 The gross axle weight on each axle
must never exceed the GAWR indi-
cated on the Certification Label.
( P.452)
 If the gross trailer weight is over the
unbraked TWR, trailer service
brakes are required.
 If the gross trailer weight is over
2000 lb. (907 kg), a sway control
device with sufficient capacity is
required. Confirm that the gross trailer weight,
gross combination we
ight, gross vehi-
cle weight, gross axle weight and
tongue weight are all within the limits.
■GCWR*
RX350
2WD models: 9165 lb. (4157 kg)
AWD models: 9360 lb. (4246 kg)
RX350L
2WD models: 9400 lb. (4263 kg)
AWD models: 9485 lb. (4302 kg)
■TWR*
3500 lb. (1585 kg)
■Unbraked TWR*
1000 lb. (453 kg)
*: This models meet the tow-vehicle traile- ring requirement of SAE International
per SAE J2807.
 A recommended tongue weight
varies in accordance with the types
of trailers or towing as described
below.
 To ensure the recommended values
shown below, the trailer must be
loaded by referring to the following
instructions.
•Tongue Weight
The gross trailer weight should be distrib-
uted so that the tongue weight is 9% to
11%.
Weight limits
GCWR, TWR and Unbraked
TWR
Trailer Tongue Weight

1714-1. Before driving
4
Driving
(Tongue weight/Gross trailer weight x 100
= 9% to 11%)
The gross trailer weight, gross axle weight
and tongue weight can be measured with
platform scales found at a highway weigh-
ing station, building supply company,
trucking company, junk yard, etc.
Gross trailer weight
Tongue weight
Trailer hitch assemblies have different
weight capacities. Lexus recommends
the use of Lexus hitch/bracket for your
vehicle. For details, contact your Lexus
dealer.
 If you wish to install a trailer hitch,
contact your Lexus dealer.
 Use only a hitch that conforms to
the gross trailer weight requirement
of your vehicle.
 Follow the directions supplied by the
hitch manufacturer.
 Lubricate the hitch ball with a light
coating of grease.
 Remove the hitch ball whenever you
are not towing a trailer. Remove the
trailer hitch if you do not need it.
After removing the hitch, seal any mounting hole in the vehicle body to
prevent entry of any substances into
the vehicle.
Use the correct trailer ball for your
application.
Trailer ball load rating
Matches or exceeds the gross trailer
weight rating of the trailer.
Hitch
A
B
WARNING
■Hitches
Trailer hitch assemblies have different
weight capacities established by the hitch
manufacturer. Even though the vehicle
may be physically capable of towing a
higher weight, the operator must deter-
mine the maximum weight rating of the
particular hitch assembly and never
exceed the maximum weight rating
specified for the trailer-hitch. Exceeding
the maximum weight rating set by the
trailer-hitch manufacturer can cause an
accident resulting in death or serious
personal injuries.
Selecting trailer ball
Trailer classTypical trailer ball size
IV2 5/16 in.
II and III2 in.
I1 7/8 in.
A

1724-1. Before driving
Ball diameter
Matches the size of the trailer coupler.
Most couplers are stamped with the
required trailer ball size.
Shank length
Protrudes beyond the bottom of the lock
washer and nut by at least 2 threads.
Shank diameter
Matches the ball mount hole diameter size.
Weight carrying ball position
• RX350 : 44.96 in. (1142 mm)
• RX350L : 49.72 in. (1263 mm)
Hitch receiver pin hole position
• RX350 : 35.94 in. (913 mm)
• RX350L : 45.08 in. (1145 mm)
Use the wire harness stored in the rear
end under body.
■Auto current cut-off function
In case of over current, the auto cut-off
function stops the power flowing to the
trailer lights to prevent damage to the vehi-
cle’s electrical system.
This function is activ ated when the rated
current of any of the following trailer light
circuit components is exceeded:
●Tail lights: maximum 7.8 A
●Stop/turn signal light (right): maximum
4.5 A
●Stop/turn signal light (left): maximum 4.5
A
■When the auto current cut function is
activated
If a trailer light does not come on due to the
activation of the auto current cut function,
the light system will need to be reset.
Follow the reset procedure shown below.
●If a tail light does not come on, turn off the
headlight switch.
●If the right-side stop/turn signal light does
not come on, put the turn signal in the off
position or remove foot from the brake
pedal.
●If the left-side stop/t urn signal light does
not come on, put the turn signal in the off
position or remove foot from the brake
pedal.
If the emergency flashers do not operate,
press the emergency flasher switch to turn
them off.
After the light system is reset, operate the
light switches again to see if the lights oper-
ate normally.
If the lights do not operate normally, have
Positions for towing hitch
receiver and hitch ball
Connecting trailer lights
B
C
D
A
B

