TOYOTA SIENNA HYBRID 2023 Owners Manual

2194-1. Before driving
4
Driving
load
As shown in the example above,
if the number of occupants
increases, the cargo and lug-
gage 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 num-
ber of occupants causes an
excess of the total load capacity
(combined weight of occupants
plus cargo and luggage load),
you must reduce the cargo and
luggage on your vehicle.
■Roof luggage carrier com-
ponentsRoof rails
Cross rails
Roof luggage carrier (if
equipped)
A
B
:$51,1*
■When loading cargo on the
roof luggage carrier
To use the roof ra ils as a roof lug-
gage carrier, you m ust fit the roof
rails with two or more genuine
Toyota cross rails or their equiva-
lent. When you load cargo on the
roof luggage carrier, observe the
following:
●Place the cargo so that its
weight is distributed evenly
between the front and rear
axles.
●If loading long or wide cargo,
never exceed the vehicle overall
length or width. ( P.516)
●Before driving, m ake sure the
cargo is securely fastened on
the roof luggage carrier.
●Loading cargo on the roof lug-
gage carrier will make the cen-
ter of gravity of the vehicle
higher. Avoid high speeds, sud-
den starts, sharp turns, sudden
braking or abrupt maneuvers,
otherwise it may result in loss of
control or vehicle rollover due to
failure to operate this vehicle
correctly and result in death or
serious injury.
●If driving for a long distance, on
rough roads, or at high speeds,
stop the vehicle now and then
during the trip to make sure the
cargo remains in its place.
●Do not exceed 150 lb. (68 kg)
cargo weight on the roof lug-
gage carrier. Place the cargo so
that its weight is distributed
evenly between both cross rails.

2204-1. Before driving
Cargo capacity
Weight of the removed sec-
ond center seat
If removing the second center
seat, it is possible to load extra
cargo equal to the weight of the
removed seat.
(Cargo capacity) = (Total load
capacity) - (Total weight of occu-
pants) + (Weight of the removed
second center seat)
Second center seat weight:
Fabric
17.76 lb. (8.06 kg)
Synthetic leather
17.89 lb. (8.12 kg)
■Total load capacity and seating
capacity
These details are also described on
the tire and loading information
label. ( P.435)
NOTICE
■When loading cargo on the
roof luggage carrier
Be careful not to scratch the sur-
face of the moon roof (if
equipped).
Seating configuration
variation (8-passenger
models only)
A
B
Vehicle load limits
Vehicle load limits include
total load capacity, seating
capacity, TWR (Trailer
Weight Rating) and cargo
capacity.
 Total load capacity (vehicle
capacity weight):  P.516
Total load capacity means the
combined weight of occu-
pants, cargo and luggage.
 Seating capacity:  P.517
Seating capacity means the
maximum number of occu-
pants whose estimated aver-
age weight is 150 lb. (68 kg)
per person.
 TWR (Trailer Weight Rat-
ing):  P.226, 516
TWR means the maximum
gross trailer weight (trailer
weight plus its cargo weight)
that your vehicle is able to
tow.
 Cargo capacity
Cargo capacity may increase
or decrease depending on the
weight and the number of
occupants.

2214-1. Before driving
4
Driving
WARNING
■Overloading the vehicle
Do not overload the vehicle. It
may not only cause damage to
the tires, but also degrade steer-
ing and braking ability, resulting in
an accident.
Trailer towing (with-
out towing package)
Toyota does not recom-
mend towing a trailer with
your vehicle. Toyota also
does not recommend the
installation of a tow hitch or
the use of a tow hitch carrier
for a wheelchair, scooter,
bicycle, etc. Your vehicle is
not designed for trailer tow-
ing or for the use of tow
hitch mounted carriers.

