How to Check the Manufacturing Date of Car Glass?

2 Answers
JasperLynn
07/29/25 5:38am
To check the manufacturing date of car glass, follow these steps: 1. Look for the code at the bottom left or right corner of the window glass; 2. The number represents the year, and the dots represent the month; 3. If the dots are in front of the number, it indicates the first half of the year, and the month can be calculated by subtracting the number of dots from 7; 4. If the dots are behind the number, it indicates the second half of the year, and the month can be calculated by subtracting the number of dots from 13. The classification and functions of car glass are: 1. Laminated glass is made by bonding a transparent plastic film between two or three layers of glass, enhancing its resistance to breakage; 2. Tempered glass is produced by quenching ordinary glass to create internal stress, so when it shatters upon impact, it breaks into small pieces with blunt edges, reducing the risk of injury to passengers.
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LaAurora
08/12/25 9:12am
I usually enjoy tinkering with car windows and would like to share how to check the manufacturing date: There’s usually a special mark in the corner of the window called a dot code. The format is typically a combination of numbers, dots, and letters. The number represents the last digit of the year—for example, 8 stands for 2028. The number of dots indicates the month, with one dot for January, two for February, and so on. The most common location is on the driver’s side of the windshield. I recommend using a flashlight for better visibility, as relying solely on natural light might cause you to miss it. The dot code position varies slightly across different car models, but the checking method is essentially the same. Knowing the date is crucial—it helps determine if the glass is original. If the dates don’t match, the car might have been in an accident and had its glass replaced, which could pose safety risks. Keeping a record yourself can be very useful for future maintenance or when selling the car, helping to avoid disputes.
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