2021 LEXUS RX450h towing capacity

1704-1. Before driving
gage load capacity calculated in Step
4.
(6) If your vehicle will be towing a
trailer, load from your trailer will be
transferred to your vehicle. Consult
this manual to determine how this
reduces the available cargo and lug-
gage load capacity of your vehicle.
( P.172)
Vehicles without towing package: Lexus
does not recommend towing a trailer with
your vehicle. Your vehicle is not designed
for trailer towing.
Cargo capacity
Total load capacity (vehicle capac-
ity weight) ( P.460)
When 2 people with the combined
weight of A lb. (kg) are riding in your
vehicle, which has a total load capacity
(vehicle capacity weight) of B lb. (kg),
the available amount of cargo and lug-
gage load capacity will be C lb. (kg) as
follows:
B
*2 lb. (kg) - A*1 lb. (kg) = C*3 lb. (kg)
*1: A =Weight of people
*2: B =Total load capacity
*3: C =Available cargo and luggage load
In this condition, if 3 more passengers with
the combined weight of D lb. (kg) get on,
the available cargo and luggage load will
be reduced E lb. (kg) as follows:
C lb. (kg) - D*4 lb. (kg) = E*5 lb. (kg)
*4: D =Additional weight of people
*5: E =Available cargo and luggage load
As shown in the example above, if the
number of occupant s increases, the
cargo and luggage load will be
reduced by an amount that equals the
increased weight due to the additional
occupants. In other words, if an
increase in the number of occupants
causes an excess of the total load
capacity (combined weight of occu-
pants plus cargo and luggage load),
you must reduce the cargo and lug-
gage on your vehicle.
Calculation formula for your
vehicle
A
B
WARNING
■Things that must not be carried in the
luggage compartment
The following things may cause a fire if
loaded in the luggage compartment:
●Receptacles containing gasoline
●Aerosol cans
■Storage precautions
Observe the following precautions.
Failure to do so may prevent the pedals
from being depressed properly, may
block the driver’s vision, or may result in
items hitting the driver or passengers,
possibly causing an accident.
●Stow cargo and luggage in the lug-
gage compartment whenever possi-
ble.

1724-1. Before driving
■Total load capacity and seating capacity
These details are also described on the tire
and loading information label. ( P.387)
Vehicle load limits
Vehicle load limits include total
load capacity, seating capacity,
trailer weight rating and cargo
capacity.
 Total load capacity (vehicle
capacity weight):  P.460
Total load capacity means the com-
bined weight of occupants, cargo
and luggage.
 Seating capacity
(RX450h): P.460
Seating capacity means the maxi-
mum number of occupants whose
estimated average weight is 150 lb.
(68 kg) per person.
 Seating capacity
(RX450hL): P.460
Seating capacity means the maxi-
mum number of occupants whose
estimated average weight is 150 lb.
(68 kg) per person.
 TWR (Trailer Weight Rating)
(vehicles with towing package):
P.178, 460
TWR means the maximum gross
trailer weight (trailer weight plus its
cargo weight) that your vehicle is
able to tow.
 TWR (Trailer Weight Rating)
(vehicles without towing pack-
age)
Lexus does not recommend towing
a trailer with your vehicle.
 Cargo capacity
Cargo capacity may increase or
decrease depending on the weight
and the number of occupants.
WARNING
■Overloading the vehicle
Do not overload the vehicle.
It may not only cause damage to the tires,
but also degrade steering and braking
ability, resulting in an accident.

