2023 TOYOTA SIENNA HYBRID Owners Manual

5278-1. Specifications
8
Vehicle specifications
If fuel containing MMT is used, your
emission control system may be
adversely affected.
The malfunction indicator lamp on
the instrument cluster may come on.
If this happens, contact your Toyota
dealer for service.
■If your engine knocks
●Consult your Toyota dealer.
●You may occasionally notice light
knocking for a short time while
accelerating or driving uphill. This
is normal and there is no need for
concern.
NOTICE
■Notice on fuel quality
●Do not use impro per fuels. If
improper fuels are used, the
engine will be damaged.
●Do not use leaded gasoline.
Leaded gasoline can cause
damage to your vehicle’s three-
way catalytic converters caus-
ing the emission control system
to malfunction.
●Do not use gasohol other than
the type previously stated.
Other gasohol may cause fuel
system damage or vehicle per-
formance problems.
●Using unleaded gasoline with
an octane number or rating
lower than the l evel previously
stated will cause persistent
heavy knocking.
At worst, this will lead to engine
damage.
■Fuel-related poor driveability
If poor driveability (poor hot start-
ing, vaporization, engine knock-
ing, etc.) is encountered after
using a different type of fuel, dis-
continue the use of that type of
fuel.
■When refueling with gasohol
Take care not to spill gasohol. It
can damage your vehicle’s paint.

5288-1. Specifications
Full-size tire
Compact spare tireTire size ( P.530)
DOT and Tire Identification Number (TIN) ( P.529)
Location of treadwear indicators ( P.421)
Tire ply composition and materials
Plies are layers of rubber-coat ed parallel cords. Cords are the strands
which form the pl ies in a tire.
Tire information
Typical tire symbols
A
B
C
D

5298-1. Specifications
8
Vehicle specifications
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a
bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire d oes not have a tube and air is directly put in to the tire. A
tube type tire has a tube inside t he tire and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure (P.532)
Maximum cold tire inflation pressure ( P.532)
This means the pressure to w hich a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tires or all season tires ( P.422)
An all season tire has “M+S” on the sidewal l. A tire not marked “M+S” is a
summer tire.
“TEMPORARY USE ONLY”
A compact spare tire is identifi ed by the phrase “TEMPORARY USE ONLY”
molded on its sidewall. This tire is designed for temporary emergency use
only.
Type A
DOT symbol
*
Tire Identification Number
(TIN) Tire manufacturer’s identifi-
cation mark
Tire size code
Manufacturer’s optional tire
type code (3 or 4 letters)
Manufacturing week
Manufacturing year
*: The DOT symbol certifies that the
tire conforms to applicable Fed-
eral Motor Vehicle Safety Stan-
dards.
E
F
G
H
I
J
K
Typical DOT and Tire
Identification Number
(TIN)
A
B
C
D
E
F
G

5308-1. Specifications
Type BDOT symbol
*
Tire Identification Number
(TIN)
Tire manufacturer’s identifi-
cation mark
Manufacturer’s code
Manufacturing week
Manufacturing year
*: The DOT symbol certifies that the tire conforms to applicable Fed-
eral Motor Vehicle Safety Stan-
dards.
■Typical tire size information
The illustration indicates typical
tire size.
Tire use (P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code
(R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index (2 digits or 3 dig-
its)
Speed symbol (alphabet with
one letter)
■Tire dimensions
Section width
Tire height
Wheel diameter
Tire size
A
B
C
D
E
F
A
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B
C
D
E
F
G
A
B
C

