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Read the last two digits of the DOT code. The last two digits are the year of manufacture. If the last two digits are 07, for example, the tire was manufactured in 2007. The two digits before the year indicate the week of the year that the tires were manufactured. There are 52 weeks in a year, so these two digits range from 01 to 52.
Find Your Tire's Date Code. To find your tire's date code, identify the code on the tire that begins with 'DOT'. The 'DOT' should be followed by a series of four letters and/or numbers. You will find the 4-digit date code following this set of letters and/or numbers. It will be a 4-digit code containing all numbers.