2003 TOYOTA SIENNA Owners Manual

03 SIENNA_U (L/O 0207)
2212003 MY SIENNA (OM45410U)
The cup holder is designed for holding
cups or drinkcans securely.
To use the holder, push the button.
CAUTION
Do not place anything else other
than cups or drinkcans in the cup
holder, as such items may be
thrown about in the compartment
and possibly injure people in the
vehicle during sudden braking or in
an accident.
To reduce the chance of injury in
case of an accident or sudden stop
while driving, keep the cup holder
closed when it is not in use.
The bottle holders are designed to hold
bottles securely.
CAUTION
Do not attempt to use the holder for
any other purpose for which it was
intended. Inappropriately sized or
shaped objects may be thrown about
in the compartment and possibly in-
jure people in the vehicle during a
sudden braking or an accident.
Cup holderBottle holders

03 SIENNA_U (L/O 0207)
2222003 MY SIENNA (OM45410U)
The juice box holder is designed for
holding juice box securely.
CAUTION
Do not place anything else other
than juice box on the juice box
holder, as such items may be
thrown about in the compartment
and possibly injure people in the
vehicle during sudden braking or in
an accident.
Do not spill water over the holder
or its surroundings. Water may get
into the electrical components and
cause malfunction. If you spill any
water, wipe it off immediately.
AUXILIARY BOX
Although the firstaid kit and warning
reflector themselves are not included as
original equipments, this auxiliary box
(rear left side) can be used to store
them.
To open the auxiliary box, push down the
lever and pull the lid.
Ju ice bo x ho ld er
(left and right side power
sliding door models)F irst aid kit an d warn in g
reflector holder
(right side
power sliding door models)

03 SIENNA_U (L/O 0207)
2232003 MY SIENNA (OM45410U)
FIRSTAID KIT AND WARNING REFLEC-
TOR HOLDER
This belt is designed to hold the first
aid kit and warning reflector.
To use the belt, do the following.1. To loosen the belt, pull the buckle rear- ward.
2. To tighten the belt, pull the belt for- ward.
Make sure the firstaid kit and warning
reflector are securely held.Use a floor mat of the correct size.
If the floor carpet and floor mat have a
hole, then it is designed for use with a
locking clip. Fix the floor mat with locking
clip into the hole in the floor carpet.CAUTION
Make sure the floor mat is properly
placed on the floor carpet. If the floor
mat slips and interferes with the
movement of the pedals during driv-
ing, it may cause an accident.
Floor mat

03 SIENNA_U (L/O 0207)
2242003 MY SIENNA (OM45410U)

03 SIENNA_U (L/O 0207)
2252003 MY SIENNA (OM45410U)
INFORMATION BEFORE DRIVING YOUR
TOYOTA
Breakin period226
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Fuel 226
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Fuel pump shut off system 228
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Operation in foreign countries 228
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Threeway catalytic converter 229
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Engine exhaust cautions 230
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Facts about engine oil consumption 230
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Iridiumtipped spark plugs 231
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Brake system 232
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Brake pad wear limit indicators 235
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Luggage stowage precautions 235
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Roof luggage carrier 236
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Your Toyota’s identification 237
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Theft prevention labels 238
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Suspension and chassis 238
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Types of tires 239
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SECTION 2

03 SIENNA_U (L/O 0207)
2262003 MY SIENNA (OM45410U)
Drive gently and avoid high speeds.
Your vehicle does not need an elaborate
breakin. But following a few simple tips
for the first 1600 km (1000 miles) can add
to the future economy and long life of
your vehicle:
Avoid full throttle acceleration when
starting and driving.
Avoid racing the engine.
Try to avoid hard stops during the first
300 km (200 miles).
Do not drive for a long time at any
single speed, either fast or slow.
Do not tow a trailer during the first 800
km (500 miles).FUEL TYPE
Your new vehicle must use only un-
leaded gasoline.
To help prevent gas station mixups, your
Toyota has a smaller fuel tank opening.
The special nozzle on pumps with un-
leaded fuel will fit it, but the larger stan-
dard nozzle on pumps with leaded gas will
not.
At a minimum, the gasoline you use
should meet the specifications of ASTM
D4814 in the U.S.A. and CGSB 3.5M93
in Canada.NOTICE
Do not use leaded gasoline. Use of
leaded gasoline will cause the three
way catalytic converter to lose its ef-
fectiveness and the emission control
system to function improperly. Also,
this can increase maintenance costs.
OCTANE RATING
Select Octane Rating 87 (Research
Octane Number 91) or higher. For
improved vehicle performance, the use
of premium unleaded gasoline with an
Octane Rating of 91 (Research Octane
Number 96) or higher is recommended.
Use of unleaded gasoline with an octane
rating or research octane number lower
than stated above will cause persistent
heavy knocking. If it is severe, this will
lead to engine damage.
If your engine knocks...
If you detect heavy knocking even when
using the recommended fuel, or if you
hear steady knocking while holding a
steady speed on level roads, consult your
Toyota dealer.
However, now and then, you may notice
light knocking for a short time while accel-
erating or driving up hills. This is no need
of concern.
Breakin period
Fuel

