How to Read the Date on Car Window Glass?
3 Answers
How to Read the Date on Car Window Glass: There is a code in the lower left or lower right corner of the car window glass. The last or second-to-last row contains a number and several small black dots, which indicate the production date of the glass. For new cars, the glass is usually new, but when buying a used car, many people may not easily notice if the glass has been replaced. In addition to checking the production date, you can also look at the brand label. After replacement, the label on the new glass will differ significantly from the original factory glass. Typically, the original factory glass label includes not only the car brand logo but also the glass brand logo. Due to certain policies of car manufacturers, retail suppliers are prohibited from using the car brand trademark on the market. As a result, most replacement glasses only have the glass brand label without the car brand label.
I remember often helping customers check this during car repairs. There's always a small mark in the corner of the window glass, consisting of numbers and dots. The numbers represent the last two digits of the production year, with dots in front indicating the first half of the year and dots behind indicating the second half. For example, '23.' means January 2023, and '23.' means July 2023. Sometimes, the number of dots represents specific weeks, allowing for a more precise calculation of the date. This is very important because when checking the aging of the glass or whether a used car has had its glass replaced, comparing the codes on all the glass reveals the true situation. I recommend first cleaning the corner of the glass with a soft cloth and carefully observing the mark's position. The markings may vary slightly between different car brands, but the basic rules are similar. Ensure timely handling to avoid affecting driving safety.
As a car owner, I always check the glass date whenever I wash my car. Look for a small code with numbers and dots on the edge of the window—the number indicates the year (e.g., 23 means 2023), and the dot's position shows the month (e.g., .23 is January, 23. is July). My windshield is marked .19, meaning January 2019, and after 4 years of use, it's still in good condition. During an inspection, the evaluator mentioned that if all the glass dates match, it suggests no major accidents; otherwise, insurance records should be checked. This simple trick has saved me a lot of hassle and taught me detailed car knowledge. Next time I buy a car, I’ll be sure to verify this carefully.
