Toyota Sienna (2019 year). Manual — part 14
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Vehicle load limits
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Total load capacity (vehicle capacity weight):
Total load capacity means the combined weight of occupants, cargo
and luggage.
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Seating capacity
Without second center seat: 7 occupants (Front 2, Rear 5)
With second center seat: 8 occupants (Front 2, Rear 6)
Seating capacity means the maximum number of occupants whose
estimated average weight is 150 lb. (68 kg) per person.
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TWR (Trailer Weight Rating):
TWR means the maximum gross trailer weight (trailer weight plus
its cargo weight) that your vehicle is able to tow.
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Cargo capacity
Cargo capacity may increase or decrease depending on the weight
and the number of occupants.
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Total load capacity and seating capacity
These details are also described on the tire and loading information label.
(
Vehicle load limits include total load capacity, seating capacity,
TWR (Trailer Weight Rating) and cargo capacity.
WARNING
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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.
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Trailer towing (with towing package)
Contact your Toyota dealer for further information about additional
requirements such as a towing kit, etc.
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GCWR (Gross Combination Weight Rating)
The maximum allowable gross
combination 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).
Your vehicle is designed primarily as a passenger-and-load-car-
rying vehicle. Towing a trailer can have an adverse impact on
handling, performance, braking, durability, and fuel consump-
tion. For your safety and the safety of others, you must not over-
load your vehicle or trailer. You must also ensure that you are
using appropriate towing equipment, that the towing equipment
has been installed correctly and used properly, and that you
employ the requisite driving habits.
Vehicle-trailer stability and braking performance are affected by
trailer stability, brake performance and setting, trailer brakes,
the hitch and hitch systems (if equipped).
To tow a trailer safely, use extreme care and drive the vehicle in
accordance with your trailer’s characteristics and operating
conditions.
Toyota warranties do not apply to damage or malfunction
caused by towing a trailer for commercial purposes.
Towing related terms
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GVWR (Gross Vehicle Weight Rating)
The maximum allowable gross
vehicle weight. The gross vehi-
cle weight is the total weight of
the vehicle. When towing a
trailer, it is the sum of the vehi-
cle weight (including the occu-
pants, cargo and any optional
equipment installed on the vehi-
cle) and the tongue weight.
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GAWR (Gross Axle Weight Rating)
The maximum allowable gross
axle weight. The gross axle
weight is the load placed on
each axle (front and rear).
Front GAWR
Rear GAWR
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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 vehicle with one driver,
one front passenger, towing
package, hitch and hitch sys-
tems (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.
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Unbraked TWR (Unbraked Trailer Weight Rating)
The trailer weight rating for tow-
ing a trailer without a trailer ser-
vice brake system.
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Tongue Weight
The load placed on the trailer
hitch ball. (
(With brakes)
(Without brakes)
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The gross trailer weight must never exceed 3500 lb. (1585 kg).
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The gross combination weight must never exceed the GCWR
described below.
2WD models: 8900 lb. (4037 kg)
AWD models: 8990 lb. (4078 kg)
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The gross vehicle weight must
never exceed the GVWR indi-
cated on the Certification Label.
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The gross axle weight on each
axle must never exceed the
GAWR indicated on the Certifi-
cation Label.
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If the gross trailer weight is over the unbraked TWR, trailer service
brakes are required.
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If the gross trailer weight is over 2000 lbs. (907 kg), a sway control
device with sufficient capacity is required.
Weight limits
: The towing package is required.
Toyota does not recommend towing with this vehicle without the towing
package.
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Confirm that the gross trailer weight, gross combination weight, gross
vehicle weight, gross axle weight and tongue weight are all within the
limits.
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GCWR
2WD models: 8900 lb. (4037 kg)
AWD models: 8990 lb. (4078 kg)
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TWR
3500 lb. (1585 kg)
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Unbraked TWR
1000 lb. (450 kg)
GCWR, TWR and Unbraked TWR
: These models meet the tow-vehicle trailering requirement of SAE Interna-
tional per SAE J2807.
The towing package is required.
Toyota does not recommend towing with this vehicle without the towing
package.
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A recommended tongue weight varies in accordance with the types
of trailers or towing as described below.
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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 distributed so that the tongue
weight is 9% to 11%.
(Tongue weight / Gross trailer weight
100 = 9% to 11%)
Gross trailer weight
Tongue weight
The gross trailer weight, gross axle weight and tongue weight can
be measured with platform scales found at a highway weighing sta-
tion, building supply company, trucking company, junk yard, etc.
Trailer hitch assemblies have different weight capacities. Toyota rec-
ommends the use of Toyota hitch/bracket for your vehicle. For details,
contact your Toyota dealer.
