The tire date code identifies the production week and year as part of the tire identification marking.
The tire date code identifies the production week and year as part of the tire identification marking.
On modern tires, the final four digits commonly indicate production week and two-digit year. The complete identification may be molded on only one sidewall.
The code does not state mileage, installation date, storage quality or remaining structural condition. It is context, not a complete verdict.
Photograph the code for traceability and apply the tire and vehicle manufacturer age recommendations together with a complete physical inspection.
What the finding means
On modern tires, the final four digits commonly indicate production week and two-digit year. The complete identification may be molded on only one sidewall.
The code does not state mileage, installation date, storage quality or remaining structural condition. It is context, not a complete verdict.
Possible contributors
A visible pattern or measured condition is evidence, not proof of one component failure. Compare all tire positions and combine the tire findings with pressure, alignment, wheel-end and service-history data.
| Condition to consider | Role | Verification |
|---|---|---|
| Code hidden on the inner sidewall | Possible contributor | Verify with measurements and vehicle history |
| Dirt or dressing reducing contrast | Possible contributor | Verify with measurements and vehicle history |
| Characters confused with size or mold markings | Possible contributor | Verify with measurements and vehicle history |
| Manufacture date mistaken for installation date | Possible contributor | Verify with measurements and vehicle history |
| Age used without physical-condition inspection | Possible contributor | Verify with measurements and vehicle history |
Workshop inspection procedure
- Inspect both sidewalls
- Clean and illuminate the marking
- Record the full visible identification
- Interpret the final date digits carefully
- Combine age with condition, use and manufacturer recommendations
Pressure, tire position, measurements, photographs and vehicle condition should be recorded before correction. That evidence makes the recommendation understandable and supports future comparison.
Service decision and follow-up
Photograph the code for traceability and apply the tire and vehicle manufacturer age recommendations together with a complete physical inspection.
Inspect the opposite tire and the other axle before finalizing the recommendation. When corrective work is performed, set a verification point so the workshop can confirm that new wear is no longer progressing abnormally.
Tread depth does not override a bulge, exposed reinforcement, suspected separation, severe run-flat history or damage outside an approved repair procedure.
Frequently asked questions
What does the final four-digit DOT code show?
It identifies the week and year of manufacture. For example, 2425 means the twenty-fourth week of 2025.
Is the date code always visible on the outer sidewall?
No. The complete code may appear on only one side, so the inner sidewall may need inspection.
Does tire age alone determine replacement?
Age is one factor. Follow the tire and vehicle manufacturer guidance and evaluate condition, service history, storage and damage.
Should the date code be included in the report?
Yes when age is relevant to the service decision or the customer requested a complete tire-condition record.
Technical review edition · Published 17 July 2026.