Wear Indicators
WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.
Originally installed tires have built-in tread wear indicators (1).
These indicators appear as 7 mm (0.27 in) wide bands when the tire tread depth becomes 1.6 mm (0.063 in).
If a tire has indicators (1) appearing across 3 or more tread grooves at 6 locations, replacement of the tire is recommended.
Tire wear limit
limit: 1.6 mm (0.063 in)