Tire wear

When the tread is worn down to 1/16th of an inch (2 mm), tires must be replaced to help prevent your vehicle from skidding and hydroplaning. Built-in treadwear indicators, or “wear bars”, which look like narrow strips of smooth rubber across the tread will appear on the tire when the tread is worn down to 1/16th of an inch (2 mm).
When the tire tread wears down to the same height as these “wear bars”, the tire is worn out and must be replaced.

See also:
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Automatic dimming interior rear view mirror
The interior rear view mirror and a driver’s side exterior mirror have an
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System warnings and status messages
System warnings alert you to possible problems or malfunctions in your
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Note: Depending on the vehicle options equipped with your vehicle, not
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