1754-1. Before driving
4
Driving
and trailer.)
●After the trailer swaying has stopped:
• Stop in a safe place. Get all occupants out of the vehicle.
• Check the tires of the vehicle and the
trailer.
• Check the load in the trailer. Make sure the load has not shifted.
Make sure the tongue weight is appropri-
ate, if possible.
• Check the load in the vehicle.
Make sure the vehicle is not overloaded
after occupants get in.
If you cannot find any problems, the speed
at which trailer swaying occurred is beyond
the limit of your particular vehicle-trailer
combination. Drive at a lower speed to pre-
vent instability. Remember that swaying of
the towing vehicle-trailer increases as
speed increases.
WARNING
■Trailer towing precautions
To tow a trailer safely, use extreme care
and drive the vehicle in accordance with
the trailer’s characteristics and operating
conditions. Failure to do so could cause
an accident resulting in death or serious
injury. Vehicle stabi lity and braking per-
formance are affected by trailer stability,
brake setting and performance, and the
hitch. Your vehicle will handle differently
when towing a trailer.
■To avoid accident or injury
●Do not exceed the TWR, unbraked
TWR, GCWR, GVWR or GAWR.
●If the gross trailer weight is over 2000
lb. (907 kg), a sway control device with
sufficient capacity is required.
●Adjust the tongue weight within the
appropriate range. Place heavier loads
as close to the trailer axle as possible.
●Do not exceed 65 mph (104 km/h),
the posted towing speed limit or the
speed limit for your trailer as set forth
in your trailer owner’s manual, which-
ever is lowest. Slow down sufficiently
before making a turn, in cross winds,
on wet or slippery surface, etc. to help
avoid an accident. If you experience a
vehicle-trailer instability from reduc-
ing a certain speed, slow down and
make sure you keep your vehicle
speed under the speed of which you
experience the instability.
●Do not make jerky, abrupt or sharp
turns.
●Do not apply the brakes suddenly as
you may skid, resulting in jackknifing
and loss of vehicle control. This is
especially true on wet or slippery sur-
faces.
●Do not exceed the trailer hitch assem-
bly weight, gross vehicle weight, gross
axle weight and tra iler tongue weight
capacities.
●Do not use the following systems when
trailer towing.
• Dynamic radar cruise control with full-speed range
• LTA (Lane Tracing Assist)
• PCS (Pre-Collision System)
• BSM (Blind Spot Monitor) (if equipped)
●Slow down and downshift before
descending steep or long downhill
grades. Do not make sudden down-
shifts while descendi ng steep or long
downhill grades.

1784-1. Before driving
The gross trailer weight must never
exceed 3500 lb. (1585 kg).
 The gross combinat ion weight must
never exceed 9500 lb. (4309 kg).
 The gross vehicle weight must never
exceed the GVWR indicated on the
Certification Label. ( P.460)
 The gross axle weight on each axle
must never exceed the GAWR indi-
cated on the Certification Label.
( P.460)
 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 weight, gross vehi-
cle weight, gross axle weight and
tongue weight are all within the limits.
■GCWR*
9500 lb. (4309 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%.
(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.
Weight limits
GCWR, TWR and Unbraked
TWR
Trailer Tongue Weight

4608-1. Specifications
8-1.Specifications
*1:RX450h
*2:RX450hL
*3:Unladen vehicle
*4: Vehicles with towing package
*1:RX450h
*2:RX450hL
■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)920 lb. (420 kg)*1
1070 lb. (490 kg)*2
Trailer Weight Rating*4
(Trailer weight + cargo weight)3500 lb. (1585 kg)*1
Seating capacity
Seating capacity5 (Front 2, Rear 3)*1
6 (Front 2, Rear 4)*2
Vehicle identification

