How Old Are
Your Tires?
Enter your DOT code. Get an instant safety verdict. Free, no sign-up, takes 10 seconds.
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Check Your Tire Age
Find the last 4 digits of the DOT code on your tire sidewall and enter them below.
Last 4 digits of the DOT code on your tire sidewall
Where to Find Your DOT Code
- 01Look at the sidewall of your tire
- 02Find the letters "DOT" followed by a series of characters
- 03The last 4 digits are the date code (e.g. 2319 = week 23 of 2019)
How TireSpy Works
Step 1
Find the DOT Code
Locate the DOT code on your tire sidewall — it's a series of characters starting with “DOT”.
Step 2
Enter the Last 4 Digits
Type the last four digits of your DOT code into TireSpy. These digits encode the week and year of manufacture.
Step 3
Get Your Safety Verdict
Get an instant safety verdict — green, amber, or red — plus personalized replacement advice.
Every tire sold in the US has a DOT code molded into the sidewall. The last four digits tell you exactly when your tire was manufactured. TireSpy uses this date combined with your tire type to give you a clear safety verdict — green, amber, or red — based on NHTSA guidelines and manufacturer recommendations.