Page 95 of 872
95
1
Before driving
SIENNA_OM_OM45483U_(U)
1-3. Adjustable components (seats, mirrors, steering wheel)
Front seats
Manual seat
Seat position adjustment
lever
Seatback angle adjustment
lever
Vertical height adjustment
lever (driver’s side only)
Lumbar support adjustment
switch (driver’s side only)*
*: if equipped
Page 96 of 872
96 1-3. Adjustable components (seats, mirrors, steering wheel)
SIENNA_OM_OM45483U_(U)
Power seat
Seat 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)
Page 99 of 872

99
1-3. Adjustable components (s
eats, mirrors, steering wheel)
1
Before driving
SIENNA_OM_OM45483U_(U)
■Active head restraints
Even small forces applied to the seatback may cause the head restraint to
move. When a locked head restraint is pushed up forcibly, the head restraint
inner structure may appear. This does not indicate a problem.
CAUTION
■Seat adjustment
●To reduce the risk of sliding under the lap belt during a collision, do not
recline the seat more than necessary.
If the seat is reclined too far, the lap belt may slide past the hips and apply
restraint forces directly to the abdomen or your neck may contact the
shoulder belt, increasing the risk of death or serious injury in the event of
an accident.
Adjustments should not be made while driving as the seat may unexpect-
edly move and cause the driver to lose control of the vehicle.
● Manual seat: After adjusting the seat, make sure that the seat is locked in
position.
ITN13N066
During
rear-end
collision
Inner structure
Page 100 of 872
100
1-3. Adjustable components (seats, mirrors, steering wheel)
SIENNA_OM_OM45483U_(U)
Rear seats
■Second seats
Tip-up seat (7-passenger models) Seat position adjustment
lever
Seatback angle adjustment
lever
Tip-up seat (8-passenger models) Seat position adjustment
lever
Seatback angle adjustment
lever
Page 101 of 872
101
1-3. Adjustable components (s
eats, mirrors, steering wheel)
1
Before driving
SIENNA_OM_OM45483U_(U)
Ottoman seat
Seat position adjustment
lever
Seatback angle adjustment
lever
Ottoman angle adjustment
lever
AUTO ACCESS SEAT
Refer to “AUTO ACCESS SEAT OWNER’S MANUAL”.
Page 102 of 872
102 1-3. Adjustable components (seats, mirrors, steering wheel)
SIENNA_OM_OM45483U_(U)
■Third seats
Manual seat Seatback angle adjustment
strap
Power seat Seatback angle adjustment
switch
Page 105 of 872
105
1-3. Adjustable components (s
eats, mirrors, steering wheel)
1
Before driving
SIENNA_OM_OM45483U_(U)
Removing the second seats
■ Removing the second outside seats (Tip-up seats)
Pull the armrests up.
Pull the seatback adjustment
lever and fold down the seat-
back. The cushion will tip up.
Slide the seat forward to a lock position. Pull the release lever under the
cushion and simultaneously lift
the seat to remove.
STEP1
STEP2
STEP3
Page 106 of 872
106 1-3. Adjustable components (seats, mirrors, steering wheel)
SIENNA_OM_OM45483U_(U)■
Removing the second seats (Ottoman seats)
Pull the armrests up.
Pull the seatback adjustment
lever and fold down the seat-
back.
Slide the seat to a forward lock position. Pull the release lever behind the
seatback straight back, then up.
While moving the lever up,
simultaneously lift the seat to
remove.
STEP1
STEP2
STEP3