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If you wish to install a trailer hitch, contact your Toyota dealer.
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Use only a hitch that conforms to the gross trailer weight require-
ment of your vehicle.
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Follow the directions supplied by the hitch manufacturer.
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Lubricate the hitch ball with a light coating of grease.
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Remove the trailer hitch whenever you are not towing a trailer. After
removing the hitch, seal any mounting hole in the vehicle body to
prevent entry of any substances into the vehicle.
Trailer Tongue Weight
1
2
Hitch
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Use the correct trailer ball for your application.
Trailer ball load rating
Matches or exceeds the gross
trailer weight rating of the trailer.
Ball diameter
Matches the size of the trailer cou-
pler. 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.
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Matching trailer ball height to trailer coupler height
Selecting trailer ball
Trailer class
Typical trailer ball
size
IV
2 5/16 in.
II and III
2 in.
I
1 7/8 in.
1
2
No matter which class of tow hitch
applies, for a safe trailer hookup, the
trailer ball setup on must be proper height
for the coupler on the trailer.
Coupler
Trailer ball
3
4
1
2
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Hitch receiver pin hole position:
37.3 in. (949.8 mm)
Please consult your dealer when installing trailer lights, as incorrect
installation may cause damage to the vehicle’s lights. Please take
care to comply with your state’s laws when installing trailer lights.
Your vehicle will handle differently when towing a trailer. Help to avoid
an accident, death or serious injury, keep the following in mind when
towing:
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Speed limits for towing a trailer vary by state or province. Do not
exceed the posted towing speed limit.
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Toyota recommends that the vehicle-trailer speed limit is 65 mph
(104 km/h) on a flat, straight, dry road. Do not exceed this limit, the
posted towing speed limit or the speed limit for your trailer as set
forth in your trailer owner’s manual, whichever is lowest. Instability
of the towing vehicle-trailer combination (trailer sway) increases as
speed increases. Exceeding speed limits may cause loss of control.
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Before starting out, check the trailer lights, tires and the vehicle-
trailer connections. Recheck after driving a short distance.
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Practice turning, stopping and reversing with the trailer attached in
an area away from traffic until you become accustomed to the feel
of the vehicle-trailer combination.
Positions for towing hitch receiver
1
Connecting trailer lights
Trailer towing tips
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Reversing with a trailer attached is difficult and requires practice.
Grip the bottom of the steering wheel and move your hand to the
left to move the trailer to the left. Move your hand to the right to
move the trailer to the right. (This is generally opposite to reversing
without a trailer attached.) Avoid sharp or prolonged turning. Have
someone guide you when reversing to reduce the risk of an acci-
dent.
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As stopping distance is increased when towing a trailer, vehicle-to-
vehicle distance should be increased. For each 10 mph (16 km/h)
of speed, allow at least one vehicle and trailer length.
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Avoid sudden braking as you may skid, resulting in the trailer jack-
knifing and a loss of vehicle control. This is especially true on wet or
slippery surfaces.
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Avoid jerky starts or sudden acceleration.
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Avoid jerky steering and sharp turns, and slow down before making
a turn.
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Note that when making a turn, the trailer wheels will be closer than
the vehicle wheels to the inside of the turn. Compensate by making
a wider than normal turning radius.
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Slow down before making a turn, in crosswinds, on wet or slippery
surfaces, etc.
Increasing vehicle speed can destabilize the trailer.
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Take care when passing other vehicles. Passing requires consider-
able distance. After passing a vehicle, do not forget the length of
your trailer, and be sure you have plenty of room before changing
lanes.
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To maintain engine braking efficiency and charging system perfor-
mance when using engine braking, do not put the transmission in
D. If in the S mode, transmission shift range position must be in 6 or
lower.
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Instability happens more frequently when descending steep or long
downhill grades. Before descending, slow down and downshift. Do
not make sudden downshifts while descending steep or long down-
hill grades.
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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.
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Due to the added load of the trailer, your vehicle’s engine may over-
heat on hot days (at temperatures over 85°F [30°C]) when driving
up a long or steep grade. If the Engine coolant temperature gauge
overheating, immediately turn off the air conditioning (if in use), pull
your vehicle off the road and stop in a safe spot. (
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Always place wheel blocks under both the vehicle’s and the trailer’s
wheels when parking. Apply the parking brake firmly, and put the
transmission in P. Avoid parking on a slope, but if unavoidable, do
so only after performing the following:
Apply the brakes and keep them applied.
Have someone place wheel blocks under both the vehicle’s and
trailer’s wheels.
When the wheel blocks are in place, release the brakes slowly
until the blocks absorb the load.
Apply the parking brake firmly.
Shift into P and turn off the engine.
