Look for a number that starts with the letters “DOT,” followed by a series of 10-12 characters. The first two digits are the week of manufacture, and the last two digits are the year.
For example, if the last four digits of the DOT code are 0203, that means that the tire was manufactured during the second week of the year 2003. However…if your tires were made before 2000, it gets a bit more complicated.
So if you purchase new tires that were manufactured exactly two years ago they will be covered for a total of six years (four years from the date of purchase) as long as you have your receipt.
If you lose your receipt, your tires' warranty coverage will end five years from the week the tire was produced (resulting in the tire manufacturer's warranty coverage ending only three years from the date of purchase in this example).
If you look closely at the side of each of your tires, you'll see a bunch of letters and numbers.
While this may just look like a confusing jumble, it's actually useful info. Department of Transportation (DOT), will tell you several things: The date of manufacture is the last four digits of the DOT code.
The date of manufacture is the last three digits of the code.
The first two digits refer to the week within that year. Here are the facts: Except for "use by" dates, product dates don't always refer to home or restaurant storage and use after purchase. If you answered false to all four questions, congratulations! Actually, you understand that there is no uniform system. US Foods always strives to provide products that have an adequate remaining shelf life. "Best if used by" products should be evaluated if the date has passed, however, if the quality is still okay, it should be perfectly safe to use.Some tires do have a small triangle following the DOT code to indicate the 1990s.