3726-3. Do-it-yourself maintenance
■When to replace your vehicle’s tires
Tires should be replaced if:
●The treadwear indicators are showing on
a tire.
●You have tire damage such as cuts, splits,
cracks deep enough to expose the fabric,
and bulges indicating internal damage.
●A tire goes flat repeatedly or cannot be
properly repaired due to the size or loca-
tion of a cut or other damage.
If you are not sure, consult with your Lexus
dealer.
■Tire life
Any tire over 6 years old must be checked
by a qualified technician even if it has sel-
dom or never been used or damage is not
obvious.
■Proper storage of the spare tire
(RX350L)
As an improperly stored spare tire may
cause damage to the wi re cable that holds
it, check that the spare tire is stored prop-
erly on a daily basis.
●If the stored spare tire appears to be
slanted or rattles while driving, the spare
tire may not be properly stored. Store the
spare tire again by performing the follow-
ing tire change procedure correctly:
1 If the spare tire is slanted, the hoist
assembly may be stuck in the wheel
opening. If the spare tire rattles while
driving, it may not be fully raised. Lower
the spare tire to the ground and make
sure that the hoist assembly is perpen-
dicular to the wheel opening.
2 Raise the tire slowly and steadily until a
click is heard and the jack handle skips.
If the spare tire cannot be lowered, the wire
cable may be severed. Have the vehicle inspected at your Lexus dealer.
■Maximum load of tire
Check that the maximum load of the
replacement tire is greater than 1/2 of the
Gross Axle Weight Ratings (GAWR) of
either the front axle or the rear axle, which-
ever is greater.
For the GAWR, see the Certification Label.
For the maximum load of the tire, see the
load limit at maximum cold tire inflation
pressure mentioned on the sidewall of the
tire. ( P.461)
■Tire types
●Summer tires
Summer tires are high-speed performance
tires best suited to highway driving under
dry conditions. Since summer tires do not
have the same traction performance as
snow tires, summer ti res are inadequate for
driving on snow-covered or icy roads. For
driving on snow-covered roads or icy
roads, the use of snow tires is recom-
mended. When installing snow tires, be
sure to replace all four tires.
●All season tires
All season tires are designed to provide
better traction in snow and to be adequate
for driving in most winter conditions as well
as for use year-round. All season tires,
however, do not have adequate traction
performance compared with snow tires in
heavy or loose snow. Also, all season tires
fall short in accelerati on and handling per-
formance compared with summer tires in
highway driving.
●Snow tires
For driving on snow-covered roads or icy

