
341-1. For safe use
SIENNA_OM_OM08007U_(U)
WARNING
■When children are in the vehicle
Do  not  allow  children  to  play  with  the  seat  belt.  If  the  seat  belt  becomes
twisted around a child’s neck, it may lead to choking or other serious injuries
that could result in death. 
If this occurs and the buckle cannot be unfastened, scissors should be used
to cut the belt.
■ Seat belt pretensioners (front seats)
●Do  not  place  anything,  such  as  a  cushion,  on  the  front  passenger’s  seat.
Doing so will disperse the passenger’s weight, which prevents the sensor
from  detecting  the  passenger’s  weight  properly.  As  a  result,  the  seat  belt
pretensioner for the front passenger’s seat may not activate in the event of
a collision.
● If  the  pretensioner  has  activated,  the  SRS  warning  light  will  come  on.  In
that  case,  the  seat  belt  cannot  be  used  again  and  must  be  replaced  at
your Toyota dealer.
■ Adjustable shoulder an chor (front and second outside Tip-up seats)
Always make sure the shoulder belt is positioned across the center 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. ( P. 31)
■ Seat belt damage and wear
●Do  not  damage  the  seat  belts  by  allowing  the  belt,  plate,  or  buckle  to  be
jammed in the door.
● Inspect the seat belt system periodically. Check for cuts, fraying, and loose
parts.  Do  not  use  a  damaged  seat  belt  until  it  is  replaced.  Damaged  seat
belts cannot protect an occupant from death or serious injury.
● Ensure that the belt and plate are locked and the belt is not twisted.
If the seat belt does not function correctly, immediately contact your Toyota
dealer.
● Replace  the  seat  assembly,  including  the  belts,  if  your  vehicle  has  been
involved in a serious accident, even if there is no obvious damage.
● Do  not  attempt  to  install,  remove,  modify,  disassemble  or  dispose  of  the
seat belts. Have any necessary repairs carried out by your Toyota dealer.
Inappropriate handling may lead to incorrect operation. 

541-1. For safe use
SIENNA_OM_OM08007U_(U)
WARNING
■Front passenger occupant classification system precautions
●Do  not  recline  the  front  passenger  seatback  so  far  that  it  touches  a  rear
seat. This may cause the “AIR BAG OFF” indicator light to be illuminated,
which  indicates  that  the  SRS  airbags  for  the  front  passenger  will  not  acti-
vate  in  the  event  of  a  severe  accident.  If  the  seatback  touches  the  rear
seat,  return  the  seatback  to  a  position  where  it  does  not  touch  the  rear
seat. Keep the front passenger seatback as upright as possible  when the
vehicle  is  moving.  Reclining  the  seatback  excessively  may  lessen  the
effectiveness of the seat belt system.
● If  an  adult  sits  in  the  front  passenger  seat,  the  “AIR  BAG  ON”  indicator
light  is  illuminated.  If  the  “AIR  BAG  OFF”  indicator  is  illuminated,  ask  the
passenger  to  sit  up  straight,  well  back  in  the  seat,  feet  on  the  floor,  and
with  the  seat  belt  worn  correctly.  If  the  “AIR  BAG  OFF”  indicator  still
remains illuminated, either ask the passenger to move to the rear seat, or
if that is not possible, move the front passenger seat fully rearward.
● When it is unavoidable to install a forward-facing child restraint system on
the front passenger seat, install the child restraint system on the front pas-
senger seat in the proper order. ( P. 60)
● Do not modify or remove the front seats.
● Do not kick the front passenger seat or subject it to severe impact. Other-
wise, the SRS warning light may come on to indicate a malfunction of the
front  passenger  occupant  classification  system.  In  this  case,  contact  your
Toyota dealer immediately.
● Child  restraint  systems  installed  on  the  rear  seat  should  not  contact  the
front seatbacks.
● Do not use a seat accessory, such as a cushion and seat cover, that cov-
ers the seat cushion surface.
● Do not modify or replace the upholstery of the front seat. 