4638-1. Specifications
8
Vehicle specifications
■Oil capacity (Drain and refillref-
erence
*)
*: The engine oil capacity is a reference quantity to be used when changing the
engine oil. Warm up the engine and turn
off the hybrid system, wait more than 5
minutes, and check the oil level on the
dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is used in
your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil”
or equivalent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-5 multigrade
engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good starting
in cold weather.
If SAE 0W-20 is not available, SAE
5W-20 oil may be used. However, it
must be replaced with SAE 0W-20 at
the next oil change. Outside temperature
Oil viscosity (0W-20 is explained here
as an example):
• The 0W in 0W-20 indicates the characteristic of the oil which allows
cold startability. Oils with a lower
value before the W allow for easier
starting of the engine in cold
weather.
• The 20 in 0W-20 indicates the vis- cosity characteristic of the oil when
the oil is at high temperature. An oil
with a higher viscosity (one with a
higher value) may be better suited if
the vehicle is operated at high
speeds, or under extreme load con-
ditions.
How to read oil container label:
The International Lubricant Specifica-
tion Advisory Committee (ILSAC)
Certification Mark is added to some oil
containers to help you select the oil you
should use.
Lubrication system
With filter
Vehicles with towing pack-
age
5.8 qt. (5.5 L, 4.8 Imp. qt.)
Vehicles without towing
package
5.7 qt. (5.4 L, 4.8 Imp. qt.)
Without fil-
ter5.6 qt. (5.3 L, 4.7 Imp. qt.)
A

4648-1. Specifications
*: The coolant capacity is a reference quantity.If replacement is necessary, contact your Lexus dealer.
Cooling system
Capacity*
Gasoline
engine
RX450h (Vehicles with out towing package)
10.3 qt. (9.8 L, 8.6 Imp. qt.)
RX450h (Vehicles with towing package)
10.7 qt. (10.1 L, 8.9 Imp. qt.)
RX450hL
13.2 qt. (12.5 L, 11 Imp. qt.)
Power con-
trol unit2.0 qt. (1.9 L, 1.7 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with
long-life hybrid orga nic acid technology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO FK20HBR8
Gap0.03 in. (0.8 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

524Alphabetical Index
Tire pressure warning systemFunction .......................................................... 382
Initializing ...................................................... 385
Installing tire pressure warning valves and transmitters ......................................384
Registering ID codes ............................... 387
Warning light ............................................... 422
Tires Chains ............................................................. 292
Checking ...................................................... 380
If you have a flat tire .................................. 432
Inflation pressure........................................ 387
Information ...................................................... 471
Replacing ....................................................... 432
Rotating tires ................................................ 382
Size.................................................................... 466
Snow tires ........................................................ 291
Spare tire........................................................ 432
Tire inflation pressu re display function
......................................................................... 382
Tire pressure warning system ............. 382
Warning light ............................................... 422
Tools.................................................................. 433
Top tether strap................................................57
Total load capacity ...................................... 460
Towing Dinghy towing .............................................. 183
Emergency towing ..................................... 413
Towing eyelet ................................................415
Trailer towing ................................................. 173
TRAC (Traction Control) ........................ 284
Traction battery (hybrid battery) Hybrid battery (traction battery) air vents.............................................................................. 71
Location............................................................. 69
Specification ................................................. 462
Warning message.........................................72
Traction Control (TRAC) ........................ 284
Traction motor (electric motor) ............... 66
Trailer Sway Control.................................. 284
Trailer towing .................................................. 173 Transmission
Driving mode select switch ................... 281
Hybrid transmission..................................... 191
M mode ........................................................... 193
Paddle shift switches ....................... 192, 193
Trip meters ........................................................ 87
Turn signal lights Replacing light bulbs ............................... 400
Turn signal lever .......................................... 194
Wattage ......................................................... 468
U
USB charging ports.................................... 334
V
Vanity lights.................................................... 345Wattage ......................................................... 468
Vanity mirrors ............................................... 345
VDIM (Vehicle Dynamics Integrated Man- agement)...................................................... 284
Vehicle data recording ....................................7
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 284
Vehicle identification number ................ 460
Vehicle Stability Control (VSC) ........... 283
Ventilators (seat ventilators).................... 318
VSC (Vehicle Stability Control) ........... 283
W
Warning buzzers Approach warning.................................... 244
Brake Override System .........................420
Door lock .......................................................... 110
Downshifting ................................................. 193
Drive-Start Control...................................420
Electric power steering.............................421
Hands off steering wheel warning (LTA).......................................................................... 234
High coolant temperature...................... 418
Hybrid system overheat .......................... 419