height TOYOTA SIENNA HYBRID 2021 Owners Manual (in English)

391-1. For safe use
1
For safety and security
■Automatic locking retractor
(ALR)
When a passenger’s shoulder belt is
completely extended and then
retracted even slightly, the belt is
locked in that position and cannot
be extended. This feature is used to
hold a child restraint system (CRS)
firmly. To free the belt again, fully
retract the belt and then pull the belt
out once more.
Push the seat belt shoulder
anchor up and down while
pressing the release button .
After releasing the button, make
sure the adjuster is locked in the
position by trying t o move it up and
down.
The pretensioners help the seat
belts to quickly restrain the
occupants by retracting the seat
belts when the vehicle is sub-
jected to certain types of severe
frontal or side collision or a vehi-
cle rollover.
The pretensioners do not activate
in the event of a minor frontal
impact, a minor s ide impact or a
rear impact.
WARNING
■When using the third center
seat belt
Do not use the third center seat
belt with either buckle released.
Fastening only one of the buckles
may result in death or serious
injury in case of sudden braking,
sudden swerving or an accident.
Adjusting the seat belt
shoulder anchor height
(front and second outside
seats [8-passenger mod-
els])
A
:$51,1*
■Adjustable shoulder anchor
Always make sure the shoulder
belt is positioned across the cen-
ter of your shoulder. The belt
should be kept away from your
neck, but not falling off your
shoulder. Failure to do so could
reduce the amount of protection in
an accident and cause death or
serious injuries in the event of a
sudden stop, sudden swerve or
accident.
Seat belt pretensioners
(front seats)

1693-3. Adjusting the seats
3
Before driving
3-3.Adjusting the seats
Manual seat (passenger’s
side only)Seat position adjustment
lever
Seatback angle adjustment
lever
Power seatSeat position adjustment
switch
Seatback angle adjustment
switch
Seat cushion (front) angle
adjustment switch (driver’s
side only)
Vertical height adjustment
switch (driver’s side only)
Lumbar support adjustment
switch (driver’s side only) (if
equipped)
Pelvic support adjustment
(driver’s side only) (if
equipped)
■When adjusting the seat
●Make sure that any surrounding
passengers or objects are not
contacting the seat.
●Take care when adjusting the seat
so that the head restraint does not
touch the ceiling.
Front seats
The seats can be adjusted
(longitudinally, vertically,
etc.). Adjust the seat to
ensure the correct driving
posture.
Adjustment procedure
A
B
A
B
C
D
E
F

1823-3. Adjusting the seats
■Front and second outside
seats
1 Up
Pull the head restraints up.
2Down
Push the head restraint down while
pressing the lock release button .
■Second center* and third
center seats
1 Up
Pull the head restraints up.
2Down
Push the head restraint down while
pressing the lock release button
.
*: 8-passenger models only
■Third outside seats
1 To use
Pull the head restraints up.
2To fold
Press the button.
■Adjusting the height of the head
restraints (Front and second
outside seats)
Make sure that the head restraints
are adjusted so that the center of
the head restraint i s closest to the
Head restraints
Head restraints are pro-
vided for all seats.
WARNING
■Head restraint precautions
Observe the following precautions
regarding the head restraints.
Failure to do so m ay result in
death or serious injury.
●Use the head restraints
designed for each respective
seat.
●Adjust the head restraints to the
correct position at all times.
●After adjusting the head
restraints, push down on them
and make sure they are locked
in position.
●Do not drive with the head
restraints removed.
Vertical adjustment
A
A

1833-3. Adjusting the seats
3
Before driving
top of your ears.
■Adjusting the center seat head
restraint
Always raise the head restraint one
level from the stowed position when
using.
■Front and second outside
seats
Pull the head restraint up while
pressing the lock release button .
If the head restraint touches the
ceiling, making the removal difficult,
change the seat height or angle.
( P.169)
■Second center* and third
center seats
Pull the head restraint up while
pressing the lock release button .
*: 8-passenger models only
■Third outside seats
The head restraint cannot be
removed.
■Front and second outside
seats
Align the head restraint with the
installation holes and push it
down to the lock position.
Press and hold the lock release
button when lowering the
head restraint.
■Second center* and third
center seats
Align the head restraint with the
installation holes and push it
down to the lowest lock position.
Removing the head
restraints
A
A
,QVWDOOLQJWKHKH\
DG
UHVWUDLQWV
A