3846-3. Do-it-yourself maintenance
ing.
●Always use a tire pressure gauge.
It is difficult to judge if a tire is properly
inflated based only on its appearance.
●It is normal for the tire inflation pressure
to be higher after driving as heat is gen-
erated in the tire. Do not reduce tire infla-
tion pressure after driving.
●Never exceed the vehicle capacity
weight.
Passengers and luggage weight should
be placed so that the vehicle is balanced.
When replacing wheels, care should
be taken to ensure that they are equiv-
alent to those removed in load capac-
ity, diameter, rim width and inset
*.
Replacement wheels are available at
your Lexus dealer.
*: Conventionally referred to as offset.
Lexus does not recommend using the
following:
 Wheels of different sizes or types
 Used wheels
 Bent wheels that have been straight-
ened
■When replacing wheels
The wheels of your vehicle are equipped
with tire pressure wa rning valves and trans-
mitters that allow the tire pressure warning
system to provide advance warning in the
event of a loss in tire inflation pressure.
Whenever wheels are replaced, tire pres-
sure warning valves an d transmitters must
be installed. ( P.380)
WARNING
■Proper inflation is critical to save tire
performance
Keep your tires properly inflated.
If the tires are not properly inflated, the
following conditions may occur which
could lead to an accident resulting in
death or serious injury:
●Excessive wear
●Uneven wear
●Poor handling
●Possibility of blowouts resulting from
overheated tires
●Air leaking from between tire and
wheel
●Wheel deformation and/or tire dam-
age
●Greater possibility of tire damage
while driving (due to road hazards,
expansion joints, sharp edges in the
road, etc.)
NOTICE
■When inspecting and adjusting tire
inflation pressure
Be sure to put the tire valve caps back on.
If a valve cap is not installed, dirt or mois-
ture may get into the valve and cause an
air leak, resulting in decreased tire infla-
tion pressure.
Wheels
If a wheel is bent, cracked or heavily
corroded, it should be replaced.
Otherwise, the tire may separate
from the wheel or cause a loss of
handling control.
Wheel selection
WARNING
■When replacing wheels
●Do not use wheels that are a different
size from those recommended in the
Owner’s Manual, as this may result in a
loss of handling control.

3856-3. Do-it-yourself maintenance
6
Maintenance and care
Use only Lexus wheel nuts and
wrenches designed for use with
your aluminum wheels.
 When rotating, repairing or chang-
ing your tires, check that the wheel
nuts are still tight after driving 1000
miles (1600 km).
 Be careful not to damage the alumi-
num wheels when using tire chains.
 Use only Lexus genuine balance
weights or equivalent and a plastic or rubber hammer when balancing
your wheels.
WARNING
●Never use an inner tube in a leaking
wheel which is designed for a tubeless
tire.
Doing so may result in an accident,
causing death or serious injury.
■Use of defective wheels prohibited
Do not use cracked or deformed wheels.
Doing so could cause the tire to leak air
during driving, possibly causing an acci-
dent.
NOTICE
■Replacing tire pressure warning
valves and transmitters
●Because tire repair or replacement
may affect the tire pressure warning
valves and transmitters, make sure to
have tires serviced by your Lexus
dealer or other qualified service shop.
In addition, make sure to purchase
your tire pressure warning valves and
transmitters at your Lexus dealer.
●Ensure that only ge nuine Lexus wheels
are used on your vehicle.
Tire pressure warning valves and trans-
mitters may not work properly with
non-genuine wheels.
Aluminum wheel precautions

4528-1. Specifications
8-1.Specifications
*1:RX350
*2:RX350L
*3:Unladen vehicle
*4: For GGL25L-BWZGBA models*9
*5
:Except for GGL25L-BWZGBA models*9
*6
: Vehicles with separate -type second-row seats
*7: Vehicles with bench-type second-row seats
*8: Vehicles with towing package
*9: The model code is indicated on the Certification Label. (P.452)
■Vehicle identification number
The vehicle identification number (VIN) is the legal identifier for your
vehicle. This is the primary identifica-
Maintenance data (fuel, oil level, etc.)
Dimensions and weight
Overall length192.5 in. (4890 mm)*1
196.9 in. (5000 mm)*2
Overall width74.6 in. (1895 mm)
Overall height*367.7 in. (1720 mm)
Wheelbase109.8 in. (2790 mm)
Tread
Front64.4 in. (1635 mm)*1
64.5 in. (1640 mm)*2
Rear64.0 in. (1625 mm)*1
64.1 in. (1630 mm)*2
Vehicle capacity weight
(Occupants + luggage)
1050 lb. (480 kg)*1, 4
920 lb. (420 kg)*1, 5
1140 lb. (520 kg)*2, 6
1235 lb. (560 kg)*2, 7
Trailer Weight Rating*8
(Trailer weight + cargo weight)3500 lb. (1585 kg)
Vehicle identification

4658-1. Specifications
8
Vehicle specifications
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pressureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning
and additional weight optional engine
Maximum loaded vehicle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that fol-
lows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options weight
The combined weight of installed regular produc-
tion options weighing over 5 lb. (2.3 kg) in excess of
the standard items which they replace, not previ-
ously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and special trim