How to Check the Production Date of a Car from the Windows?

2 Answers
DeJaxon
07/29/25 6:03am
Here are the methods to check the production date of a car from its windows: 1. There is usually a code at the bottom left or right corner of the car window. The last row of the code consists of a number and several black dots, which represent the production date of the glass. 2. The number in the code indicates the production year, while the black dots represent the production month of the glass. 3. The production year of the glass should be interpreted in conjunction with the car's manufacturing date: For example, if the number in the last row is 8, and the car was manufactured in 2007 or 2008, then the glass production year can be deduced as 2008. 4. The production month of the glass is determined by the position of the black dots: If the dots are in front of the number, subtract the number of dots from 7; if the dots are behind the number, subtract the number of dots from 13. The result is the production month of the glass.
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DelEloise
08/12/25 9:33am
Checking the production date of a car on its windows is actually quite simple, and I learned this trick when I bought my car. There's a small label on the edge of the glass, usually in a corner, printed with numbers and dots. When I helped a friend pick out a used car, I found that the numbers on the label indicate the year—for example, 23 means 2023, and the dots on the left represent the month—each additional dot adds one month. If you can't find it, try looking at the lower right corner of the windshield or side window, as most car manufacturers place it there. Don't forget, if the window has been replaced with new glass, the date might not match the car's VIN number, which suggests the car has been in an accident, so be sure to carefully check the paint and mechanical parts. For me, this method is faster than checking the registration certificate, saving me from memorizing a bunch of codes. In short, these small details on the windows hold a lot of information, and with a bit of practice, you'll get the hang of it.
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