How to Check the Year of a Tire: Reading the DOT Code Guide

Check a tire’s year by finding the DOT code on the sidewall. The last four digits show the manufacture date: the first two digits are the week, and the last two are the year, such as 1023 for the 10th week of 2023. If you see only three digits, the tire was made before 2000. Inspect both sidewalls, since the full code may appear on only one side, and age affects safety even when tread looks good.

Key Takeaways

• Find the DOT code on the tire sidewall; the last four digits show the manufacture date for most tires made after 2000.
• Read the first two digits as the production week and the last two digits as the production year, such as 1023 for week 10 of 2023.
• Older tires may have a three-digit date code, where the first two digits are the week and the last digit is the year.
• Check both sidewalls and clean the tire if needed, because the full DOT code may appear on only one side.
• Replace tires older than six years or showing cracks, bulges, or wear, even if the tread still looks good.

What the Tire Date Code Means

The tire date code is the key to reading a tire’s age: it appears at the end of the DOT code on the sidewall and tells you the week and year it was made. You read this Tire Date Code to identify when the tire was manufactured, which directly reveals the age of a tire. For tires made after January 1, 2000, the code uses four digits: the first two show the week and the last two show the year, so 1023 means the 10th week of 2023. Older tires use three digits, with two for the week and one for the year. You should treat tires over six years old as replacement candidates, even if they still look usable. Checking the DOT code also supports registration and recall notices, so you protect your rights and improve tire safety. Inspect new tires before installation, then record the code for future reference. Additionally, understanding the tread life performance of your tires can help you make informed decisions about replacements.

How to Find and Read the DOT Code

Now that you know what the tire date code tells you, you need to locate the DOT code on the sidewall to read it correctly. You’ll find the Tire TIN molded into one sidewall, starting with DOT, then a string of letters and numbers that identify the manufacturer and plant. Clean the area if the code is faint, and inspect both sidewalls, since the full code may appear on only one side.

For a modern tire made after January 1, 2000, read the last four digits of the DOT code: the first two show the week of manufacture, and the last two show the year. For example, 1023 means the tire was made in the 10th week of 2023. If you see a three-digit date, you’re dealing with an older tire. Check its age carefully; a TIN ending in three digits signals replacement is wise if it’s over six years old, because freedom starts with informed, safe choices. Additionally, ensuring that the tire meets the load index and speed rating specified by the manufacturer is crucial for safety.

How to Decode Modern Tire Dates

To decode a modern tire date, focus on the last four digits of the DOT code on the sidewall, because they tell you exactly when the tire was made. Read the tire’s DOT code and isolate the last four digits. The first two digits show the production week, and the final two digits show the year of manufacture. For example, 1023 means the tire was built in the 10th week of 2023. Use this code to assess tire age quickly and precisely. If the code has four digits, you’re looking at a tire made after January 1, 2000. For safety, check every tire, not just one. Compare the date with your service record, and replace tires that are over six years old or show other age-related wear. If you spot a three-digit code, treat it as an older tire and plan replacement. This simple readout gives you control over maintenance and safer mobility. Additionally, knowing the treadwear warranty can help you decide when to replace your tires based on their expected lifespan.

Understanding Pre-2000 Tire Codes

If you spot a three-digit date code on the sidewall, you’re looking at a pre-2000 tire: the first two digits show the production week, and the last digit identifies the year. Read the Code carefully: a three-digit date code like 439 means the tire was produced in week 43 of 1999. Because this format doesn’t state the century, you must use context and the last digit to infer the year. Check the sidewall for consistent markings, then evaluate the tire’s condition, tread, cracks, and bulges before you trust it. For safety, treat any tire older than six years as a candidate for replacement, even if the date code looks acceptable. Don’t let age hide in plain sight; inspect, verify, and decide with discipline. Additionally, keeping track of winter tire performance metrics can help ensure your tires are providing optimal safety during cold months. Your freedom on the road depends on accurate identification and honest safety assessment.

Understanding 7- to 12-Character TINs

A 7- to 12-character TIN starts with two characters that identify the plant code, followed by one to two characters for the tire size code. You can use these front sections to confirm the manufacturer and tire dimensions before you inspect the rest of the marking. The date code appears in the last four digits, and that’s the part you use to determine the week and year of manufacture. Additionally, understanding the tire size code can help ensure compatibility with your vehicle’s requirements.

Plant And Size Codes

The Tire Identification Number, or TIN, starts with a two-character plant code that tells you where the tire was manufactured, followed by one to two characters for the tire size code. You can use this Tire Identification Number (TIN) to identify tire manufacturers, compare a tire size, and confirm the DOT symbol format on the sidewall. After the plant code and size code, tire makers may add up to four characters for construction details. For tires made after 2000, the last four digits show the week of the year and year of manufacture, so you can assess age with precision.