156
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3-3. Adjusting the 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  simulta-
neously  lift  the  seat  to
remove.
■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  st raight  back,
then  up.  While  moving  the
lever  up,  simultaneously  lift
the seat to remove.
Removing the second seats
1
2
3
1
2
3 

SIENNA_OM_OM08007U_(U)
1573-3. Adjusting the seats
3
Operation of each component
■Removing the second center seat (if equipped)Pull  the  lock  release  strap
and  fold  down  the  second
center seatback.
Make  sure  that  the  head
restraint is in the lowest position.
Pull  the  lock  release  strap
under the seat to remove the
seat. 
Retract the cushion leg.
Stow  the  seat  in  the  storage
box  of  the  luggage  room
(cushion side first). 
Engage the stow latch buckle
to  hold  the  seat  and  tighten
the latch strap.
1
2
3 

SIENNA_OM_OM08007U_(U)
1613-3. Adjusting the seats
3
Operation of each component
■Folding down the third seatbacks
Press  the  folding/returning
switch.
■Returning the third seatbacks
Press  the  folding/returning  switch,  returning  switch  (P.  164)  or
seatback angle adjustment switch ( P. 154).
Before stowing or returning third seat, remove any items from the floor
area to prevent interference with moving parts.
■Before stowing the third seats Lower  the  center  head
restraint  to  the  lowest  posi-
tion  ( P.  173),  and  stow  the
seat belt buckles.
Stow the center seat belt. ( P.   3 0 )
Stowing the third seats (manual seats)
1
2 

SIENNA_OM_OM08007U_(U)
1633-3. Adjusting the seats
3
Operation of each component
■Returning the third seatsReturn the flaps. 
Pull the handle and lift up the
seat rearward.
Push  the  seat  forward  and
then  engage  the  front  leg
locks.
Make  sure  the  front  and  rear
legs are locked securely.
Raise the seatback and the outside head restraints. ( P. 159)
You  can  operate  the  power  third  seats  when  the  shift  lever  is  in  P.
Before stowing or returning third seat, remove any items from the floor
area to prevent interference with moving parts.
■Before stowing the third seats Lower  the  center  head
restraint  to  the  lowest  posi-
tion  ( P.  173)  and  stow  the
seat belt buckles.
Stow the center seat belt. ( P.   3 0 )
1
2
Stowing the third seats (power seats)
3
1
2 

SIENNA_OM_OM08007U_(U)
1653-3. Adjusting the seats
3
Operation of each component
■Power third seat (vehicles  with power third seat)
● If the indicator light above the switches flashes three times when the folding/
returning  switch  is  pressed,  the  folding  operation  will  not  start.  Make  sure
the shift lever is in P.
● If any of  the following conditions occur while  the seat is  operating, the seat
operation  will  stop.  The  indicator  light  above  the  switches  will  flash  three
times and a beep will sound for about 10 seconds:
• An object is caught between the seatback and seat cushion.
• The stowing switch is released.
• Other  power  third  seat  switch  is  pushed  while  operating  the  stowing
switch.
• The  shift  lever  is  moved  from  P  when  the  engine  switch  is  turned  to  the “ON”  position  (vehicles  without  a  smart  key  system)  or  IGNITION  ON
mode (vehicles with a smart key system).
If  the  engine  is  started  during  operating,  the  seat  operation  may  also  be
stopped.
To continue the folding operation, the seatback must be returned to its orig-
inal position first.
■ AUTO ACCESS SEAT (if equipped)
The AUTO ACCESS SEAT cannot be removed.
■ “3RD SEAT” warning light ( vehicles with power third seat)
The  warning  light  comes  on  if  the  third
seat  operation  is  not  yet  complete  when
the  engine  switch  is  turned  to  the  “ON”
position (vehicles without a smart key sys-
tem)  or  IGNITION  ON  mode  (vehicles
with a smart key system). 

166
SIENNA_OM_OM08007U_(U)
3-3. Adjusting the seats
WARNING
■When folding the rear seatbacks down
Observe  the  following  precautions.  Failure  to  do  so  may  result  in  death  or
serious injury.
●Do not fold the seatbacks down while driving.
● Stop  the  vehicle  on  level  ground,  set  the  parking  brake  and  shift  the  shift
lever to P.
● Do not allow anyone to sit on a folded seatback or in the luggage compart-
ment while driving.
● Do not allow children to enter the luggage compartment.
● Be careful not to get any part of your body pinched by a seat.
■ Seat adjustment
●Be careful that the seat does not hit passengers or luggage.
● 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.
■ After returning the rear seatbacks or installing seats
Observe  the  following  precautions.  Failure  to  do  so  may  result  in  death  or
serious injury.
●Make sure the seatback is securely locked by pushing it forward and rear-
ward on the top.
● Check that the seat belts are not twisted or caught in the seatback.
● Make sure the seat is locked in place by trying to shake the seatback and
lift up the seat cushion.
■ Removing the second seats
●Do not leave a seat in the vehicle if it has been disengaged from the floor.
● Do not sit on or place anything on a seat that has been removed from the
vehicle.