5318-1. Specifications
8
Vehicle specifications
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
This information has been pre-
pared in accordance with regu-
lations issued by the National
Highway Traffic Safety Adminis-
tration of the U.S. Department of
Transportation.
It provides the purchasers
and/or prospective purchasers
of Toyota vehicles with informa-
tion on uniform tire quality grad-
ing.
Your Toyota dealer will help answer
any questions you may have as you
read this information.
■DOT quality grades
All passenger vehicle tires must
conform to Federal Safety
Requirements in addition to
these grades. Quality grades
can be found where applicable on the tire sidewall between
tread shoulder and maximum
section width.
For example: Treadwear 200 Trac-
tion AA Temperature A
■Treadwear
The treadwear grade is a com-
parative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test
course.
For example, a tire graded 150
would wear one and a half (1 - 1/2)
times as well on the government
course as a tire graded 100.
The relative performance of tires
depends upon the ac tual conditions
of their use. Performance may dif-
fer significantly from the norm due
to variations in dri ving habits, ser-
vice practices and differences in
road characteristics and climate.
■Traction AA, A, B, C
The traction grades, from high-
est to lowest, are AA, A, B and
C, and they represent the tire’s
ability to stop on wet pavement
as measured under controlled
conditions on specified govern-
ment test surfaces of asphalt
and concrete.
A tire marked C may have poor
traction performance.
Warning: The traction grade
assigned to this tire is based on
braking (straight ahead) traction
tests and does not include corner-
ing (turning) traction.
Uniform Tire Quality
Grading
A
B
C
D
E
F
G
H
I
J
K

5328-1. Specifications
■Temperature A, B, C
The temperature grades are A
(the highest), B, and C, repre-
senting the tire’s resistance to
the generation of heat and its
ability to dissipate heat when
tested under controlled condi-
tions on a specified indoor labo-
ratory test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure.
Grade C corresponds to a level of performance which all passenger
car tires must meet under the Fed-
eral Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher
levels of performance on the labo-
ratory test wheel than the minimum
required by law.
Warning: The temperature grades
of a tire assume tha
t it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked
for three hours or more, or has not been driven
more than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a
tire may be inflated, shown on the sidewall of
the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those stan-
dard items which may be replaced) of transmis-
sion, power steering, power brakes, power
windows, power seats, radio and heater, to the
extent that these items are available as factory-
installed equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard
equipment, including th e maximum capacity of
fuel, oil and coolant, and if so equipped, air con-
ditioning and additional weight optional engine

5338-1. Specifications
8
Vehicle specifications
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that
follows
Occupant distributionDistribution of occupant s in a vehicle as speci-
fied in the third column of Table 1
* below
Production options weight
The combined weight of installed regular pro-
duction options weighing over 5 lb. (2.3 kg) in
excess of the standard items which they
replace, not previously considered in curb
weight or accessory weight, including heavy
duty brakes, ride leveler s, roof rack, heavy duty
battery, and special trim
RimA metal support for a ti re or a tire and tube
assembly upon which the tire beads are seated
Rim diameter
(Wheel diameter)Nominal diameter o f the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacture r’s designation for a
rim by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity weight
(Total load capacity)The rated cargo and luggage load plus 150 lb.
(68 kg) times the vehicl e’s designated seating
capacity
Vehicle maximum load on
the tireThe load on an individual tire that is determined
by distributing to each ax le its share of the max-
imum loaded vehicle weight, and dividing by two
Vehicle normal load on
the tire
The load on an individual tire that is determined
by distributing to each axle its share of curb
weight, accessory weight, and normal occupant
weight (distributed in accordance with Table 1
*
below), and dividing by two
Tire related termMeaning

5348-1. Specifications
Weather sideThe surface area of the rim not covered by the
inflated tire
Bead
The part of the tire that is made of steel wires,
wrapped or reinforced by ply cords and that is
shaped to fit the rim
Bead separationA breakdown of the bond between components
in the bead
Bias ply tire
A pneumatic tire in whic h the ply cords that
extend to the beads are la id at alternate angles
substantially less than 9 0 degrees to the center-
line of the tread
CarcassThe tire structure, except tread and sidewall
rubber which, when inflated, bears the load
ChunkingThe breaking away of pieces of the tread or
sidewall
CordThe strands forming th e plies in the tire
Cord separationThe parting of cords from adjacent rubber com-
pounds
CrackingAny parting withi n the tread, sidewall, or inner-
liner of the tire extend ing to cord material
CT
A pneumatic tire with an inverted flange tire and
rim system in which the rim is designed with rim
flanges pointed radially inward and the tire is
designed to fit on the underside of the rim in a
manner that encloses the rim flanges inside the
air cavity of the tire
Extra load tire
A tire designed to operate at higher loads and at
higher inflation pressures than the correspond-
ing standard tire
GrooveThe space between two adjacent tread ribs
Innerliner
The layer(s) forming th e inside surface of a
tubeless tire that contains the inflating medium
within the tire
Innerliner separationThe parting of the innerliner from cord material
in the carcass
Tire related termMeaning