Page 703 of 876

703
4-3. Do-it-yourself maintenance
4
Maintenance and care
SIENNA_OM_OM45472U_(U)
Wheels
If a wheel is bent, cracked or heavily corroded, it should be
replaced.
Otherwise, the tire may separate from the wheel or cause a loss
of handling control.
■Wheel selection
When replacing wheels, care should be taken to ensure that
they are equivalent to those removed in load capacity, diameter,
rim width and inset
*.
Replacement wheels are available at your Toyota dealer.
*: Conventionally referred to as “offset”.
Toyota does not recommend using the following:
● Wheels of different sizes or types
● Used wheels
● Bent wheels that have been straightened
■ Aluminum wheel precautions
●Use only Toyota wheel nuts and wrenches designed for use
with your aluminum wheels.
● When rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).
● Be careful not to damage the aluminum wheels when using
tire chains.
● Use only Toyota genuine bal ance weights or equivalent and
use a plastic or rubber hammer when balancing your wheels.
Page 704 of 876
704 4-3. Do-it-yourself maintenance
SIENNA_OM_OM45472U_(U)
■When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning
valves and transmitters that allow the tire pressure warning system to
provide advanced warning in the event of a loss in tire inflation pressure.
Whenever wheels are replaced, tire pressure warning valves and trans-
mitters must be installed. (P. 690)
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in
the Owner’s Manual, as this may resu lt in a loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a
tubeless tire. Doing so may result in an accident, causing death or seri-
ous injury.
Page 810 of 876
810 6-1. Specifications
SIENNA_OM_OM45472U_(U)
Tires and wheels
17-inch tires
18-inch tires
Tire size P235/60R17 100T,
T155/80R17 101M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)Front: 35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear: 35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Spare: 60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size 17 x 7J, 17 x 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size P235/55R18 99V, P235/55RF18 99T,
T155/80R17 101M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)Front: 35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Rear: 35 psi (240 kPa, 2.4 kgf/cm2 or bar)
Vehicles without run-flat tires:
Spare: 60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Wheel size 18 x 7J, 17 x 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Page 811 of 876
811
6-1. Specifications
6
Vehicle specifications
SIENNA_OM_OM45472U_(U)
19-inch tires
Tire size
P235/50R19 99V,
T155/80R17 101M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)Front: 36 psi (250 kPa, 2.5 kgf/cm2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm2 or bar)
Spare:60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size 19 x 7J, 17 x 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Page 820 of 876
820 6-1. Specifications
SIENNA_OM_OM45472U_(U)
Tire size■ 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 or 3 digits)
Speed symbol
(alphabet with one letter)
Run-flat tire code
■ Tire dimensions
Section width
Tire height
Wheel diameter
Page 825 of 876

825
6-1. Specifications
6
Vehicle specifications
SIENNA_OM_OM45472U_(U)
Tire related termMeaning
Normal occupant
weight 150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that
follows
Occupant distribution Distribution of occupants 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 levelers, roof rack, heavy duty
battery, and special trim
Rim A metal support for a tire or a tire and tube
assembly upon which the tire beads are seated
Rim diameter
(Wheel diameter) Nominal diameter of the bead seat
Rim size designation Rim diameter and width
Rim type designation The industry manufacturer’s designation for a
rim by style or code
Rim width Nominal distance between rim flanges
Vehicle capacity
weight (Total load
capacity) The rated cargo and luggage load plus 150 lb.
(68 kg) times the vehicle’s designated seating
capacity
Vehicle maximum load
on the tire The load on an individual tire that is determined
by distributing to each axle its share of the
maximum loaded vehicle weight, and dividing
by two
Page 868 of 876

868 Alphabetical index
SIENNA_OM_OM45472U_(U)
Spare tireInflation pressure...................810
Storage location .................... 763
Spark plug ................................806
Specifications...........................800
Speech command switch ........ 549
Speedometer ............................ 244
Steering wheel Adjustment ............................ 137
Audio switches ......................477
Column lock release......227, 233
Stop lights
Replacing light bulbs ............. 725
Wattage .................................812
Storage feature.........................586
Storage precautions ................363
Stuck If your vehicle becomes
stuck ...................................794
Sunshades Rear door ..............................617
Roof....................................... 150
Sun visors.................................604
Switch Engine switch ................226, 229
Fog light switch ..................... 282
Ignition switch................226, 229
Light switches........................ 268
Power back door .....................82
Power door lock switch ...........61
Power window switch ....144, 148
Window lock switch ............... 144
Wiper and washer switch .......................... 284, 292 Tachometer .............................. 244
Tail lights
Replacing light bulbs ............. 725
Switch ................................... 268
Wattage................................. 812
Talk switch ............................... 549
Telephone switch..................... 549
Theft deterrent system Alarm..................................... 162
Engine immobilizer
system ................................ 159
Theft prevention labels ........... 165
Tire inflation pressure ............. 699
Tire information Glossary ................................ 824
Size ....................................... 810
Tire identification number...... 819
Uniform tire quality
grading................................ 821
Tires Chains ................................... 367
Checking ............................... 688
If you have a flat tire...... 761, 763
Inflation pressure .................. 699
Information ............................ 817
Replacing .............................. 763
Rotating tires ......................... 689
Size ....................................... 810
Snow tires ............................. 367
Tire pressure warning system ........................ 688, 749
Tools ......................................... 763
Total load capacity .................. 366T