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When restarting after parking on a slope:
With the transmission in P, start the engine. Be sure to keep the
brake pedal pressed.
Shift into a forward gear. If reversing, shift into R.
Release the parking brake and brake pedal, and slowly pull or
back away from the wheel blocks. Stop and apply the brakes.
Have someone retrieve the blocks.
1
2
3
4
5
1
2
3
4
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Before towing
Check that the following conditions are met:
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Ensure that your vehicle’s tires are properly inflated. (
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Trailer tires are inflated according to the trailer manufacturer’s recommen-
dation.
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All trailer lights work as required by law.
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All lights work each time you connect them.
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The trailer ball is set at the proper height for the coupler on the trailer.
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The trailer is level when it is hitched.
Do not drive if the trailer is not level, and check for improper tongue weight,
overloading, worn suspension, or other possible causes.
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The trailer cargo is securely loaded.
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The rear view mirrors conform to all applicable federal, state/provincial or
local regulations. If they do not, install rear view mirrors appropriate for tow-
ing purposes.
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Break-in schedule
If your vehicle is new or equipped with any new power train components
(such as an engine, transmission, differential or wheel bearing), Toyota rec-
ommends that you do not tow a trailer until the vehicle has been driven for
over 500 miles (800 km).
After the vehicle has been driven for over 500 miles (800 km), you can start
towing. However, for the next 500 miles (800 km), drive the vehicle at a speed
of less than 50 mph (80 km/h) when towing a trailer, and avoid full throttle
acceleration.
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Maintenance
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If you tow a trailer, your vehicle will require more frequent maintenance due
to the additional load. (See “Scheduled Maintenance Guide” or “Owner’s
Manual Supplement”.)
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Retighten the fixing bolts of the towing ball and bracket after approximately
600 miles (1000 km) of trailer towing.
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If trailer sway occurs
One or more factors (crosswinds, passing vehicles, rough roads, etc.) can
adversely affect handling of your vehicle and trailer, causing instability.
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If trailer swaying occurs:
• Firmly grip the steering wheel. Steer straight ahead.
Do not try to control trailer swaying by turning the steering wheel.
• Begin releasing the accelerator pedal immediately but very gradually to
reduce speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehicle
and trailer should stabilize.
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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 appropriate, 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 prevent instability. Remember that swaying of the
towing vehicle-trailer increases as speed increases.
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WARNING
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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 stability
and braking performance 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
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Do not exceed the TWR, unbraked TWR, GCWR, GVWR or GAWR.
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If the gross trailer weight is over 2000 lb. (907 kg), a sway control device
with sufficient capacity is required.
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Adjust the tongue weight within the appropriate range. Place heavier loads
as close to the trailer axle as possible.
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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,
whichever 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 reducing a certain speed, slow
down and make sure you keep your vehicle speed under the speed of
which you experience the instability.
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Do not make jerky, abrupt or sharp turns.
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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.
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Do not exceed the trailer hitch assembly weight, gross vehicle weight,
gross axle weight and trailer tongue weight capacities.
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WARNING
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To avoid accident or injury
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Do not use cruise control when towing.
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Slow down and downshift before descending steep or long downhill
grades. Do not make sudden downshifts while descending steep or long
downhill grades.
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Vehicle-trailer instability 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.
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Vehicles with compact spare tire: Do not tow a trailer when the compact
spare tire is installed on your vehicle.
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Hitch
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 determine 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.
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When towing a trailer
Toyota recommends trailers with brakes that conform to any applicable fed-
eral and state/provincial regulations.
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If the gross trailer weight exceeds unbraked TWR, trailer brakes are
required. Toyota recommends trailers with brakes that conform to all appli-
cable federal and state/provincial regulations.
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Never tap into your vehicle’s hydraulic system, as this will lower the vehi-
cle’s braking effectiveness.
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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 wandering into another lane.
NOTICE
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When installing a trailer hitch
Use only the position recommended by your Toyota dealer. Do not install
the trailer hitch on the bumper; this may cause body damage.
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Do not directly splice trailer lights
Do not directly splice trailer lights. Directly splicing trailer lights may damage
your vehicle’s electrical system and cause a malfunction.
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Dinghy towing
Your vehicle is not designed to be dinghy towed (with 4 wheels
on the ground) behind a motor home.
NOTICE
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To avoid serious damage to your vehicle
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To prevent causing serious damage to the transaxle and Active Torque
Control 4WD system (AWD models)
Do not tow your vehicle with four wheels
on the ground.
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2WD models: Never tow this vehicle from
the rear with the front wheels on the
ground. This may cause serious damage
to the transaxle.
AWD models: Never tow this vehicle with
any of the wheels on the ground. This
may cause serious damage to the tran-
saxle and Active Torque Control 4WD
system.
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