• Read the plant code first.
• Match the tire size code next.
• Check the last four digits for date data.

Date Code Placement

On tires with a 7- to 13-character Tire Identification Number, the date code sits at the very end of the TIN, so you can find it after the plant code, size code, and any construction details. Read the Tire Identification Number (TIN) from left to right, then isolate the last four digits; those digits give the week and year of manufacture. For tires manufactured after January 2000, the first two digits show the production week and the last two digits show the year, such as 1023. For older tires, the code has three digits, and the first two digits still mark the week. Understanding the TIN helps you verify tire age, protect tire safety, and make informed choices about service or replacement.

Understanding 13-Character TINs

A 13-character TIN starts with three characters that identify the plant code, followed by six characters that specify the tire size and type. You’ll find the last four digits at the end of the code, and they show the manufacturing week and year. For example, a TIN ending in 2910 means the tire was made in the 29th week of 2010. Tire durability is crucial, as it impacts overall performance and safety.

13-Character TIN Format

To read a 13-character Tire Identification Number (TIN), start with the first three characters, which identify the plant where the tire was made. On the DOT code, the first two characters plus the third create the plant code, while the next six characters specify size and type. You’ll use the last four digits to confirm the date of manufacture. For example, 2910 means the 29th week of 2010, and those four digits anchor tire manufacturers compliance.

• Find the full DOT code on at least one sidewall.
• Read the Tire Identification Number (TIN) in sequence, left to right.
• Verify the last four digits for the tire’s production date.

Tires built after April 13, 2025, must show this format, so you can track provenance and keep your choices free.

Plant And Size Codes

The first three characters of a 13-character TIN identify the plant code, showing where the tire was made, and the next six characters specify the tire’s size and type. You can read this Tire Identification Number (TIN) on the DOT code to verify which manufacturers produced it and whether it matches your vehicle’s tire specifications. Use the plant code to trace origin, then check the next six characters for exact construction details, fit, and performance class. This matters because precise coding helps you choose tires that meet safety standards and resist dependence on vague labeling. On tires made after April 13, 2025, the full 13-character format is required. The last four digits state the manufacturing date: the first two digits show the week, and the last two digits show the year.

Manufacturing Week And Year

Once you’ve found the 13-character TIN, read the last four digits to identify the tire’s manufacturing week and year. In a Tire Identification Number (TIN), the last four digits encode the date code: the first two numbers show the production week, from 01 to 53, and the last two digits show the production year. For example, 2910 means the 29th production week of 2010. Tires built after January 1, 2000, use this four-digit format, so you can verify age quickly and accurately. Older tires may still show a three-digit code, where the first two digits indicate production week and the final digit marks production year. Use this data to judge service life, not just tread depth.

• Check both sidewalls for the DOT mark.
• Match week and year before purchase.
• Replace aging tires even if tread looks usable.

Frequently Asked Questions

How to Check Tire Age by Dot Number?

Check your tire’s DOT code on the sidewall, then read the last four digits: the first two show the week, and the last two show the year. For example, 1023 means week 10 of 2023. This DOT code significance helps you assess tire age importance, tire safety guidelines, and tire replacement signs. Follow tire maintenance tips, inspect for effects of aging, and review tire storage recommendations during the tire inspection process.

Does the Dot Code Tell Me the Tire’s Age?

Yes—the DOT code tells you your tire’s age, like a stamped birthmark on the sidewall. You read the last four digits for week and year, then judge tire expiration against safety concerns, tread wear, and DOT regulations. Use that data for tire maintenance, watch replacement indicators, and assess performance impact, especially with seasonal considerations. If it’s over six years old, you should inspect closely; ten years often means replace it.

How to Read Dot Tire Date Code?

You read the DOT tire date code by finding the last four digits on the sidewall: the first two show the week, and the last two show the year. For example, 1023 means the 10th week of 2023. Use this for tire maintenance, tread wear, proper inflation, seasonal storage, replacement guidelines, tire longevity, performance factors, and safety checks, so you can decide when it’s time to replace them.

Are 20 Year Old Tires Safe to Drive?

No, you shouldn’t drive on 20-year-old tires. You’re looking at cracked rubber, hardened sidewalls, and hidden aging effects that can’t be fixed by tread wear alone. Tire safety drops fast as performance decline, weather damage, and poor storage conditions compound. Follow replacement guidelines: replace them now, even if tread looks fine. Old tires increase driving risks, and you deserve reliable control, precise braking, and freedom on the road.

Conclusion

Now that you know how to read the DOT code, you can pinpoint a tire’s age in seconds—no guesswork, no drama, no dangerous surprises. Check the last four digits on modern tires, and identify the week and year of manufacture with surgical precision. If you spot an older 3-digit code, handle it carefully and verify the date format. You’ve got the tools to decode any tire like a pro and make smarter, safer decisions.