Enter your tire's DOT Code (last 4 digits) into the Tire Age Calculator to find out your tire's manufacturing date, exact age in days, and whether it's due for replacement — because that four-digit number stamped on your sidewall tells you more than you'd think.
Tire Age
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Manufacturing Date
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Replacement Status
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Age in Days
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Look at the sidewall of your tire for a code following the letters 'DOT'. The last 4 digits represent the week and year of manufacture (WWYY format). For example, '3822' means the 38th week of 2022.
The DOT code helps you determine when your tire was manufactured, which is crucial for safety. Tires degrade over time regardless of tread depth, and most manufacturers recommend inspection after 6 years and replacement by 10 years.
A 3-digit code indicates your tire was manufactured before 2000, likely in the 1990s or earlier. These tires are well past their service life and should be replaced immediately for safety reasons.
While tire life varies, most manufacturers recommend inspection after 5-6 years and replacement by 10 years regardless of tread depth. Factors like storage conditions, heat, and inflation pressure affect tire aging.
The DOT code is located on the tire sidewall, usually on the inner side. It starts with the letters 'DOT' followed by up to 13 characters. You only need the last 4 digits for the manufacturing date.
Heat, sunlight exposure, low inflation pressure, and improper storage can accelerate tire aging. Even tires with good tread can become unsafe due to age-related deterioration of rubber compounds.
Yes, age is a critical safety factor. Even if your tires have adequate tread depth, rubber compounds deteriorate over time, making the tire more prone to failure. Follow manufacturer guidelines for age-based replacement.