2224-1. Before driving
■Before towing
Check that the fo llowing conditions
are met:
●Ensure that your vehicle’s tires
are properly inflated. ( P.523)
●Trailer tires are inflated according
to the trailer manufacturer’s rec-
ommendation.
●All trailer lights work as required
by law.
●All lights work each time you con-
nect them.
●The trailer ball is set at the proper
height for the coupler on the
trailer.
●The trailer is level when it is
hitched.
Do not drive if th e trailer is not
level, and check for improper
tongue weight, overloading, worn
suspension, or other possible
causes.
●The trailer cargo is securely
loaded.
●The rear view mirr ors conform to
all applicable fede ral, state/provin-
cial or local regulations. If they do
not, install rear view mirrors
appropriate for towing purposes.
■When towing a trailer
Disable the following systems, as
the systems may no t operate prop-
erly.
●LTA (Lane Tracing Assist)
(  P.278)
Trailer towing (with
towing package)
Your vehicle is designed
primarily as a passenger-
and-load-carrying vehicle.
Towing a trailer can have an
adverse impact on handling,
performance, braking, dura-
bility, and fuel consump-
tion. For your safety and the
safety of others, you must
not overload your vehicle or
trailer. You must also
ensure that you are using
appropriate towing equip-
ment, that the towing equip-
ment 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 set-
ting, 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 characteris-
tics and operating condi-
tions.
Toyota warranties do not
apply to damage or mal-
function caused by towing a
trailer for commercial pur-
poses.
Contact your Toyota dealer for
further information about addi-
tional requirements such as a
towing kit, etc.

2234-1. Before driving
4
Driving
●Dynamic radar cruise control with
full-speed range (P.291)
●PKSB (Parking Support Brake) (if
equipped) ( P.324)
●BSM (Blind Spot Monitor) (if
equipped) ( P.302)
●Intuitive parking assist (if
equipped) ( P.312)
●RCTA (Rear Cross Traffic Alert)
function (if equipped) ( P.308)
●RCD (Rear Camera Detection)
function (if equipped) ( P.320)
WARNING
■Trailer towing precautions
To tow a traile r safely, use
extreme care and drive the vehi-
cle in accordance with the trailer’s
characteristics and operating con-
ditions. 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
●Do not exceed the TWR,
unbraked TWR, GCWR, GVWR
or GAWR.
●Vehicles without spare tire: Do
not tow a trailer when the tire
installed is re paired with the
emergency tire puncture repair
kit.
●If the gross trailer weight is over
2000 lb. (907 kg), a sway con-
trol device with sufficient capac-
ity 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 spee d 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 sur-
face, etc. to help avoid an acci-
dent. 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.
●Do not make jer ky, abrupt or
sharp turns.
●Do not apply the brakes sud-
denly as you may skid, resulting
in jackknifing and loss of vehicle
control. This is especially true
on wet or slippery surfaces.
●Do not exceed the trailer hitch
assembly weight, gross vehicle
weight, gross axle weight and
trailer tongue w eight capacities.
●Do not use dynamic radar
cruise control with full-speed
range when towing.
●Slow down and downshift
before descending steep or long
downhill grades. Do not make
sudden downshifts while
descending steep or long down-
hill grades.

2244-1. Before driving
■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).
■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.
WARNING
●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 down-
hill grades. Avoid holding the
brake pedal down too long or
applying the brakes too fre-
quently. This could cause the
brakes to overheat and result in
reduced braking efficiency.
●Vehicles with compact spare
tire: Do not tow a trailer when
the compact spare tire is
installed on your vehicle.
■When towing a trailer
Toyota recommends trailers with
brakes that confor m to any appli-
cable federal and state/provincial
regulations.
●If the gross trailer weight
exceeds unbraked TWR, trailer
brakes are required. Toyota rec-
ommends trailers with brakes
that conform to all applicable
federal and state/provincial reg-
ulations.
●Never tap into y our 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 traile r and the vehi-
cle. If damage occurs to the
coupling unit or hitch ball, there
is danger of the trailer wander-
ing into another lane.
Towing related terms

