See also:

Tire information
Typical tire symbols 1 Tire size 2 Summer tire or all season tire An all season tire has “M+S” on the sidewall. A tire not marked “M+S” is a summer tire. 3 Uniform tire quality grading ...

Engine
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Emissioinspectioand maintenance (I/M) programs
Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system. - If the malfunction i ...