How to Check the Manufacturing Date of a Car's Windshield?
3 Answers
To check the manufacturing date of a car's windshield, look for the code in the lower left or lower right corner of the windshield. The number represents the year, and the dots represent the month. 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. 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. Methods for maintaining car glass: Use automotive-specific glass cleaner; apply high-quality sun film to the car glass; purchase glass insurance; regularly clean dirt from the car glass; cover the windshield with something when parking outdoors in winter. How to choose a car windshield: Choose from legitimate channels and manufacturers to avoid being scammed. Legitimate manufacturers will have 3C certification. Do not opt for cheap glass, as inferior quality can endanger driving safety. The labels on qualified products are hard to scrape off with a blade, while counterfeit products will come off easily. Qualified glass has smoother edges when broken, while inferior glass is very sharp. Car windshields mainly consist of three types: laminated glass, tempered glass, and zone-tempered glass. Laminated glass involves bonding a transparent adhesive plastic film between two or three layers of glass, combining the toughness of plastic with the hardness of glass to enhance the glass's resistance to breakage. When the outer glass is impacted and cracks, the fragments are held together by the adhesive, forming only radial cracks without scattering, thus preventing accidents.
Here's a super practical trick for you—deciphering the date on the windshield is just like cracking a code. Squat at the front of the car and look at the four corners of the glass, especially the bottom left or right corner, for a string of small characters with dots and numbers. The year is indicated by the numbers—for example, "23" means 2023. For the month, look at the dots: dots before the number indicate the first half of the year, while dots after the number indicate the second half, with each dot representing a month. If there's a square symbol, the calculation is reversed. That's how I figured out the date on my used car—I noticed a three-month gap between the production dates of the two glass panels, meaning the previous owner must have replaced the windshield. After checking the date, you can also inspect the glass for any cracks!
I often do this when helping friends inspect cars. There's usually a production code printed in the lower right corner of the windshield, like a small label. The numbers represent the last two digits of the year, for example, 24 means 2024. The key is to look at the dots or squares before and after the number: if there are 3 dots before the number, it means the glass was produced in March; if there are 3 dots after the number, it means September. The square symbols work the opposite way: 3 squares to the left of the number means September, while 3 squares to the right means March. Yesterday, when helping my neighbor check his Japanese car, I found the glass was produced in July 2023, half a year earlier than the car's manufacturing date, which makes perfect sense. If you can't remember, just take a photo and study it later.