2254-1. Before driving
4
Driving
■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
■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, hitch and hitch systems (if required).
Additional optional equipment, pas-
sengers and cargo in the vehicle
will reduce the trailer weight rating
so as not to exceed GCWR, GVWR
and GAWR.
If the gross traile
r weight exceeds
3000 lb. (1360 kg ), it is recom-
mended to use a trailer with 2 or
more axles.
(With brakes)
■Unbraked TWR (Unbraked
Trailer Weight Rating)
The trailer weight rating for tow-
ing a trailer without a trailer ser-
vice brake system.
(Without brakes)
■Tongue Weight
The load placed on the trailer
hitch ball. ( P.227)
A
B
A
A

2264-1. Before driving
The gross trailer weight must
never exceed 3500 lb. (1585
kg)
*.
*: The towing package is required.
Toyota does no t recommend tow-
ing with this vehicle without the tow-
ing package.
 The gross combination weight
must never exceed the
GCWR described below:
2WD models
8818 lb. (4000 kg)
*

AWD models
8995 lb. (4080 kg)
*
*
: The towing package is required.
Toyota does no t recommend tow-
ing with this vehicle without the tow-
ing package.
 The gross vehicle weight
must never exceed the
GVWR indicated on the Certi-
fication Label.
 The gross axle weight on
each axle must never exceed
the GAWR indicated on the
Certification Label. 
If the gross trailer weight is
over the unbraked TWR,
trailer service brakes are
required.
 If the gross trailer weight is
over 2000 lbs. (907 kg), a
sway control device with suffi-
cient capacity is required.
Confirm that the gross trailer
weight, gross combination
weight, gross vehicle weight,
gross axle weight and tongue
weight are all within the limits.
■GCWR*
2WD models
8818 lb. (4000 kg)
AWD models
8995 lb. (4080 kg)
*: This model meets the tow-vehicle trailering requirement of SAE
International per SAE J2807.
The towing package is required.
Toyota does not recommend tow-
ing with this vehicle without the tow-
ing package.
Weight limits
GCWR, TWR and
Unbraked TWR

2274-1. Before driving
4
Driving
■TWR*
3500 lb. (1585 kg)
*: This model meets the tow-vehicle trailering requirement of SAE
International per SAE J2807.
The towing package is required.
Toyota does no t recommend tow-
ing with this vehicle without the tow-
ing package.
■Unbraked TWR*
1000 lb. (450 kg)
*: This model meets the tow-vehicle trailering 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
distributed so that the tongue
weight is 9% to 11%.
(Tongue weight /Gross trailer
weight x 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 station, building supply
company, trucking company,
junk yard, etc.
Trailer hitch assemblies have
different weight capacities.
Toyota recommends the use of
Toyota hitch/bracket for your
vehicle. For details, contact your
Toyota dealer.
 If you wish to install a trailer
hitch, contact your Toyota
dealer.
 Use only a hitch that con-
forms 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.
Trailer Tongue Weight
Hitch (if equipped)
A
B

2284-1. Before driving
Remove the hitch ball when-
ever you are not towing a
trailer. Remove the trailer
hitch if you do not need it.
After removing the hitch, seal
any mounting holes in the
vehicle body to prevent entry
of any substances into the
vehicle.
Weight carrying ball position:
48.8 in. (1238.8 mm)
Hitch receiver pin hole posi-
tion: 42.5 in. (1079.7 mm)
Use the correct trailer ball for
your application.
Trailer ball load rating
Matches or exceeds the gross
trailer weight rat ing of the trailer.
Ball diameter
Matches the size of the trailer cou-
pler. Most couplers are stamped
with the required t railer ball size.
WARNING
■Hitch
Trailer hitch assemblies have dif-
ferent weight capacities estab-
lished 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 pa rticular 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.
NOTICE
■When installing a trailer hitch
Use only the position recom-
mended by your Toyota dealer.
Do not install the trailer hitch on
the bumper; this may cause body
damage.
Positions for towing hitch
receiver
Selecting trailer ball
A
B
A
B