1863-4. Adjusting the steering wheel and mirrors
To sound the horn, press on or
close to the mark.
*: If equipped
The height of the rear view mir-
ror can be adjusted to suit your
driving posture.
Adjust the height of the rear
view mirror by moving it up and
down.
WARNING
■Caution while driving
Do not adjust the steering wheel
while driving.
Doing so may cause the driver to
mishandle the vehicle and cause
an accident, resul ting in death or
serious injury.
■After adjusting the steering
wheel (manual type)
Make sure that the steering wheel
is securely locked.
Otherwise, the steering wheel
may move suddenly, possibly
causing an accident, and resulting
in death or serious injury. Also,
the horn may not sound if the
steering wheel is not securely
locked.
Sounding the horn
Inside rear view mir-
ror*
The rear view mirror’s posi-
tion can be adjusted to
enable sufficient confirma-
tion of the rear view.
Adjusting the height of
rear view mirror
WARNING
■Caution while driving
Do not adjust the position of the
mirror while driving.
Doing so may lead to mishandling
of the vehicle and cause an acci-
dent, resulting in death or serious
injury.

1903-4. Adjusting the steering wheel and mirrors
driving, make sure the back door
is closed.
●If the display is difficult to see due
to reflected light, close the sun-
shade for the moon roof (if
equipped).
●Any of the following conditions
may occur when driving in the
dark, such as at night. None of
them indicates that a malfunction
has occurred.
• Colors of objects in the displayed image may differ from their actual
color.
• Depending on the height of the lights of the vehicle behind, the
area around the vehicle may
appear white and blurry.
• Automatic image adjustment for
brighter surrounding image may
cause flickering.
If it is difficult to see the displayed
image or flickering bothers you,
change to optical mirror mode.
●The Digital Rear-view Mirror may
become hot while it is in digital
mirror mode.
This is not a malfunction.
●Depending on your physical con-
dition or age, it may take longer
than usual to focus on the dis-
played image. In this case,
change to optical mirror mode.
●Do not let passengers stare at the
displayed image when the vehicle
is being driven, as doing so may
cause motion sickness.
■When the system malfunctions
If the symbol show n in the illustra-
tion is displayed when using the
Digital Rear-view Mirror in digital
mirror mode, the system may be
malfunctioning. Th e symbol will dis-
appear in a few seconds. Operate
the lever, change to optical mirror
mode and have the vehicle
inspected by your Toyota dealer.
■Adjusting the mirror height
The height of the rear view mir-
ror can be adjusted to suit your
driving posture.
Change to optical mirror mode,
adjusting the height of the rear
view mirror by moving it up and
down.
■Display settings (digital
mirror mode)
Settings of the display in the dig-
ital mirror mode, on/off opera-
tion of the automatic anti-glare
function, etc. can be changed.
1 Press the menu button.
Adjusting the mirror

2204-1. Before driving
■Before towing
Check that the fo llowing conditions
are met:
●Ensure that your vehicle’s tires
are properly inflated. ( P.525)
●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.
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.

2264-1. Before driving
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 tr ailer 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 diame-
ter size.
■Matching trailer ball height to
trailer coupler height
No matter wh ich class of tow hitch
applies, for a safe trailer hookup, the
trailer ball setup on must be proper
height for the coup ler on the trailer.
Coupler
Trailer ball
Please consult your dealer
when installing trailer lights, as
Positions for towing hitch
receiver
Selecting trailer ball
A
B
A
B
Trailer classTypical trailer ball size
II2 in.
I1 7/8 in.
Connecting trailer lights
C
D
A
B

