2004 Toyota Sienna Owners Manual - Page 468

04 SIENNA_U (L/O 0408) Rotating tires D Do not mix radial, bias belted, or bias −ply tires on your vehicle, as this may cause dangerous handling characteristics resulting in loss of control. D Do not use tires other than the manufacturer's recommended size, as this may cause dangerous handling characteristics resulting in loss of control. D All −wheel drive models: Do not use tires of different brands, sizes, construction or tread patterns, as this may cause dangerous handling characteristics resulting in loss of control. Toyota recommends all four tires, or at least both of the front or rear tires be replaced at a time as a set. See "If you have a flat tire" on page 411 for tire change procedure. When a tire is replaced, the wheel should always be balanced. An unbalanced wheel may affect vehicle handling and tire life. Wheels can get out of balance with regular use and should therefore be balanced occasionally. When replacing a tubeless tire, the air valve should also be replaced with a new one. Initial adjustment of the tire pressure warning system is necessary after you have rotated your tires. See "Tire pressure warning system" on page 188 in Section 1 −6. To equalize the wear and help extend tire life, Toyota recommends that you rotate your tires according to the maintenance schedule. (For scheduled maintenance information, please refer to the "Scheduled Maintenance Guide" or "Owner's Manual Supplement".) However, the most appropriate timing for tire rotation may vary according to your driving habits and road surface conditions. See "If you have a flat tire" on page 411 in Section 4 for tire change procedure. 468 2004 SIENNA from Aug. '04 Prod. (OM45422U)