How to Interpret the Production Date on Car Glass?
2 Answers
Method for interpreting the production date on car glass: 1. The production date of car glass can be identified by a code located at the bottom left or right corner of the window glass. Look for a number and several small black dots in the last or second-to-last row; 2. The number represents the last digit of the production year of the glass. The production date of the glass and the vehicle will not differ by more than 10 years; 3. The small black dots indicate the production month of the glass. If the black dots are in front of the number, subtract the number of dots from 7. If the black dots are behind the number, subtract the number of dots from 13; 4. Some glass may also have a few thick black dots following the production year and month. These dots indicate the specific week of the month. For example, 5 dots represent the first week, 4 dots represent the second week, and 3 dots represent the third week.
After years of working on cars, I've found that decoding the production date on a car's windshield is actually quite simple. There are usually codes in the corners of the glass, where numbers indicate the year and small dots represent the month or week. For example, seeing "3.20" means the glass was produced in the third week of 2020. A dot before the number indicates the week, while a dot after indicates the year. This method helps you determine if the glass is original, especially on used cars: if the vehicle's production date is 2019 but the glass shows 2021, it means the glass was replaced, possibly due to an accident. Regular checks can also prevent aging issues, as old glass is prone to cracking at high speeds. In short, get into the habit of taking photos with your phone for verification—it becomes second nature, ensuring safety and peace of mind.
