DOT Code 5323
A tire stamped DOT 5323 was made in the 53rd week of 2023 — around December 31, 2023 - January 6, 2024. That makes it about 2.6 years old today, with 2 winters behind it (winter production).
Decoded from the last 4 digits of the US DOT Tire Identification Number per NHTSA 49 CFR § 574.5: week "01" is the first full calendar week of the year, and each week runs Sunday through Saturday. The date code encodes only the manufacturing week and year.
Year interpretation: the molded year symbols 23 are read as 2023. Four-digit date codes apply to tires made since 2000; pre-2000 tires used a three-digit format and are outside this decoder.
When was this tire made?
Production timeline & age milestones
- Vulcanized — December 31, 2023 - January 6, 2024
Winter production: Tires molded in winter weeks typically reach retail shelves for the spring and summer selling season. Production season has no effect on tire quality — vulcanization is a temperature-controlled indoor process year-round.
- 6-year mark — December 31, 2029 - January 6, 2030 (upcoming)
This tire will reach the 6-year inspection checkpoint recommended by many manufacturers during the week of December 31, 2029 - January 6, 2030.
- 10-year mark — December 31, 2033 - January 6, 2034 (upcoming)
The 10-year replacement threshold some manufacturers cite will arrive during the week of December 31, 2033 - January 6, 2034.
- Today — 2.6 years old
2 full winters and roughly 135 weeks have elapsed since this tire left the mold.
Tires made in 2023: the current regulatory era
- ▸A tire stamped 2023 carries the modern 13-symbol TIN under 49 CFR § 574.5; the UK's statutory 10-year age limit for passenger-carrying vehicles (in force since February 2021) applies to tires of every production year, including this one.
- ▸In the EU, tires sold from May 2021 carry the updated 2020/740 label with QR-linked product data — a 2023 tire sold in Europe falls under this scheme.
- ▸At this age the tire is within its early service window; the DOT date code mainly serves to anchor future inspection timing.
📅 Age-Based Guidance
The date code establishes manufacture age only. It does not establish condition or whether the tire is suitable for continued use.
Follow the pressure, rotation, inspection, and maintenance schedule in your vehicle owner’s manual.
Source: NHTSA recommends following your vehicle and tire manufacturer's specific guidance on tire age and replacement. Age recommendations vary by manufacturer — always consult your owner's manual.nhtsa.gov/vehicle-safety/tires ↗
Five things worth checking, regardless of age
Check pressure monthly
Check cold, against the pressure listed on your driver-side door jamb — not the number on the tire sidewall.
Check tread depth
Use the penny test or a tread gauge. 2/32" is a commonly cited U.S. minimum — check your state and vehicle manufacturer guidance, and consider replacing earlier for winter driving.
Look for visible damage
Cracks, cuts, bulges, or sidewall crazing are reasons to have a tire professional inspect the tire regardless of age.
Note storage conditions
Infrequent use, direct sun, and warm climates accelerate aging — a reason to check sooner, not a reason to skip checking.
Keep up with rotation
Follow your owner’s manual rotation interval and pattern; uneven wear on one tire often signals a pressure or alignment issue worth checking.
This is a general checklist, not a diagnosis — a tire professional's inspection is the only way to confirm a specific tire's condition.
What the DOT date code tells you
✅ What it reveals
- • Manufacturing week (01–52; some calendar years include week 53)
- • Manufacturing year for the modern post-2000 format
- • Approximate calendar date range
- • Current tire age in years
❌ What it does NOT reveal
- • Tire brand or manufacturer
- • Manufacturing plant or country
- • Tire model, size, or compound
- • Wet grip, noise, or fuel efficiency
- • Whether the tire is safe to use
The full Tire Identification Number (TIN)
The 4-digit date code is only the final part of the full US DOT Tire Identification Number (TIN). The complete TIN format (as of 49 CFR § 574.5, updated April 2025) is:
Source: eCFR Title 49, Subtitle B, Chapter V, Part 574 —ecfr.gov ↗
Frequently asked questions
What does DOT 5323 mean?▼
DOT 5323 means the tire was manufactured during week 53 of 2023 — approximately December 31, 2023 - January 6, 2024. The 4-digit date code does NOT identify the tire brand, model, plant, or any performance characteristic.
Could 23 mean 1923 instead of 2023?▼
Not in the modern 4-digit date format decoded here. Four-digit DOT date codes are used for tires manufactured since 2000, so 23 is interpreted as 2023. Pre-2000 tires used a 3-digit date code, and the decade can be ambiguous without additional markings.
Does tire age alone determine if a tire is safe?▼
No. Tire safety depends on tread depth, visible damage, storage conditions, and your vehicle manufacturer's specific recommendations. Age is one factor among many. NHTSA recommends following your vehicle and tire manufacturer's guidance.
Where can I find the full DOT/TIN on my tire?▼
Look on the tire sidewall for the letters "DOT" followed by the full Tire Identification Number. The last 4 digits are the date code. You may need to check both sidewalls — the full TIN is sometimes on the inward-facing side only.
When does a tire stamped DOT 5323 turn 10 years old?▼
A tire stamped DOT 5323 will reach the 10-year mark during the week of December 31, 2033 - January 6, 2034. Some tire and vehicle manufacturers recommend replacement by that age, regardless of remaining tread depth.
How many winters has a DOT 5323 tire been through?▼
Approximately 2 full winters have passed since this tire was vulcanized in winter 2023 (week 53). Seasonal temperature cycling contributes to gradual rubber compound aging, alongside UV exposure and storage conditions.
More free tools
Check your pressure
Start from your vehicle’s door-jamb cold PSI and see how temperature affects a gauge reading.
Compare tire sizes
See the diameter, sidewall, and speedometer impact of a size change.
Look up the plant code
Look up the code group right after "DOT" in a documented plant-code reference.
Read the sidewall
Understand load index, speed rating, UTQG, and every other marking.