2734-5. Using the driving support systems
4
Driving
• If a detectable object makes an abrupt maneuver (such as sudden
swerving, accelera tion or deceler-
ation)
• When your vehicle approaches a detectable object rapidly
• When a detectable object is not directly in front of your vehicle
• When a detectable object is near a wall, fence, guardrail, manhole
cover, vehicle, steel plate on the
road, etc.
• When a detectable object is under a structure
• When part of a detectable object is hidden by an object, such as
large baggage, an umbrella, or
guardrail
• When multiple detectable objects are close together
• If the sun or other light is shining directly on a detectable object
• When a detectable object is a
shade of white and looks
extremely bright
• When a detectable object appears
to be nearly the same color or
brightness as its surroundings
• If a detectable object cuts or sud-
denly emerges in front of your
vehicle
• When the front of your vehicle is
hit by water, snow, dust, etc.
• When a very bright light ahead, such as the sun or the headlights
of oncoming traffic, shines directly
into the front camera
• When approaching the side or front of a vehicle ahead
• If a vehicle ahead is a motorcycle
• If a vehicle ahead is narrow, such as a personal mobility vehicle
• If a preceding vehicle has a small rear end, such as an unloaded truck
• If a preceding vehicle has a low rear end, such as a low bed trailer
• If a vehicle ahead has extremely high ground clearance
• If a vehicle ahead is carrying a load which protrudes past its rear
bumper
• If a vehicle ahead is irregularly shaped, such as a tractor or side
car
• If a vehicle ahead is a child sized bicycle, a bicycle that is carrying a
large load, a bicycle ridden by
more than one person, or a
uniquely shaped bicycle (bicycle
with a child seat, tandem bicycle,
etc.)
• If a pedestrian/or the riding height
of a bicyclist ahead is shorter than
approximately 3.2 ft. (1 m) or taller
than approximate ly 6.5 ft. (2 m)
• If a pedestrian/bic yclist is wearing
oversized clothing (a rain coat,
long skirt, etc.), making their sil-
houette obscure
• If a pedestrian is bending forward or squatting or bicyclist is bending
forward
• If a pedestrian/bicyclist is moving fast
• If a pedestrian is pushing a
stroller, wheelchair, bicycle or
other vehicle
• When driving in inclement weather

3054-5. Using the driving support systems
4
Driving
when driving on the edge of a
lane, and the vehicle in an adja-
cent lane is far away from your
vehicle
• When an accessory (such as a hitch-mounted bicycle carrier) is
installed to the r ear of the vehicle
• When the vehicle is heavily loaded in the luggage compart-
ment
• When there is a significant differ- ence in height between your vehi-
cle and the vehicle that enters the
detection area
• Immediately after the BSM func-
tion/RCTA function are turned on
• When towing a trailer
●Instances of the BSM function
unnecessarily detecting a vehicle
and/or object may increase in the
following situations:
• When the sensor is misaligned
due to a strong impact to the sen-
sor or its surrounding area
• When the distanc e between your
vehicle and a guar drail, wall, etc.
that enters the detection area is
short
• When driving up and down con-
secutive steep inclines, such as
hills, dips in the road, etc.
• When vehicle lanes are narrow, or
when driving on the edge of a
lane, and a vehicle traveling in a
lane other than the adjacent lanes
enters the detection area
• When driving on roads with sharp bends, consecutive curves, or
uneven surfaces
• When the tires are slipping or spinning
• When the distanc e between your
vehicle and a following vehicle is
short
• When an accessory (such as a hitch-mounted bicycle carrier) is
installed to the r ear of the vehicle
• When the vehicle throws up water
or snow behind.
■Operation of the RCTA
function
The RCTA function uses radar
sensors to detect vehicles
approaching from the right or left
at the rear of the vehicle and
alerts the driver of the presence
of such vehicles by flashing the
outside rear view mirror indica-
tors and sounding a buzzer.
Approaching vehicles
Detection areas
■RCTA icon display (if
equipped)
When a vehicle approaching
from the right or left at the rear
of the vehicle is detected, the
following will be displayed on
the audio system screen.
 When the Toyota parking
assist monitor (if equipped) is
displayed
The Rear Cross Traffic
Alert function (if
equipped)
A
B