See also:

State emission testing (U.S. only)
WARNING Testing of an All-Wheel Drive vehicle must NEVER be performed on a single two-wheel dynamometer. Attempting to do so will result in uncontrolled vehicle movement and may cause an accident ...

Wear indicators
1) New tread 2) Worn tread 3) Tread wear indicator Each tire incorporates a tread wear indicator, which becomes visible when the depth of the tread grooves decreases to 0.063 in (1.6 mm). ...

Light control and wiper control levers/switches
1) Windshield wiper 2) Mist 3) Windshield washer 4) Rear window wiper and washer switch 5) Wiper intermittent time control switch 6) Wiper control lever 7) Light control switch 8) Fo ...