How to Identify the Production Date of Automotive Glass?
2 Answers
To identify the production date of automotive glass, follow these steps: 1. Check the code located at the bottom left or right corner of the window glass; 2. The number represents the year, while the dots represent the month; 3. If the dots are in front of the number, it indicates the first half of the year. Subtract the number of dots from 7 to get the month in the first half; 4. If the dots are behind the number, it indicates the second half of the year. Subtract the number of dots from 13 to get the month in the second half. Types and functions of automotive glass: 1. Laminated glass: A transparent adhesive plastic film is placed between two or three layers of glass, enhancing the glass's resistance to breakage; 2. Tempered glass: Ordinary glass is quenched to create internal stress. When impacted and broken, the glass shatters into small, blunt-edged pieces, reducing the risk of injury to passengers.
Once I helped a friend check out a used car and specifically taught him how to identify the glass date. Actually, all car windows have a string of codes in the corner—just look for the part with numbers and dots. For example, if it says '2...' with 6 small black dots on the right—the number 2 represents 2022, and the dots represent months, with each dot counting as 0.5 months, so 6 dots mean it was produced in March. If there are black dots to the left of the number, it means it was produced in the first half of the year, and you subtract the number of dots from 13 to get the month; if the dots are on the right, it's the second half, and you subtract the number of dots from 7. My friend immediately noticed that the rear window glass was half a year older than the windshield, and later checked the records to confirm it had been replaced after a rear-end collision. By the way, it's normal for the glass date to be 1-3 months earlier than the car's production date.
