4-3. Do-it-yourself maintenance
Tires
Replace or rotate tires in accordance with maintenance sched-
ules and treadwear.
■
Checking tires
688
SIENNA_OM_OM45483U_(U)
New tread
Treadwear indicator
Worn tread
The location of treadwear
indicators is shown by the
"TWI" or "
" marks, etc.,
molded on the sidewall of
each tire.
Vehicles with compact spare
tire: check spare tire condi-
tion and pressure if not
rotated.