03 SIENNA_U (L/O 0207)
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GASOLINE CONTAINING DETERGENT
ADDITIVES
Toyota recommends the use of gasoline
that contains detergent additives to
avoid buildup of engine deposits.
However, all gasoline sold in the U.S.
contains detergent additives to keep clean
and/or clean intake systems.
QUALITY GASOLINE
Automotive manufacturers in the U.S.,
Europe and Japan have developed a
specification for quality fuel named
WorldWide Fuel Charter (WWFC) that
is expected to be applied world wide.
The WWFC consists of three categories
that depend on required emission lev-
els. In the U.S., category 3 has been
adopted. The WWFC improves air quali-
ty by providing for better emissions in
vehicle fleets, and customer satisfaction
through better vehicle performance.CLEANER BURNING GASOLINE
Cleaner burning gasoline, including re-
formulated gasoline that contains oxy-
genates such as ethanol or MTBE is
available in many areas.
Toyota recommends the use of cleaner
burning gasoline and appropriately blended
reformulated gasoline. These types of gas-
oline provide excellent vehicle perfor-
mance, reduce vehicle emissions, and im-
prove air quality.
OXYGENATES IN GASOLINE
Toyota allows the use of oxygenate
blended gasoline where the oxygenate
content is up to 10% ethanol or 15%
MTBE. If you use gasohol in your
Toyota, be sure that it has an octane
rating no lower than 87.
Toyota does not recommend the use of
gasoline containing methanol.
SULFUR IN GASOLINE
If your vehicle is certified to California
Emission Regulations, the vehicle is
designed to operate on California
cleaner burning gasoline (CBG) that
contains lower sulfur. If you cannot use
California CBG, your emission control
system may suffer damage and turn on
the Malfunction Indicator Lamp.
If the malfunction is caused by the type
of fuel used, repairs may not be covered
by your warranty.
GASOLINE CONTAINING MMT
Some gasoline contain an octane en-
hancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl).
Toyota does not recommend the use of
gasoline that contains MMT. If fuel con-
taining MMT is used, your emission con-
trol system may be adversely affected.
The Malfunction Indicator Lamp on the in-
strument cluster may come on. If this hap-
pens, contact your Toyota dealer for ser-
vice.

03 SIENNA_U (L/O 0207)
2282003 MY SIENNA (OM45410U)
GASOLINE QUALITY
In a very few cases, you may experience
driveability problems caused by the partic-
ular gasoline that you are using. If you
continue to have unacceptable driveability,
try changing gasoline brands. If this does
not rectify your problem, then consult your
Toyota dealer.
NOTICE
Do not use gasohol other than
stated above. It will cause fuel sys-
tem damage or vehicle performance
problems.
 If driveab ility problems occur (poor
hot starting, vaporizing, engine
knock, etc.), discontinue the use.
 Take care not to spill gasohol dur-
ing refueling. Gasohol may cause
paint damage.
FUEL TANK CAPACITY
79 L (21 gal., 17.5 lmp. gal.) The fuel pump shut off system stops sup-
plying fuel to the engine to minimize the
risk of fuel leakage when the engine stalls
or an airbag inflates upon collision. To
restart the engine after the fuel pump shut
off system activates, turn the ignition
switch to “ACC” or “LOCK” once and start
it.
CAUTION
Inspect the ground under the vehicle
before restarting the engine. If you
find that liquid has leaked onto the
ground, it is the fuel system has
been damaged and it is in need of
repair. In this case, do not restart the
engine.
If you plan to drive your Toyota in
another country...
First,
comply with the vehicle registration
laws.
Second, confirm the availability of the cor-
rect fuel (unleaded and minimum octane
number).
Fuel pump shut off system Operation in foreign countries