2009 Mazda CX-9 Owner's Manual - Page 449

Maintenance and Care Owner Maintenance CAUTION (With Tire Pressure Monitoring System) When replacing/repairing the tires or wheels or both, have the work done by an Authorized Mazda Dealer, or the tire pressure sensors may be damaged. NOTE (With Tire Pressure Monitoring System) l When tires with steel wire reinforcement in the sidewalls are used, the system may not function correctly even with a genuine wheel. Refer to System Error Activation on page 5-31. l Be sure to install the tire pressure sensors whenever tires or wheels are replaced. Refer to Tires and Wheels on page 5-31. NOTE Tires degrade over time, even when they are not being used on the road. It is recommended that tires generally be replaced when they are 6 years or older. Heat caused by hot climates or frequent high loading conditions can accelerate the aging process. You should replace the spare tire when you replace the other road tires due to the aging of the spare tire. Regarding the manufacturing week and year is indicated with 4 digit. Refer to The tire labeling on page 9-24. qTemporary Spare Tire Inspect the temporary spare tire at least monthly to make sure it's properly inflated and stored. NOTE The temporary spare tire condition gradually deteriorates even if it has not been used. If a tire wears evenly, a wear indicator will appear as a solid band across the tread. Replace the tire when this happens. Tread wear indicator The temporary spare tire is easier to handle because of its construction which is lighter and smaller than a conventional tire. This tire should be used only for an emergency and only for a short distance. Use the temporary spare tire only until the conventional tire is repaired, which should be as soon as possible. (Except Mexico) Maintain its pressure at 420 kPa (4.2 kgf/cm2 or bar, 60 psi). (Mexico) Maintain its pressure at 250 kPa (2.5 kgf/cm2 or bar, 36 psi). New tread Worn tread You should replace it before the band is across the entire tread. 8-35