Tire age calculator (DOT date code)
How old is my tire?
The last four digits of a complete DOT Tire Identification Number show the manufacturing week and year. Age alone cannot confirm that a tire is serviceable: inspect pressure, wear, damage and performance, and follow the tire and vehicle maker. NHTSA says some makers recommend replacement at 6–10 years; Michelin recommends annual professional inspection after five years and replacement by ten; Continental advises removing tires over ten years, including spares.
Enter the 4-digit DOT date code from your tire sidewall — the week and year it was made.
Tire-age sources reviewed
The DOT decoding and age boundaries above were checked against current government and tire-maker guidance. These are not a universal legal limit.
- NHTSA TireWise: aging, damage, performance and the DOT TIN date field
- NHTSA electronic TIN study: old and standardized identification-number formats
- Michelin: annual professional inspection after five years and replacement by ten
- Continental: age factors and removal from service over ten years, including spares
Checked:
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- Content updated
- 2026-08-21
What changed
- Checked generated routes, metadata, sitemap inclusion and localized page rendering.