How to Identify the Production Date of Car Window Glass?
3 Answers
The method to identify the production date of car window glass is as follows: 1. The production date of car glass can be found in the corner of the glass, marked by a logo consisting of several dots and a number. By analyzing the number and black dots on the logo, you can determine the production date of the car glass. 2. The month of the car glass can be analyzed and judged by the black dots before or after the number. If the dots are on the left, it represents the first half of the year, while dots on the right represent the second half. 3. The date code on the glass consists of only one number, representing the last digit of the year. For example, the number 8 represents 2008. As for why it's not 1998, you can determine this based on the vehicle's manufacturing period, as the glass and the vehicle's production date will not differ by more than ten years.
Finding the production date of car window glass is actually quite simple. I often help friends check their cars and usually start by examining the corners of the glass. Here's the method: Look for small markings on the edge of the glass, typically a circle or a series of numbers with dots, such as "23." which might indicate the 23rd week of 2023. The windshield usually has this marking in the lower left or right corner, while side windows may have it in different locations. I recommend using a damp cloth to clean the area to avoid dust obscuring the mark—good lighting makes it easy to spot at a glance. Why is this important? Glass deteriorates over time, becoming prone to cracking or losing transparency, especially in sunny regions where aging accelerates. Checking the date helps determine if replacement is needed or prevents buying a car with refurbished parts. Original factory glass dates generally align with the vehicle's production date, so comparing them when installing new glass is quick, ensures safety, and provides peace of mind.
Having driven for over 20 years, here's how I check the production date of car window glass: First glance around the four edges of the glass to find a small marking, usually consisting of numbers and dots. The numbers represent the last two digits of the year, while the dots indicate the week number. For example, "20." might mean the fifth week of 2020. Windshields usually have this marking near the driver's side corner, while side windows can vary in position. Use a flashlight if the lighting is poor for better visibility. I always remind people this habit is quite practical - as glass ages, its transparency decreases, which can easily distract during highway driving. Checking the date helps identify aging risks early. Replacement frequency might increase after summer sun exposure, and you can often handle it yourself, saving on repair costs.
